taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
5F4487ACFFA5FFA5FD8D7C8CFAF67805.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793432/files/figure.png	https://doi.org/10.5281/zenodo.5793432	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA5FFA5FD8D7C8CFAF67805.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793436/files/figure.png	https://doi.org/10.5281/zenodo.5793436	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA5FFA5FD8D7C8CFAF67805.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793438/files/figure.png	https://doi.org/10.5281/zenodo.5793438	Fig. 7. Details of siphuncle and septal necks, median sections of cyrtoconic ellesmeroceratids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Note the loxochoanitic septal necks and the concave siphuncular segments. A. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. B. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. Scale bar = 1 mm for all figures.	Fig. 7. Details of siphuncle and septal necks, median sections of cyrtoconic ellesmeroceratids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Note the loxochoanitic septal necks and the concave siphuncular segments. A. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. B. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. Scale bar = 1 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA5FFA5FD8D7C8CFAF67805.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793444/files/figure.png	https://doi.org/10.5281/zenodo.5793444	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA7FFA3FDB07D9DFE857F79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793432/files/figure.png	https://doi.org/10.5281/zenodo.5793432	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA7FFA3FDB07D9DFE857F79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793436/files/figure.png	https://doi.org/10.5281/zenodo.5793436	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA7FFA3FDB07D9DFE857F79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793438/files/figure.png	https://doi.org/10.5281/zenodo.5793438	Fig. 7. Details of siphuncle and septal necks, median sections of cyrtoconic ellesmeroceratids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Note the loxochoanitic septal necks and the concave siphuncular segments. A. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. B. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. Scale bar = 1 mm for all figures.	Fig. 7. Details of siphuncle and septal necks, median sections of cyrtoconic ellesmeroceratids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Note the loxochoanitic septal necks and the concave siphuncular segments. A. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. B. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. Scale bar = 1 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA2FFA1FDF77DECFC2D7BF3.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793432/files/figure.png	https://doi.org/10.5281/zenodo.5793432	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA3FFBCFDDC7BDBFA947897.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793448/files/figure.png	https://doi.org/10.5281/zenodo.5793448	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA3FFBCFDDC7BDBFA947897.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793452/files/figure.png	https://doi.org/10.5281/zenodo.5793452	Fig. 10. Median section of orthocones from bed PO 131 of the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Catoraphiceras sp., FMNH-P30425, with graptolite trapped in siphuncle. B–D. Proterocameroceras vallhallfonnense sp. nov. B. Specimen FMNH-P30429. C–D. Holotype, specimen FMNH-P30427. C. Complete specimen with asymmetric endosiphuncular deposits and imploded septa. D. Detail of holotype showing dorsal side of connecting ring and septal necks. Scale bars: A–B = 2 mm; C = 10 mm; D = 1 mm.	Fig. 10. Median section of orthocones from bed PO 131 of the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Catoraphiceras sp., FMNH-P30425, with graptolite trapped in siphuncle. B–D. Proterocameroceras vallhallfonnense sp. nov. B. Specimen FMNH-P30429. C–D. Holotype, specimen FMNH-P30427. C. Complete specimen with asymmetric endosiphuncular deposits and imploded septa. D. Detail of holotype showing dorsal side of connecting ring and septal necks. Scale bars: A–B = 2 mm; C = 10 mm; D = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFA3FFBCFDDC7BDBFA947897.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793456/files/figure.png	https://doi.org/10.5281/zenodo.5793456	Fig. 11. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, genus and species indet. B, FMNH-P30424, see also Fig. 49A. B. Buttsoceras buldrebreenense sp. nov., FMNH-P30421, holotype, see also Fig. 35A. C. Proterocameroceras vallhallfonnense sp. nov., FMNH-P30429, see also Fig. 10B. Without scale.	Fig. 11. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, genus and species indet. B, FMNH-P30424, see also Fig. 49A. B. Buttsoceras buldrebreenense sp. nov., FMNH-P30421, holotype, see also Fig. 35A. C. Proterocameroceras vallhallfonnense sp. nov., FMNH-P30429, see also Fig. 10B. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBFFFB8FDFB7816FBB67907.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794307/files/figure.png	https://doi.org/10.5281/zenodo.5794307	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBFFFB8FDFB7816FBB67907.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793460/files/figure.png	https://doi.org/10.5281/zenodo.5793460	Fig. 13. Details of the conch surface of transversally ornamented orthocones from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30383, holotype, from bed PO 131. B. Eosomichelinoceras borealis sp. nov., FMNH-P30279, holotype, from bed PO 123.3. C. Bactroceras boliviensis Aubrechtová, 2015, FMNH-P30232, from bed PO 131, conch section with nearly cyclic spacing of transverse striae. Scale bar = 10 mm for all figures.	Fig. 13. Details of the conch surface of transversally ornamented orthocones from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30383, holotype, from bed PO 131. B. Eosomichelinoceras borealis sp. nov., FMNH-P30279, holotype, from bed PO 123.3. C. Bactroceras boliviensis Aubrechtová, 2015, FMNH-P30232, from bed PO 131, conch section with nearly cyclic spacing of transverse striae. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBFFFB8FDFB7816FBB67907.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793466/files/figure.png	https://doi.org/10.5281/zenodo.5793466	Fig. 14. Diagrams of angle of expansion, relative chamber length, and relative position of siphuncle of Ethanoceras solitudines gen. et sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1, for details of measurements.	Fig. 14. Diagrams of angle of expansion, relative chamber length, and relative position of siphuncle of Ethanoceras solitudines gen. et sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1, for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBFFFB8FDFB7816FBB67907.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793468/files/figure.png	https://doi.org/10.5281/zenodo.5793468	Fig. 15. Median sections of phragmocones of Ethanoceras solitudines gen. et sp. nov. from from bed PO 123.3, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Specimen FMNH-P30394. B. Specimen FMNH-P30406. C. Specimen FMNH-P30395, oblique section roughly dorsal-ventrally oriented with ventral side directed toward the left. Scale bar = 1 mm for all figures.	Fig. 15. Median sections of phragmocones of Ethanoceras solitudines gen. et sp. nov. from from bed PO 123.3, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Specimen FMNH-P30394. B. Specimen FMNH-P30406. C. Specimen FMNH-P30395, oblique section roughly dorsal-ventrally oriented with ventral side directed toward the left. Scale bar = 1 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBFFFB8FDFB7816FBB67907.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793472/files/figure.png	https://doi.org/10.5281/zenodo.5793472	Fig. 16. Reconstruction and interpretation of details of connecting ring and septal necks in rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30406, see Fig. 15B.B. Svalbardoceras skua gen. et sp. nov., FMNH-P30274, see Fig. 23F. C–D. Svalbardoceras sterna gen. et. sp. nov., note variability of septal neck shape, which is interpreted as an effect of poor preservation. C. Specimen, FMNH-P30368, see Fig. 23G. D. Specimen, FMNH-P30371, see Fig. 23E. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	Fig. 16. Reconstruction and interpretation of details of connecting ring and septal necks in rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30406, see Fig. 15B.B. Svalbardoceras skua gen. et sp. nov., FMNH-P30274, see Fig. 23F. C–D. Svalbardoceras sterna gen. et. sp. nov., note variability of septal neck shape, which is interpreted as an effect of poor preservation. C. Specimen, FMNH-P30368, see Fig. 23G. D. Specimen, FMNH-P30371, see Fig. 23E. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBBFFB7FDF07C5CFCE87827.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794313/files/figure.png	https://doi.org/10.5281/zenodo.5794313	Fig. 17 (previous page). Rioceratid and orthocerid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A-C. Eosomichelinoceras borealis sp. nov., from bed PO 123.3. A. Specimen FMNH-P30278, lateral view with ventral, prosiphuncular side toward left.B. Specimen FMNH-P30279, lateral view with ventral, prosiphuncular side toward left. C. Specimen FMNH-20288, holotype, ventral view. D–F, I. Hinlopoceras tempestatis gen. et sp. nov., from bed PO 07. D. Specimen FMNH-P30359, lateral view with ventral, prosiphuncular side toward right.E. Specimen FMNH-30479, adult(?) body chamber, ventral view, prosiphuncular side.F. Specimen FMNH-P30362, strongly annulated fragment of body chamber. G–H, J. Hinlopoceras venti gen. et sp. nov. G. Specimen FMNH-P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. H. Specimen FMNH-P30266, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward right. I. Specimen FMNH-P30360; note the nearly smooth adapical part of the fragment. J. Specimen FMNH-P30267, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward left. Scale bar = 10 mm for all figures.	Fig. 17 (previous page). Rioceratid and orthocerid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A-C. Eosomichelinoceras borealis sp. nov., from bed PO 123.3. A. Specimen FMNH-P30278, lateral view with ventral, prosiphuncular side toward left.B. Specimen FMNH-P30279, lateral view with ventral, prosiphuncular side toward left. C. Specimen FMNH-20288, holotype, ventral view. D–F, I. Hinlopoceras tempestatis gen. et sp. nov., from bed PO 07. D. Specimen FMNH-P30359, lateral view with ventral, prosiphuncular side toward right.E. Specimen FMNH-30479, adult(?) body chamber, ventral view, prosiphuncular side.F. Specimen FMNH-P30362, strongly annulated fragment of body chamber. G–H, J. Hinlopoceras venti gen. et sp. nov. G. Specimen FMNH-P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. H. Specimen FMNH-P30266, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward right. I. Specimen FMNH-P30360; note the nearly smooth adapical part of the fragment. J. Specimen FMNH-P30267, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward left. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBBFFB7FDF07C5CFCE87827.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793474/files/figure.png	https://doi.org/10.5281/zenodo.5793474	Fig. 18. Diagrams of relative conch width and angles of expansion of species of Hinlopoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 18. Diagrams of relative conch width and angles of expansion of species of Hinlopoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFBBFFB7FDF07C5CFCE87827.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793478/files/figure.png	https://doi.org/10.5281/zenodo.5793478	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB5FFB2FD9A7D7EFB607823.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794313/files/figure.png	https://doi.org/10.5281/zenodo.5794313	Fig. 17 (previous page). Rioceratid and orthocerid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A-C. Eosomichelinoceras borealis sp. nov., from bed PO 123.3. A. Specimen FMNH-P30278, lateral view with ventral, prosiphuncular side toward left.B. Specimen FMNH-P30279, lateral view with ventral, prosiphuncular side toward left. C. Specimen FMNH-20288, holotype, ventral view. D–F, I. Hinlopoceras tempestatis gen. et sp. nov., from bed PO 07. D. Specimen FMNH-P30359, lateral view with ventral, prosiphuncular side toward right.E. Specimen FMNH-30479, adult(?) body chamber, ventral view, prosiphuncular side.F. Specimen FMNH-P30362, strongly annulated fragment of body chamber. G–H, J. Hinlopoceras venti gen. et sp. nov. G. Specimen FMNH-P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. H. Specimen FMNH-P30266, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward right. I. Specimen FMNH-P30360; note the nearly smooth adapical part of the fragment. J. Specimen FMNH-P30267, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward left. Scale bar = 10 mm for all figures.	Fig. 17 (previous page). Rioceratid and orthocerid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A-C. Eosomichelinoceras borealis sp. nov., from bed PO 123.3. A. Specimen FMNH-P30278, lateral view with ventral, prosiphuncular side toward left.B. Specimen FMNH-P30279, lateral view with ventral, prosiphuncular side toward left. C. Specimen FMNH-20288, holotype, ventral view. D–F, I. Hinlopoceras tempestatis gen. et sp. nov., from bed PO 07. D. Specimen FMNH-P30359, lateral view with ventral, prosiphuncular side toward right.E. Specimen FMNH-30479, adult(?) body chamber, ventral view, prosiphuncular side.F. Specimen FMNH-P30362, strongly annulated fragment of body chamber. G–H, J. Hinlopoceras venti gen. et sp. nov. G. Specimen FMNH-P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. H. Specimen FMNH-P30266, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward right. I. Specimen FMNH-P30360; note the nearly smooth adapical part of the fragment. J. Specimen FMNH-P30267, from bed PO 7.5, lateral view with ventral, prosiphuncular side toward left. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB5FFB2FD9A7D7EFB607823.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793474/files/figure.png	https://doi.org/10.5281/zenodo.5793474	Fig. 18. Diagrams of relative conch width and angles of expansion of species of Hinlopoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 18. Diagrams of relative conch width and angles of expansion of species of Hinlopoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB5FFB2FD9A7D7EFB607823.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793478/files/figure.png	https://doi.org/10.5281/zenodo.5793478	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB1FFB1FDEE7E79FC857B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794307/files/figure.png	https://doi.org/10.5281/zenodo.5794307	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB1FFB1FDEE7E79FC857B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793472/files/figure.png	https://doi.org/10.5281/zenodo.5793472	Fig. 16. Reconstruction and interpretation of details of connecting ring and septal necks in rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30406, see Fig. 15B.B. Svalbardoceras skua gen. et sp. nov., FMNH-P30274, see Fig. 23F. C–D. Svalbardoceras sterna gen. et. sp. nov., note variability of septal neck shape, which is interpreted as an effect of poor preservation. C. Specimen, FMNH-P30368, see Fig. 23G. D. Specimen, FMNH-P30371, see Fig. 23E. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	Fig. 16. Reconstruction and interpretation of details of connecting ring and septal necks in rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30406, see Fig. 15B.B. Svalbardoceras skua gen. et sp. nov., FMNH-P30274, see Fig. 23F. C–D. Svalbardoceras sterna gen. et. sp. nov., note variability of septal neck shape, which is interpreted as an effect of poor preservation. C. Specimen, FMNH-P30368, see Fig. 23G. D. Specimen, FMNH-P30371, see Fig. 23E. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB1FFB1FDEE7E79FC857B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793478/files/figure.png	https://doi.org/10.5281/zenodo.5793478	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB1FFB1FDEE7E79FC857B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793480/files/figure.png	https://doi.org/10.5281/zenodo.5793480	Fig. 20.Diagrams of relative conch width and angles of expansion of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 20.Diagrams of relative conch width and angles of expansion of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB1FFB1FDEE7E79FC857B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793484/files/figure.png	https://doi.org/10.5281/zenodo.5793484	Fig. 21. Diagrams of relative chamber length and relative siphuncular diameter of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 21. Diagrams of relative chamber length and relative siphuncular diameter of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB1FFB1FDEE7E79FC857B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793488/files/figure.png	https://doi.org/10.5281/zenodo.5793488	Fig. 22. Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–D. Svalbardoceras skua gen. et sp. nov. from bed PO 123.3. A. Specimen FMNH-P30277, lateral view, venter, prosiphuncular side toward the right. B. Specimen FMNH-P30272, holotype, lateral view, venter, prosiphuncular side toward the left. C. Specimen FMNH-P30276, lateral view of adult (?), body chamber, with venter, prosiphuncular side toward the left. D. Specimen FMNH-P30263, lateral view of a fragmentary body chamber, with venter, prosiphuncular side toward the left. E–G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. E. Specimen FMNH-P30379. F. Specimen FMNH-P30373, lateral view with venter, prosiphuncular side toward the right. G. Specimen FMNH-P30368, holotype, lateral view with venter, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	Fig. 22. Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–D. Svalbardoceras skua gen. et sp. nov. from bed PO 123.3. A. Specimen FMNH-P30277, lateral view, venter, prosiphuncular side toward the right. B. Specimen FMNH-P30272, holotype, lateral view, venter, prosiphuncular side toward the left. C. Specimen FMNH-P30276, lateral view of adult (?), body chamber, with venter, prosiphuncular side toward the left. D. Specimen FMNH-P30263, lateral view of a fragmentary body chamber, with venter, prosiphuncular side toward the left. E–G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. E. Specimen FMNH-P30379. F. Specimen FMNH-P30373, lateral view with venter, prosiphuncular side toward the right. G. Specimen FMNH-P30368, holotype, lateral view with venter, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB1FFB1FDEE7E79FC857B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793492/files/figure.png	https://doi.org/10.5281/zenodo.5793492	Fig. 23. Median sections of phragmocones of Svalbardoceras gen. nov., from Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A, C, E, G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. A, E. Specimen FMNH-P30371. B, D, F. Svalbardoceras skua gen. et sp. nov., from bed PO 123.3. B. Specimen FMNH-P30275. C, G. Specimen FMNH-P30368, holotype. D, F. Specimen FMNH-P30471, oblique sagittal section through siphuncle, distance from conch margin is cutting effect. Scale bars: A–D = 5 mm; E–G = 1 mm.	Fig. 23. Median sections of phragmocones of Svalbardoceras gen. nov., from Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A, C, E, G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. A, E. Specimen FMNH-P30371. B, D, F. Svalbardoceras skua gen. et sp. nov., from bed PO 123.3. B. Specimen FMNH-P30275. C, G. Specimen FMNH-P30368, holotype. D, F. Specimen FMNH-P30471, oblique sagittal section through siphuncle, distance from conch margin is cutting effect. Scale bars: A–D = 5 mm; E–G = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB3FF8EFD977E79FC937E6D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793472/files/figure.png	https://doi.org/10.5281/zenodo.5793472	Fig. 16. Reconstruction and interpretation of details of connecting ring and septal necks in rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30406, see Fig. 15B.B. Svalbardoceras skua gen. et sp. nov., FMNH-P30274, see Fig. 23F. C–D. Svalbardoceras sterna gen. et. sp. nov., note variability of septal neck shape, which is interpreted as an effect of poor preservation. C. Specimen, FMNH-P30368, see Fig. 23G. D. Specimen, FMNH-P30371, see Fig. 23E. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	Fig. 16. Reconstruction and interpretation of details of connecting ring and septal necks in rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30406, see Fig. 15B.B. Svalbardoceras skua gen. et sp. nov., FMNH-P30274, see Fig. 23F. C–D. Svalbardoceras sterna gen. et. sp. nov., note variability of septal neck shape, which is interpreted as an effect of poor preservation. C. Specimen, FMNH-P30368, see Fig. 23G. D. Specimen, FMNH-P30371, see Fig. 23E. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB3FF8EFD977E79FC937E6D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793478/files/figure.png	https://doi.org/10.5281/zenodo.5793478	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	Fig. 19. Details of the conch surface of rioceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Hinlopoceras venti gen. et sp. nov., FMNH- P30262, from bed PO 07, lateral view with ventral, prosiphuncular side toward left. B. Hinlopoceras tempestatis gen. et sp. nov., FMNH-P30359, from bed PO 07, lateral view with ventral, prosiphuncular side toward right. C. Svalbardoceras skua gen. et sp. nov., FMNH-P30408, from bed PO 123.3. D. Svalbardoceras sterna gen. et sp. nov., FMNH-P30373, from bed PO 7.5. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB3FF8EFD977E79FC937E6D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793480/files/figure.png	https://doi.org/10.5281/zenodo.5793480	Fig. 20.Diagrams of relative conch width and angles of expansion of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 20.Diagrams of relative conch width and angles of expansion of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB3FF8EFD977E79FC937E6D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793484/files/figure.png	https://doi.org/10.5281/zenodo.5793484	Fig. 21. Diagrams of relative chamber length and relative siphuncular diameter of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 21. Diagrams of relative chamber length and relative siphuncular diameter of species of Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB3FF8EFD977E79FC937E6D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793488/files/figure.png	https://doi.org/10.5281/zenodo.5793488	Fig. 22. Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–D. Svalbardoceras skua gen. et sp. nov. from bed PO 123.3. A. Specimen FMNH-P30277, lateral view, venter, prosiphuncular side toward the right. B. Specimen FMNH-P30272, holotype, lateral view, venter, prosiphuncular side toward the left. C. Specimen FMNH-P30276, lateral view of adult (?), body chamber, with venter, prosiphuncular side toward the left. D. Specimen FMNH-P30263, lateral view of a fragmentary body chamber, with venter, prosiphuncular side toward the left. E–G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. E. Specimen FMNH-P30379. F. Specimen FMNH-P30373, lateral view with venter, prosiphuncular side toward the right. G. Specimen FMNH-P30368, holotype, lateral view with venter, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	Fig. 22. Svalbardoceras gen. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–D. Svalbardoceras skua gen. et sp. nov. from bed PO 123.3. A. Specimen FMNH-P30277, lateral view, venter, prosiphuncular side toward the right. B. Specimen FMNH-P30272, holotype, lateral view, venter, prosiphuncular side toward the left. C. Specimen FMNH-P30276, lateral view of adult (?), body chamber, with venter, prosiphuncular side toward the left. D. Specimen FMNH-P30263, lateral view of a fragmentary body chamber, with venter, prosiphuncular side toward the left. E–G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. E. Specimen FMNH-P30379. F. Specimen FMNH-P30373, lateral view with venter, prosiphuncular side toward the right. G. Specimen FMNH-P30368, holotype, lateral view with venter, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB3FF8EFD977E79FC937E6D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793492/files/figure.png	https://doi.org/10.5281/zenodo.5793492	Fig. 23. Median sections of phragmocones of Svalbardoceras gen. nov., from Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A, C, E, G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. A, E. Specimen FMNH-P30371. B, D, F. Svalbardoceras skua gen. et sp. nov., from bed PO 123.3. B. Specimen FMNH-P30275. C, G. Specimen FMNH-P30368, holotype. D, F. Specimen FMNH-P30471, oblique sagittal section through siphuncle, distance from conch margin is cutting effect. Scale bars: A–D = 5 mm; E–G = 1 mm.	Fig. 23. Median sections of phragmocones of Svalbardoceras gen. nov., from Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A, C, E, G. Svalbardoceras sterna gen. et sp. nov., from bed PO 7.5. A, E. Specimen FMNH-P30371. B, D, F. Svalbardoceras skua gen. et sp. nov., from bed PO 123.3. B. Specimen FMNH-P30275. C, G. Specimen FMNH-P30368, holotype. D, F. Specimen FMNH-P30471, oblique sagittal section through siphuncle, distance from conch margin is cutting effect. Scale bars: A–D = 5 mm; E–G = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFB3FF8EFD977E79FC937E6D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793512/files/figure.png	https://doi.org/10.5281/zenodo.5793512	Fig. 29. Median sections of phragmocones of Bactroceras Holm, 1898. A, C–D. Bactroceras fluvii sp. nov., from Profilbekken river basin, locality PR-phosphatic. A. Specimen FMNH-P30159, with adapical siphuncular segment, taphonomically slightly distorted.B. Bactroceras boliviensisAubrechtová, 2015, FMNH-P30176 from bed PO 131, extreme apical part. C–D. Specimen FMNH-P30177, holotype. C. Details of the protoconch. D. Apical part with transition toward juvenile growth stages; note the slightly expanded siphuncular segments. Scale bars: A = 5 mm; B–C = 1 mm; D = 2 mm.	Fig. 29. Median sections of phragmocones of Bactroceras Holm, 1898. A, C–D. Bactroceras fluvii sp. nov., from Profilbekken river basin, locality PR-phosphatic. A. Specimen FMNH-P30159, with adapical siphuncular segment, taphonomically slightly distorted.B. Bactroceras boliviensisAubrechtová, 2015, FMNH-P30176 from bed PO 131, extreme apical part. C–D. Specimen FMNH-P30177, holotype. C. Details of the protoconch. D. Apical part with transition toward juvenile growth stages; note the slightly expanded siphuncular segments. Scale bars: A = 5 mm; B–C = 1 mm; D = 2 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794307/files/figure.png	https://doi.org/10.5281/zenodo.5794307	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793460/files/figure.png	https://doi.org/10.5281/zenodo.5793460	Fig. 13. Details of the conch surface of transversally ornamented orthocones from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30383, holotype, from bed PO 131. B. Eosomichelinoceras borealis sp. nov., FMNH-P30279, holotype, from bed PO 123.3. C. Bactroceras boliviensis Aubrechtová, 2015, FMNH-P30232, from bed PO 131, conch section with nearly cyclic spacing of transverse striae. Scale bar = 10 mm for all figures.	Fig. 13. Details of the conch surface of transversally ornamented orthocones from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30383, holotype, from bed PO 131. B. Eosomichelinoceras borealis sp. nov., FMNH-P30279, holotype, from bed PO 123.3. C. Bactroceras boliviensis Aubrechtová, 2015, FMNH-P30232, from bed PO 131, conch section with nearly cyclic spacing of transverse striae. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793498/files/figure.png	https://doi.org/10.5281/zenodo.5793498	Fig. 24. Diagrams of spacing of ornamentation, angle of expansion, and relative chamber length of Bactroceras boliviensis Aubrechtová, 2015 from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Data of type specimens from Aubrechtová (2015). See Supp. file 1 for details of measurements.	Fig. 24. Diagrams of spacing of ornamentation, angle of expansion, and relative chamber length of Bactroceras boliviensis Aubrechtová, 2015 from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Data of type specimens from Aubrechtová (2015). See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793500/files/figure.png	https://doi.org/10.5281/zenodo.5793500	Fig. 25. Bactroceras boliviensis Aubrechtová, 2015, from bed PO 131, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Specimen FMNH-P30430, lateral view of body chamber with dorsomyarian muscle impression at base ventral, prosiphuncular side toward the left. B. Specimen FMNH-P30231, view of ventral, prosiphuncular side. C. Specimen FMNH-P30248, lateral view of specimen with partly cyclic spacing of ornamentation; ventral, prosiphuncular side toward the right. D. Specimen FMNH-P30215, with fine transverse ornamentation; ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	Fig. 25. Bactroceras boliviensis Aubrechtová, 2015, from bed PO 131, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Specimen FMNH-P30430, lateral view of body chamber with dorsomyarian muscle impression at base ventral, prosiphuncular side toward the left. B. Specimen FMNH-P30231, view of ventral, prosiphuncular side. C. Specimen FMNH-P30248, lateral view of specimen with partly cyclic spacing of ornamentation; ventral, prosiphuncular side toward the right. D. Specimen FMNH-P30215, with fine transverse ornamentation; ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793502/files/figure.png	https://doi.org/10.5281/zenodo.5793502	Fig. 26. Diagrams of relative siphuncular diameter and relative siphuncular distance of Bactroceras boliviensis Aubrechtová, 2015, from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Data of type specimen from Aubrechtová (2015). See Supp. file 1 for details of measurements.	Fig. 26. Diagrams of relative siphuncular diameter and relative siphuncular distance of Bactroceras boliviensis Aubrechtová, 2015, from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Data of type specimen from Aubrechtová (2015). See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793506/files/figure.png	https://doi.org/10.5281/zenodo.5793506	Fig. 27. Median sections of phragmocones of Bactroceras boliviensis Aubrechtová, 2015, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Note conical endisiphuncular lining in A–D. A. Specimen FMNH-P30215, from bed PO 131. B. Specimen FMNH-P30259, from bed PO 7.5. C–D. Specimen FMNH-P30243, from bed PO 7.5. E. Specimen FMNH-P30383, from bed PO 131. Scale bars: A–C, E = 5 mm; D = 1 mm.	Fig. 27. Median sections of phragmocones of Bactroceras boliviensis Aubrechtová, 2015, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Note conical endisiphuncular lining in A–D. A. Specimen FMNH-P30215, from bed PO 131. B. Specimen FMNH-P30259, from bed PO 7.5. C–D. Specimen FMNH-P30243, from bed PO 7.5. E. Specimen FMNH-P30383, from bed PO 131. Scale bars: A–C, E = 5 mm; D = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793508/files/figure.png	https://doi.org/10.5281/zenodo.5793508	Fig. 28.Reconstructionand interpretation of detailsof connecting ring and septal necks.A–B. Bactroceras boliviensisAubrechtová, 2015.A. Specimen FMNH-P30243, see Fig. 27D.B. Specimen FMNH-P30215, see Fig.29A.C. Eosomichelinoceras borealis sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, specimen FMNH-P30305, see Fig. 33C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: endosiphuncular deposits. Without scale.	Fig. 28.Reconstructionand interpretation of detailsof connecting ring and septal necks.A–B. Bactroceras boliviensisAubrechtová, 2015.A. Specimen FMNH-P30243, see Fig. 27D.B. Specimen FMNH-P30215, see Fig.29A.C. Eosomichelinoceras borealis sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, specimen FMNH-P30305, see Fig. 33C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: endosiphuncular deposits. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF8FFF87FDCD7BB9FCF378C8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793512/files/figure.png	https://doi.org/10.5281/zenodo.5793512	Fig. 29. Median sections of phragmocones of Bactroceras Holm, 1898. A, C–D. Bactroceras fluvii sp. nov., from Profilbekken river basin, locality PR-phosphatic. A. Specimen FMNH-P30159, with adapical siphuncular segment, taphonomically slightly distorted.B. Bactroceras boliviensisAubrechtová, 2015, FMNH-P30176 from bed PO 131, extreme apical part. C–D. Specimen FMNH-P30177, holotype. C. Details of the protoconch. D. Apical part with transition toward juvenile growth stages; note the slightly expanded siphuncular segments. Scale bars: A = 5 mm; B–C = 1 mm; D = 2 mm.	Fig. 29. Median sections of phragmocones of Bactroceras Holm, 1898. A, C–D. Bactroceras fluvii sp. nov., from Profilbekken river basin, locality PR-phosphatic. A. Specimen FMNH-P30159, with adapical siphuncular segment, taphonomically slightly distorted.B. Bactroceras boliviensisAubrechtová, 2015, FMNH-P30176 from bed PO 131, extreme apical part. C–D. Specimen FMNH-P30177, holotype. C. Details of the protoconch. D. Apical part with transition toward juvenile growth stages; note the slightly expanded siphuncular segments. Scale bars: A = 5 mm; B–C = 1 mm; D = 2 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF85FF85FDA87DC0FACA7841.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794307/files/figure.png	https://doi.org/10.5281/zenodo.5794307	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF85FF85FDA87DC0FACA7841.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793512/files/figure.png	https://doi.org/10.5281/zenodo.5793512	Fig. 29. Median sections of phragmocones of Bactroceras Holm, 1898. A, C–D. Bactroceras fluvii sp. nov., from Profilbekken river basin, locality PR-phosphatic. A. Specimen FMNH-P30159, with adapical siphuncular segment, taphonomically slightly distorted.B. Bactroceras boliviensisAubrechtová, 2015, FMNH-P30176 from bed PO 131, extreme apical part. C–D. Specimen FMNH-P30177, holotype. C. Details of the protoconch. D. Apical part with transition toward juvenile growth stages; note the slightly expanded siphuncular segments. Scale bars: A = 5 mm; B–C = 1 mm; D = 2 mm.	Fig. 29. Median sections of phragmocones of Bactroceras Holm, 1898. A, C–D. Bactroceras fluvii sp. nov., from Profilbekken river basin, locality PR-phosphatic. A. Specimen FMNH-P30159, with adapical siphuncular segment, taphonomically slightly distorted.B. Bactroceras boliviensisAubrechtová, 2015, FMNH-P30176 from bed PO 131, extreme apical part. C–D. Specimen FMNH-P30177, holotype. C. Details of the protoconch. D. Apical part with transition toward juvenile growth stages; note the slightly expanded siphuncular segments. Scale bars: A = 5 mm; B–C = 1 mm; D = 2 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF85FF85FDA87DC0FACA7841.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793516/files/figure.png	https://doi.org/10.5281/zenodo.5793516	Fig. 30. Diagrams of relative angle of expansion, relative chamber length, and relative siphuncular diameter of Bactroceras fluvii sp. nov., uppermost Olenidsletta Member, V3 trilobite zone, Dapingian, adjacent to Hinlopenstretet, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 30. Diagrams of relative angle of expansion, relative chamber length, and relative siphuncular diameter of Bactroceras fluvii sp. nov., uppermost Olenidsletta Member, V3 trilobite zone, Dapingian, adjacent to Hinlopenstretet, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF87FF82FD49798DFBF4789A.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793448/files/figure.png	https://doi.org/10.5281/zenodo.5793448	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF80FF83FD497C31FD057B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794307/files/figure.png	https://doi.org/10.5281/zenodo.5794307	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF80FF83FD497C31FD057B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793520/files/figure.png	https://doi.org/10.5281/zenodo.5793520	Fig. 31. Median section of details of septal necks and siphuncle of cyptendoceratids from Olenidsletta Member, adjacent to Hinlopenstretet, Spitsbergen. A–B. Cyptendoceratid gen. et sp. indet., FMNH-P30431 from bed PO 131, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Dorsal side directed toward left. A. General view of the siphuncle. Scale bar = 2 mm. B. Details of dorsal side of connecting ring. Scale bar = 1 mm. C. Cyptendoceras sp. B, FMNH-P30166 from Profilbekken river basin, locality PR-phosphatic, uppermost Olenidsletta Member, V3 trilobite zone, Dapingian. Scale bar = 5 mm.	Fig. 31. Median section of details of septal necks and siphuncle of cyptendoceratids from Olenidsletta Member, adjacent to Hinlopenstretet, Spitsbergen. A–B. Cyptendoceratid gen. et sp. indet., FMNH-P30431 from bed PO 131, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Dorsal side directed toward left. A. General view of the siphuncle. Scale bar = 2 mm. B. Details of dorsal side of connecting ring. Scale bar = 1 mm. C. Cyptendoceras sp. B, FMNH-P30166 from Profilbekken river basin, locality PR-phosphatic, uppermost Olenidsletta Member, V3 trilobite zone, Dapingian. Scale bar = 5 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF83FF9FFDB37E1CFAA97BB0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793522/files/figure.png	https://doi.org/10.5281/zenodo.5793522	Fig. 32. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Catoraphiceras sp., FMNH-P30425, dorsal side of the connecting ring, see Fig. 10A. B. Cyptendoceratid gen. et sp. indet., FMNH-P30431, see Fig. 31B. C. Hemichoanella occulta sp. nov., FMNH-P30420, from bed PO 131, dorsal side of the connecting ring, see Fig. 36B. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	Fig. 32. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Catoraphiceras sp., FMNH-P30425, dorsal side of the connecting ring, see Fig. 10A. B. Cyptendoceratid gen. et sp. indet., FMNH-P30431, see Fig. 31B. C. Hemichoanella occulta sp. nov., FMNH-P30420, from bed PO 131, dorsal side of the connecting ring, see Fig. 36B. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF83FF9FFDB37E1CFAA97BB0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793524/files/figure.png	https://doi.org/10.5281/zenodo.5793524	Fig. 33. Median sections of phragmocones. A–B. Hemichoanella occulta sp. nov., from bed PO 131. C–E. Eosomichelinoceras borealis sp. nov., from bed PO 123.3, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Specimen FMNH-P30420, holotype. C. Specimen FMNH-P30305. D. Specimen FMNH-30288. E. Specimen FMNH-30284. Scale bars: A–B, E = 5 mm; C–D = 1 mm.	Fig. 33. Median sections of phragmocones. A–B. Hemichoanella occulta sp. nov., from bed PO 131. C–E. Eosomichelinoceras borealis sp. nov., from bed PO 123.3, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Specimen FMNH-P30420, holotype. C. Specimen FMNH-P30305. D. Specimen FMNH-30288. E. Specimen FMNH-30284. Scale bars: A–B, E = 5 mm; C–D = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9DFF9FFD9B7EEEFEB67F35.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793448/files/figure.png	https://doi.org/10.5281/zenodo.5793448	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9DFF9FFD9B7EEEFEB67F35.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793520/files/figure.png	https://doi.org/10.5281/zenodo.5793520	Fig. 31. Median section of details of septal necks and siphuncle of cyptendoceratids from Olenidsletta Member, adjacent to Hinlopenstretet, Spitsbergen. A–B. Cyptendoceratid gen. et sp. indet., FMNH-P30431 from bed PO 131, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Dorsal side directed toward left. A. General view of the siphuncle. Scale bar = 2 mm. B. Details of dorsal side of connecting ring. Scale bar = 1 mm. C. Cyptendoceras sp. B, FMNH-P30166 from Profilbekken river basin, locality PR-phosphatic, uppermost Olenidsletta Member, V3 trilobite zone, Dapingian. Scale bar = 5 mm.	Fig. 31. Median section of details of septal necks and siphuncle of cyptendoceratids from Olenidsletta Member, adjacent to Hinlopenstretet, Spitsbergen. A–B. Cyptendoceratid gen. et sp. indet., FMNH-P30431 from bed PO 131, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Dorsal side directed toward left. A. General view of the siphuncle. Scale bar = 2 mm. B. Details of dorsal side of connecting ring. Scale bar = 1 mm. C. Cyptendoceras sp. B, FMNH-P30166 from Profilbekken river basin, locality PR-phosphatic, uppermost Olenidsletta Member, V3 trilobite zone, Dapingian. Scale bar = 5 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9DFF9FFD9B7EEEFEB67F35.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793522/files/figure.png	https://doi.org/10.5281/zenodo.5793522	Fig. 32. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Catoraphiceras sp., FMNH-P30425, dorsal side of the connecting ring, see Fig. 10A. B. Cyptendoceratid gen. et sp. indet., FMNH-P30431, see Fig. 31B. C. Hemichoanella occulta sp. nov., FMNH-P30420, from bed PO 131, dorsal side of the connecting ring, see Fig. 36B. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	Fig. 32. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Catoraphiceras sp., FMNH-P30425, dorsal side of the connecting ring, see Fig. 10A. B. Cyptendoceratid gen. et sp. indet., FMNH-P30431, see Fig. 31B. C. Hemichoanella occulta sp. nov., FMNH-P30420, from bed PO 131, dorsal side of the connecting ring, see Fig. 36B. Black: septal neck and septum. Dark grey: connecting ring. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9EFF9DFDEB7D12FD0E791F.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793448/files/figure.png	https://doi.org/10.5281/zenodo.5793448	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9EFF9DFDEB7D12FD0E791F.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793456/files/figure.png	https://doi.org/10.5281/zenodo.5793456	Fig. 11. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, genus and species indet. B, FMNH-P30424, see also Fig. 49A. B. Buttsoceras buldrebreenense sp. nov., FMNH-P30421, holotype, see also Fig. 35A. C. Proterocameroceras vallhallfonnense sp. nov., FMNH-P30429, see also Fig. 10B. Without scale.	Fig. 11. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, genus and species indet. B, FMNH-P30424, see also Fig. 49A. B. Buttsoceras buldrebreenense sp. nov., FMNH-P30421, holotype, see also Fig. 35A. C. Proterocameroceras vallhallfonnense sp. nov., FMNH-P30429, see also Fig. 10B. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9EFF9DFDEB7D12FD0E791F.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793526/files/figure.png	https://doi.org/10.5281/zenodo.5793526	Fig. 34. Diagrams of relative conch width, relative chamber length, and relative siphuncular diameter of Buttsoceras buldrebreenensis sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 34. Diagrams of relative conch width, relative chamber length, and relative siphuncular diameter of Buttsoceras buldrebreenensis sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9EFF9DFDEB7D12FD0E791F.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793530/files/figure.png	https://doi.org/10.5281/zenodo.5793530	Fig. 35. Median sections of phragmocones of Buttsoceras buldrebreenensis sp. nov. from bed PO 131, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Specimen FMNH-P30421, heavily recrystallized phragmocone, ventral side toward the left, see Fig. 11B for interpretation. B–C. Specimen FMNH-P30430, septa are only partly preserved. C. Detail of B with loxochoanitic septal neck and connecting ring relatively well preserved. Scale bars: A–B = 5 mm; C = 1 mm.	Fig. 35. Median sections of phragmocones of Buttsoceras buldrebreenensis sp. nov. from bed PO 131, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Specimen FMNH-P30421, heavily recrystallized phragmocone, ventral side toward the left, see Fig. 11B for interpretation. B–C. Specimen FMNH-P30430, septa are only partly preserved. C. Detail of B with loxochoanitic septal neck and connecting ring relatively well preserved. Scale bars: A–B = 5 mm; C = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF98FF99FDF67D11FCC27827.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793532/files/figure.png	https://doi.org/10.5281/zenodo.5793532	Fig. 36. Protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Protocycloceras sp. FMNH-P30417, lateral view, from bed PO 123.3. B–C, E–H. Protocycloceras minor sp. nov. B, E–F. Specimen FMNH-P30411, holotype, from bed PO 131. B. Ventral view, prosiphuncular side. C. Specimen FMNH-P30412, from bed PO 131, with details of ornamentation well preserved. D. Catoraphiceras sp., FMNH-P30425, from bed PO 131, oblique lateral view. E. Adoral view of holotype with septal perforation visible. F. Fragment of holotype with chamber spacing G. Specimen FMNH-P30413 showing the shape of the septal curvature, dorsal view, antisiphuncular side. H. Specimen FMNH-P30410, with conch surface well preserved. I. Protocycloceras lamarcki (Billings, 1859), FMNH-P30418, from bed PO 04, with poorly preserved conch surface. Scale bars = 5 mm.	Fig. 36. Protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Protocycloceras sp. FMNH-P30417, lateral view, from bed PO 123.3. B–C, E–H. Protocycloceras minor sp. nov. B, E–F. Specimen FMNH-P30411, holotype, from bed PO 131. B. Ventral view, prosiphuncular side. C. Specimen FMNH-P30412, from bed PO 131, with details of ornamentation well preserved. D. Catoraphiceras sp., FMNH-P30425, from bed PO 131, oblique lateral view. E. Adoral view of holotype with septal perforation visible. F. Fragment of holotype with chamber spacing G. Specimen FMNH-P30413 showing the shape of the septal curvature, dorsal view, antisiphuncular side. H. Specimen FMNH-P30410, with conch surface well preserved. I. Protocycloceras lamarcki (Billings, 1859), FMNH-P30418, from bed PO 04, with poorly preserved conch surface. Scale bars = 5 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF98FF99FDF67D11FCC27827.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793536/files/figure.png	https://doi.org/10.5281/zenodo.5793536	Fig. 37. Longitudinal cross sections of protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Protocycloceras lamarcki (Billings, 1859). A. Specimen FMNH-P30418, approximal dorso-ventral median section with details of heavily recrystallized siphuncle and sepal necks, showing concave siphuncular segments. B. Specimen FMNH-30409, apical fragment of phragmocone with cameral deposits and siphuncle with concave segments and orthochoanitic septal necks. C. Protocycloceras minor sp. nov., FMNH-P30411, holotype, with poorly preserved details; siphuncle with nearly tubular segments and probably short orthochoanitic septal necks. Scale bar = 2 mm for all figures.	Fig. 37. Longitudinal cross sections of protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Protocycloceras lamarcki (Billings, 1859). A. Specimen FMNH-P30418, approximal dorso-ventral median section with details of heavily recrystallized siphuncle and sepal necks, showing concave siphuncular segments. B. Specimen FMNH-30409, apical fragment of phragmocone with cameral deposits and siphuncle with concave segments and orthochoanitic septal necks. C. Protocycloceras minor sp. nov., FMNH-P30411, holotype, with poorly preserved details; siphuncle with nearly tubular segments and probably short orthochoanitic septal necks. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9BFF96FDB67D7EFD117F2E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793532/files/figure.png	https://doi.org/10.5281/zenodo.5793532	Fig. 36. Protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Protocycloceras sp. FMNH-P30417, lateral view, from bed PO 123.3. B–C, E–H. Protocycloceras minor sp. nov. B, E–F. Specimen FMNH-P30411, holotype, from bed PO 131. B. Ventral view, prosiphuncular side. C. Specimen FMNH-P30412, from bed PO 131, with details of ornamentation well preserved. D. Catoraphiceras sp., FMNH-P30425, from bed PO 131, oblique lateral view. E. Adoral view of holotype with septal perforation visible. F. Fragment of holotype with chamber spacing G. Specimen FMNH-P30413 showing the shape of the septal curvature, dorsal view, antisiphuncular side. H. Specimen FMNH-P30410, with conch surface well preserved. I. Protocycloceras lamarcki (Billings, 1859), FMNH-P30418, from bed PO 04, with poorly preserved conch surface. Scale bars = 5 mm.	Fig. 36. Protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Protocycloceras sp. FMNH-P30417, lateral view, from bed PO 123.3. B–C, E–H. Protocycloceras minor sp. nov. B, E–F. Specimen FMNH-P30411, holotype, from bed PO 131. B. Ventral view, prosiphuncular side. C. Specimen FMNH-P30412, from bed PO 131, with details of ornamentation well preserved. D. Catoraphiceras sp., FMNH-P30425, from bed PO 131, oblique lateral view. E. Adoral view of holotype with septal perforation visible. F. Fragment of holotype with chamber spacing G. Specimen FMNH-P30413 showing the shape of the septal curvature, dorsal view, antisiphuncular side. H. Specimen FMNH-P30410, with conch surface well preserved. I. Protocycloceras lamarcki (Billings, 1859), FMNH-P30418, from bed PO 04, with poorly preserved conch surface. Scale bars = 5 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9BFF96FDB67D7EFD117F2E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793536/files/figure.png	https://doi.org/10.5281/zenodo.5793536	Fig. 37. Longitudinal cross sections of protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Protocycloceras lamarcki (Billings, 1859). A. Specimen FMNH-P30418, approximal dorso-ventral median section with details of heavily recrystallized siphuncle and sepal necks, showing concave siphuncular segments. B. Specimen FMNH-30409, apical fragment of phragmocone with cameral deposits and siphuncle with concave segments and orthochoanitic septal necks. C. Protocycloceras minor sp. nov., FMNH-P30411, holotype, with poorly preserved details; siphuncle with nearly tubular segments and probably short orthochoanitic septal necks. Scale bar = 2 mm for all figures.	Fig. 37. Longitudinal cross sections of protocycloceratid cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Protocycloceras lamarcki (Billings, 1859). A. Specimen FMNH-P30418, approximal dorso-ventral median section with details of heavily recrystallized siphuncle and sepal necks, showing concave siphuncular segments. B. Specimen FMNH-30409, apical fragment of phragmocone with cameral deposits and siphuncle with concave segments and orthochoanitic septal necks. C. Protocycloceras minor sp. nov., FMNH-P30411, holotype, with poorly preserved details; siphuncle with nearly tubular segments and probably short orthochoanitic septal necks. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF9BFF96FDB67D7EFD117F2E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793538/files/figure.png	https://doi.org/10.5281/zenodo.5793538	Fig. 38. Diagram of the spacing of the annulation in Protocycloceras minor sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 38. Diagram of the spacing of the annulation in Protocycloceras minor sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF95FF95FDED7B0CFBC47FB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5794307/files/figure.png	https://doi.org/10.5281/zenodo.5794307	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF95FF95FDED7B0CFBC47FB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793460/files/figure.png	https://doi.org/10.5281/zenodo.5793460	Fig. 13. Details of the conch surface of transversally ornamented orthocones from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30383, holotype, from bed PO 131. B. Eosomichelinoceras borealis sp. nov., FMNH-P30279, holotype, from bed PO 123.3. C. Bactroceras boliviensis Aubrechtová, 2015, FMNH-P30232, from bed PO 131, conch section with nearly cyclic spacing of transverse striae. Scale bar = 10 mm for all figures.	Fig. 13. Details of the conch surface of transversally ornamented orthocones from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Ethanoceras solitudines gen. et sp. nov., FMNH-P30383, holotype, from bed PO 131. B. Eosomichelinoceras borealis sp. nov., FMNH-P30279, holotype, from bed PO 123.3. C. Bactroceras boliviensis Aubrechtová, 2015, FMNH-P30232, from bed PO 131, conch section with nearly cyclic spacing of transverse striae. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF95FF95FDED7B0CFBC47FB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793508/files/figure.png	https://doi.org/10.5281/zenodo.5793508	Fig. 28.Reconstructionand interpretation of detailsof connecting ring and septal necks.A–B. Bactroceras boliviensisAubrechtová, 2015.A. Specimen FMNH-P30243, see Fig. 27D.B. Specimen FMNH-P30215, see Fig.29A.C. Eosomichelinoceras borealis sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, specimen FMNH-P30305, see Fig. 33C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: endosiphuncular deposits. Without scale.	Fig. 28.Reconstructionand interpretation of detailsof connecting ring and septal necks.A–B. Bactroceras boliviensisAubrechtová, 2015.A. Specimen FMNH-P30243, see Fig. 27D.B. Specimen FMNH-P30215, see Fig.29A.C. Eosomichelinoceras borealis sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, specimen FMNH-P30305, see Fig. 33C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: endosiphuncular deposits. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF95FF95FDED7B0CFBC47FB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793524/files/figure.png	https://doi.org/10.5281/zenodo.5793524	Fig. 33. Median sections of phragmocones. A–B. Hemichoanella occulta sp. nov., from bed PO 131. C–E. Eosomichelinoceras borealis sp. nov., from bed PO 123.3, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Specimen FMNH-P30420, holotype. C. Specimen FMNH-P30305. D. Specimen FMNH-30288. E. Specimen FMNH-30284. Scale bars: A–B, E = 5 mm; C–D = 1 mm.	Fig. 33. Median sections of phragmocones. A–B. Hemichoanella occulta sp. nov., from bed PO 131. C–E. Eosomichelinoceras borealis sp. nov., from bed PO 123.3, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Specimen FMNH-P30420, holotype. C. Specimen FMNH-P30305. D. Specimen FMNH-30288. E. Specimen FMNH-30284. Scale bars: A–B, E = 5 mm; C–D = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF95FF95FDED7B0CFBC47FB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793544/files/figure.png	https://doi.org/10.5281/zenodo.5793544	Fig. 39. Diagrams of spacing of ornamentation, angle of expansion, and relative chamber length of Eosomichelinoceras borealis gen. et sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 39. Diagrams of spacing of ornamentation, angle of expansion, and relative chamber length of Eosomichelinoceras borealis gen. et sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF95FF95FDED7B0CFBC47FB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793546/files/figure.png	https://doi.org/10.5281/zenodo.5793546	Fig. 40. Diagrams of relative siphuncular diameter and relative siphuncular distance of Eosomichelinoceras borealis gen. et sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	Fig. 40. Diagrams of relative siphuncular diameter and relative siphuncular distance of Eosomichelinoceras borealis gen. et sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF90FF92FDEB7E1CFB797DB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793550/files/figure.png	https://doi.org/10.5281/zenodo.5793550	Fig. 41. Coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. C-D. Cycloplectoceras hinlopense sp. nov., FMNH-P30327, holotype, from bed PO 131. Scale bar = 10 mm for all figures.	Fig. 41. Coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. C-D. Cycloplectoceras hinlopense sp. nov., FMNH-P30327, holotype, from bed PO 131. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF92FFEEFDAA7DA1FCE87B93.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793550/files/figure.png	https://doi.org/10.5281/zenodo.5793550	Fig. 41. Coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. C-D. Cycloplectoceras hinlopense sp. nov., FMNH-P30327, holotype, from bed PO 131. Scale bar = 10 mm for all figures.	Fig. 41. Coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. C-D. Cycloplectoceras hinlopense sp. nov., FMNH-P30327, holotype, from bed PO 131. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF92FFEEFDAA7DA1FCE87B93.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793552/files/figure.png	https://doi.org/10.5281/zenodo.5793552	Fig. 42. Deltoceras beluga sp. nov., FMNH-P30321, holotype, from bed PO 07, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. View from right side. B. Ventral view; note the deep u-shaped hyponomic sinus. C. View from left side. Scale bar = 10 mm.	Fig. 42. Deltoceras beluga sp. nov., FMNH-P30321, holotype, from bed PO 07, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. View from right side. B. Ventral view; note the deep u-shaped hyponomic sinus. C. View from left side. Scale bar = 10 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF92FFEEFDAA7DA1FCE87B93.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793556/files/figure.png	https://doi.org/10.5281/zenodo.5793556	Fig. 43. Diagrams of whorl expansion rate (WER) and whorl width index (WWI) of Deltoceras beluga sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Solid lines connect measurements from individual specimens. Data of type specimens of D. planum Hyatt, 1894 from Ulrich et al. (1942). See Supp. file 2 for details of measurements	Fig. 43. Diagrams of whorl expansion rate (WER) and whorl width index (WWI) of Deltoceras beluga sp. nov., from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. Solid lines connect measurements from individual specimens. Data of type specimens of D. planum Hyatt, 1894 from Ulrich et al. (1942). See Supp. file 2 for details of measurements	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFF92FFEEFDAA7DA1FCE87B93.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793558/files/figure.png	https://doi.org/10.5281/zenodo.5793558	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFECFFEFFDD97D0AFABF7B22.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793560/files/figure.png	https://doi.org/10.5281/zenodo.5793560	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFEEFFEDFD907C7FFD0479C7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793558/files/figure.png	https://doi.org/10.5281/zenodo.5793558	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFEEFFEDFD907C7FFD0479C7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793564/files/figure.png	https://doi.org/10.5281/zenodo.5793564	Fig. 46. Litoceras profilbekkenense sp. nov., FMNH-P30329, holotype, from bed PO 131, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lateral view of left side of fragment of body chamber. B. Ventral view and whorl cross section with siphuncular perforation preserved. C. Lateral view of right side. Scale bar = 10 mm for all figures.	Fig. 46. Litoceras profilbekkenense sp. nov., FMNH-P30329, holotype, from bed PO 131, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lateral view of left side of fragment of body chamber. B. Ventral view and whorl cross section with siphuncular perforation preserved. C. Lateral view of right side. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFEEFFEDFD907C7FFD0479C7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793566/files/figure.png	https://doi.org/10.5281/zenodo.5793566	Fig. 47. Diagrams of whorl expansion rate (WER), whorl width index (WWI), and relative depth of impression zone (IZR) ofTrocholitoceras walcotti Hyatt, 1894,T. latum Ulrichet al., 1942, andLitoceras profilbekkenense sp. nov. Measurements from specimens from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, and from type specimens based on Ulrich et al. (1942). See Supp. file 2 for details of measurements.	Fig. 47. Diagrams of whorl expansion rate (WER), whorl width index (WWI), and relative depth of impression zone (IZR) ofTrocholitoceras walcotti Hyatt, 1894,T. latum Ulrichet al., 1942, andLitoceras profilbekkenense sp. nov. Measurements from specimens from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, and from type specimens based on Ulrich et al. (1942). See Supp. file 2 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE8FFEBFDE97DCEFA8E7EAA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793550/files/figure.png	https://doi.org/10.5281/zenodo.5793550	Fig. 41. Coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. C-D. Cycloplectoceras hinlopense sp. nov., FMNH-P30327, holotype, from bed PO 131. Scale bar = 10 mm for all figures.	Fig. 41. Coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. C-D. Cycloplectoceras hinlopense sp. nov., FMNH-P30327, holotype, from bed PO 131. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE8FFEBFDE97DCEFA8E7EAA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793558/files/figure.png	https://doi.org/10.5281/zenodo.5793558	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE8FFEBFDE97DCEFA8E7EAA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793566/files/figure.png	https://doi.org/10.5281/zenodo.5793566	Fig. 47. Diagrams of whorl expansion rate (WER), whorl width index (WWI), and relative depth of impression zone (IZR) ofTrocholitoceras walcotti Hyatt, 1894,T. latum Ulrichet al., 1942, andLitoceras profilbekkenense sp. nov. Measurements from specimens from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, and from type specimens based on Ulrich et al. (1942). See Supp. file 2 for details of measurements.	Fig. 47. Diagrams of whorl expansion rate (WER), whorl width index (WWI), and relative depth of impression zone (IZR) ofTrocholitoceras walcotti Hyatt, 1894,T. latum Ulrichet al., 1942, andLitoceras profilbekkenense sp. nov. Measurements from specimens from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, and from type specimens based on Ulrich et al. (1942). See Supp. file 2 for details of measurements.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE9FFE9FEB97BE1FDEA795D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793558/files/figure.png	https://doi.org/10.5281/zenodo.5793558	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	Fig. 44. Cross sections of coiled cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen with details of siphuncular position and impression zone of conch. A. Deltoceras beluga sp. nov., FMNH-P30322, from bed PO 07. B. Litoceras profilbekkenense sp. nov, FMNH-P30329, holotype, from bed PO 131, C. Trocholitoceras juvenicostatum Ulrich et al., 1942, FMNH-P30324, from bed PO 131. D. Trocholitoceras walcotti Hyatt, 1894, FMNH-P30328, from bed PO 131. Scale bars = 10 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE9FFE9FEB97BE1FDEA795D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793568/files/figure.png	https://doi.org/10.5281/zenodo.5793568	Fig. 48. Trocholitoceras juvenicostatum Ulrich, Foerste, Miller & Furnish, 1942, from bed PO 131, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Specimen FMNH-P30323. A. Adoral view with siphuncular perforation preserved. B. Lateral view of fragment of body chamber with outer shell and ornamentation partly preserved. C. Specimen FMNH-P30330, lateral view with distinctive ribs. Scale bar = 20 mm for all figures.	Fig. 48. Trocholitoceras juvenicostatum Ulrich, Foerste, Miller & Furnish, 1942, from bed PO 131, Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Specimen FMNH-P30323. A. Adoral view with siphuncular perforation preserved. B. Lateral view of fragment of body chamber with outer shell and ornamentation partly preserved. C. Specimen FMNH-P30330, lateral view with distinctive ribs. Scale bar = 20 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFEBFFE7FE3F7A82FD747BE9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793444/files/figure.png	https://doi.org/10.5281/zenodo.5793444	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFEBFFE7FE3F7A82FD747BE9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793560/files/figure.png	https://doi.org/10.5281/zenodo.5793560	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFEBFFE7FE3F7A82FD747BE9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793572/files/figure.png	https://doi.org/10.5281/zenodo.5793572	Fig. 49. Median sections of phragmocones of cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8, see also Fig. 11A for interpretation. B–C. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. B. Detail with septa and siphuncle preserved, septa are crushed and taphonomically distorted. C. Detail of septal necks and connecting ring, see Fig. 8D for interpretation. Scale bars: A–B = 5 mm; C = 1 mm.	Fig. 49. Median sections of phragmocones of cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8, see also Fig. 11A for interpretation. B–C. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. B. Detail with septa and siphuncle preserved, septa are crushed and taphonomically distorted. C. Detail of septal necks and connecting ring, see Fig. 8D for interpretation. Scale bars: A–B = 5 mm; C = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE5FFE5FDE77B0CFBAF7BB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793432/files/figure.png	https://doi.org/10.5281/zenodo.5793432	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE5FFE5FDE77B0CFBAF7BB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793436/files/figure.png	https://doi.org/10.5281/zenodo.5793436	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE5FFE5FDE77B0CFBAF7BB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793444/files/figure.png	https://doi.org/10.5281/zenodo.5793444	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE5FFE5FDE77B0CFBAF7BB7.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793576/files/figure.png	https://doi.org/10.5281/zenodo.5793576	Fig. 50. Median sections of phragmocones of oncocerids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3, see Fig. 8C for interpretation. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see Fig. 8B for interpretation. Scale bars = 1 mm for both figures.	Fig. 50. Median sections of phragmocones of oncocerids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3, see Fig. 8C for interpretation. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see Fig. 8B for interpretation. Scale bars = 1 mm for both figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE7FFE2FDC8797AFBCC7CBA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793432/files/figure.png	https://doi.org/10.5281/zenodo.5793432	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	Fig. 5. Cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–C. Lawrenceoceras larus sp. nov., FMNH-P30351, holotype, from bed PO 131. A. Lateral view with siphuncle on left side. B. Ventral view, prosiphuncular side. C. Adoral view of septum and septal perforation.D–E. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. D. Lateral view with siphuncle on left side. E. Ventral view, prosiphuncular side. F–G. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. F. Lateral view with siphuncle on left side. G. Ventral view, prosiphuncular side. H–N. Vallhalloceras floweri King & Evans, 1990. H–I. Specimen FMNH-P30337, from bed PO 131. H. Lateral view, siphuncle on right side I. Ventral view, prosiphuncular side. J–L. Specimen FMNH-P30343 from bed PO 123.3, J. Lateral view with siphuncle on left side. K. Ventral view, prosiphuncular side. L. Dorsal view, antisiphuncular side.M–N. Specimen FMNH-P30338 from bed PO 131. M. Lateral view with siphuncle on left side. N. Ventral view, prosiphuncular side. O–Q. Cyclostomiceras profilstrandense sp. nov., specimen FMNH-P30336, from bed PO 123.3. O. Lateral view with siphuncle on left side. P. Ventral view, prosiphuncular side. Q. Dorsal view, antisiphuncular side. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE7FFE2FDC8797AFBCC7CBA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793436/files/figure.png	https://doi.org/10.5281/zenodo.5793436	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	Fig. 6. Median sections of cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, from bed PO 123.3. B. Lawrenceoceras larus sp. nov., FMNH-P30355, paratype, from bed PO 131. C. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, from bed PO 131. D. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3. Scale bar = 5 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE7FFE2FDC8797AFBCC7CBA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793444/files/figure.png	https://doi.org/10.5281/zenodo.5793444	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	Fig. 8. Reconstruction and interpretation of details of connecting ring and septal necks in cyrtoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Lawrenceoceras ebenus sp. nov., FMNH-P30335, holotype, see also Fig. 7B. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see also Fig. 50B. C. Olenidslettoceras farmi gen. et sp. nov.,FMNH-P30334, holotype, see also Fig. 50A.D. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, see also Fig. 49C. Black: septal neck and septum. Dark grey: connecting ring. Light grey: cameral deposits. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE7FFE2FDC8797AFBCC7CBA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793576/files/figure.png	https://doi.org/10.5281/zenodo.5793576	Fig. 50. Median sections of phragmocones of oncocerids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3, see Fig. 8C for interpretation. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see Fig. 8B for interpretation. Scale bars = 1 mm for both figures.	Fig. 50. Median sections of phragmocones of oncocerids from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Olenidslettoceras farmi gen. et sp. nov., FMNH-P30334, holotype, from bed PO 123.3, see Fig. 8C for interpretation. B. Vallhalloceras floweri Evans & King, 1990, FMNH-P30340, see Fig. 8B for interpretation. Scale bars = 1 mm for both figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE7FFE2FDC8797AFBCC7CBA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793424/files/figure.png	https://doi.org/10.5281/zenodo.5793424	Fig. 1. The Profilstranda-Olenidsletta Member (PO) section adjacent to Hinlopenstretet, Ny Friesland, Spitsbergen. A. Map of the outcrop area adjacent to Hinlopenstretet (Basissletta area in the north and the Olenidsletta in the south; inset is Svalbard, with Spitsbergen as its largest island). The river names D, and E, and the promontory name F are the same as in Fortey & Bruton (1973: fig. 1) (modified from Kröger et al. 2017). B. Aspect of the PO section from north-northeast. C. Outcrop situation 07/2016, view from bed PO 3 toward the south with middle and upper part of the Olenidsletta Member in the background.	Fig. 1. The Profilstranda-Olenidsletta Member (PO) section adjacent to Hinlopenstretet, Ny Friesland, Spitsbergen. A. Map of the outcrop area adjacent to Hinlopenstretet (Basissletta area in the north and the Olenidsletta in the south; inset is Svalbard, with Spitsbergen as its largest island). The river names D, and E, and the promontory name F are the same as in Fortey & Bruton (1973: fig. 1) (modified from Kröger et al. 2017). B. Aspect of the PO section from north-northeast. C. Outcrop situation 07/2016, view from bed PO 3 toward the south with middle and upper part of the Olenidsletta Member in the background.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE0FFE3FD527811FC8F7903.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793560/files/figure.png	https://doi.org/10.5281/zenodo.5793560	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE1FFE3FD557C9BFB917DB6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793456/files/figure.png	https://doi.org/10.5281/zenodo.5793456	Fig. 11. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, genus and species indet. B, FMNH-P30424, see also Fig. 49A. B. Buttsoceras buldrebreenense sp. nov., FMNH-P30421, holotype, see also Fig. 35A. C. Proterocameroceras vallhallfonnense sp. nov., FMNH-P30429, see also Fig. 10B. Without scale.	Fig. 11. Reconstruction and interpretation of details of connecting ring and septal necks in orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, genus and species indet. B, FMNH-P30424, see also Fig. 49A. B. Buttsoceras buldrebreenense sp. nov., FMNH-P30421, holotype, see also Fig. 35A. C. Proterocameroceras vallhallfonnense sp. nov., FMNH-P30429, see also Fig. 10B. Without scale.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE1FFE3FD557C9BFB917DB6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793560/files/figure.png	https://doi.org/10.5281/zenodo.5793560	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	Fig. 45. Cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. A. Ventral view, prosiphuncular side. B. Lateral view with ventral, prosiphuncular side toward the left. C–D. Order, gen. et sp. indet. A, FMNH-P30354, from bed PO 131. C. Dorsal (?) view. D. Lateral view, with dorsal (?), antisiphuncular side toward the right. E–F. Estonioceratid gen. et sp. indet.A., FMNH-P30342, from bed PO 7.5. E. Lateral view with ventral, prosiphuncular side toward the right. F. adoral view with preserved siphuncular perforation. G. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8., lateral view with ventral, prosiphuncular side toward the right. Scale bar = 10 mm for all figures.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
5F4487ACFFE1FFE3FD557C9BFB917DB6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5793572/files/figure.png	https://doi.org/10.5281/zenodo.5793572	Fig. 49. Median sections of phragmocones of cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8, see also Fig. 11A for interpretation. B–C. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. B. Detail with septa and siphuncle preserved, septa are crushed and taphonomically distorted. C. Detail of septal necks and connecting ring, see Fig. 8D for interpretation. Scale bars: A–B = 5 mm; C = 1 mm.	Fig. 49. Median sections of phragmocones of cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8, see also Fig. 11A for interpretation. B–C. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. B. Detail with septa and siphuncle preserved, septa are crushed and taphonomically distorted. C. Detail of septal necks and connecting ring, see Fig. 8D for interpretation. Scale bars: A–B = 5 mm; C = 1 mm.	2021-12-20	Kröger, Björn;Pohle, Alexander		Zenodo	biologists	Kröger, Björn;Pohle, Alexander			
