taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
03B3BB0AFFA2AA551E9CF8AAFF05FEDE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5507754/files/figure.png	http://doi.org/10.5281/zenodo.5507754	FIGURE 2. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend.All are SEM images except A, which is a light micrograph. The specimen was collected from the First Member of the Upper Cretaceous Nenjiang Formation in Jilin, northeastern China. A, An external mould of a right valve, holotype NIGP27106. B, The furrows intercalated nodular platform on a growth band near the umbo. C, A reverse image of B, widely spaced radial lirae with intercalated reticulation and puncta, lirae simple or branched. D, Widely spaced furrow with intercalated nodular platform on growth bands near the umbo. E, Radially aligned, discontinuous short ridges or nodules on growth bands in the ventral part of the carapace external mould, and serration along the lower margins of growth lines. F, A reverse image of E, showing the dense radial lirae with intercalated chain-like ornamentation on growth bands in the ventral part of the carapace, growth lines with serrated lower margins. Scale bars are 1 mm in A; 20 µm in B, C; 100 µm in D–F.	FIGURE 2. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend.All are SEM images except A, which is a light micrograph. The specimen was collected from the First Member of the Upper Cretaceous Nenjiang Formation in Jilin, northeastern China. A, An external mould of a right valve, holotype NIGP27106. B, The furrows intercalated nodular platform on a growth band near the umbo. C, A reverse image of B, widely spaced radial lirae with intercalated reticulation and puncta, lirae simple or branched. D, Widely spaced furrow with intercalated nodular platform on growth bands near the umbo. E, Radially aligned, discontinuous short ridges or nodules on growth bands in the ventral part of the carapace external mould, and serration along the lower margins of growth lines. F, A reverse image of E, showing the dense radial lirae with intercalated chain-like ornamentation on growth bands in the ventral part of the carapace, growth lines with serrated lower margins. Scale bars are 1 mm in A; 20 µm in B, C; 100 µm in D–F.	2021-04-29	LI, GANG		Zenodo	biologists	LI, GANG			
03B3BB0AFFA2AA551E9CF8AAFF05FEDE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5507756/files/figure.png	http://doi.org/10.5281/zenodo.5507756	FIGURE 3. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend. All are SEM images. The specimen is from the First Member of the Upper Cretaceous Nenjiang Formation at Ganhe, Oroqen Autonomous Banner of Inner Mongolia, northeastern China. A, An external mould of a right valve, NIGP174748. B, A reverse image showing widely spaced radial lirae with intercalated reticulation and puncta on growth bands near the umbo, lirae simple or branched. C, Widely spaced furrow with intercalated nodules on growth bands in the anterodorsal part of the carapace external mould. D, A reverse image of C, showing widely spaced radial lirae with intercalated reticulation and puncta. E, Sparse nodules along the lower part of each growth band in the anteroventral part of the carapace, growth lines are serrated in the lower margins. F, A reverse image of E, showing almost smooth growth bands with pitted ornament along the lower part of each growth band in the anteroventral part of the carapace. G, Radially aligned discontinuous short ridges on a growth band in the ventral part of the carapace external mould, growth lines with serrated lower margins. H, A reverse image of G, showing thickened radial lirae with intercalated chain-like ornament on growth band in the ventral part of the carapace. Scale bars are 1 mm in A; 10 µm in C, D; 20 µm in B, E–H.	FIGURE 3. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend. All are SEM images. The specimen is from the First Member of the Upper Cretaceous Nenjiang Formation at Ganhe, Oroqen Autonomous Banner of Inner Mongolia, northeastern China. A, An external mould of a right valve, NIGP174748. B, A reverse image showing widely spaced radial lirae with intercalated reticulation and puncta on growth bands near the umbo, lirae simple or branched. C, Widely spaced furrow with intercalated nodules on growth bands in the anterodorsal part of the carapace external mould. D, A reverse image of C, showing widely spaced radial lirae with intercalated reticulation and puncta. E, Sparse nodules along the lower part of each growth band in the anteroventral part of the carapace, growth lines are serrated in the lower margins. F, A reverse image of E, showing almost smooth growth bands with pitted ornament along the lower part of each growth band in the anteroventral part of the carapace. G, Radially aligned discontinuous short ridges on a growth band in the ventral part of the carapace external mould, growth lines with serrated lower margins. H, A reverse image of G, showing thickened radial lirae with intercalated chain-like ornament on growth band in the ventral part of the carapace. Scale bars are 1 mm in A; 10 µm in C, D; 20 µm in B, E–H.	2021-04-29	LI, GANG		Zenodo	biologists	LI, GANG			
03B3BB0AFFA2AA551E9CF8AAFF05FEDE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5507758/files/figure.png	http://doi.org/10.5281/zenodo.5507758	FIGURE 4. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend. All are SEM images of the specimen of Fig. 3A. A, Widely spaced furrows with intercalated nodules on a growth band in the posterodoral part of the carapace external mould. B, A reverse image of A, showing widely spaced radial lirae with intercalated reticulation and puncta on a growth band in the posterodoral part of the carapace. C, Radially aligned nodules on a growth band in the posteroventral part of the carapace external mould. D, A reverse image of C, showing thickened radial lirae with intercalated chain-like ornament on a growth band in the ventral part of the carapace. E, Radially aligned nodules on growth bands in the posteroventral part of the carapace external mould. F, A reverse image of E, showing dense radial lirae with intercalated chain-like ornament on growth bands in the posteroventral part of the carapace. G, Radially aligned discontinuous short ridges or nodules on growth bands in the ventral part of the carapace external mould. H, A reverse image of G, showing dense and thickened radial lirae with intercalated chain-like ornament on growth bands in the ventral part of the carapace. Growth lines with serrated lower margins. Scale bars are 10 µm in A, B; 20 µm in C, D; 100 µm in E–H.	FIGURE 4. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend. All are SEM images of the specimen of Fig. 3A. A, Widely spaced furrows with intercalated nodules on a growth band in the posterodoral part of the carapace external mould. B, A reverse image of A, showing widely spaced radial lirae with intercalated reticulation and puncta on a growth band in the posterodoral part of the carapace. C, Radially aligned nodules on a growth band in the posteroventral part of the carapace external mould. D, A reverse image of C, showing thickened radial lirae with intercalated chain-like ornament on a growth band in the ventral part of the carapace. E, Radially aligned nodules on growth bands in the posteroventral part of the carapace external mould. F, A reverse image of E, showing dense radial lirae with intercalated chain-like ornament on growth bands in the posteroventral part of the carapace. G, Radially aligned discontinuous short ridges or nodules on growth bands in the ventral part of the carapace external mould. H, A reverse image of G, showing dense and thickened radial lirae with intercalated chain-like ornament on growth bands in the ventral part of the carapace. Growth lines with serrated lower margins. Scale bars are 10 µm in A, B; 20 µm in C, D; 100 µm in E–H.	2021-04-29	LI, GANG		Zenodo	biologists	LI, GANG			
03B3BB0AFFA2AA551E9CF8AAFF05FEDE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5507762/files/figure.png	http://doi.org/10.5281/zenodo.5507762	FIGURE 5. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend. All are light micrographs of specimens form the First Member of the Upper Cretaceous Nenjiang Formation of Ganhe, Oroqen Autonomous Banner, Inner Mongolia, northeastern China. A, An external mould of a left valve, NIGP174749. B, A left valve, NIGP174750. C, The left one: a left valve, NIGP174751; the right one: an external mould of a right valve, NIGP174752. D, An external mould of a left valve, NIGP174753. E, An external mould of a right valve, NIGP174754. F, External moulds of articulated two valves, NIGP174755. G, Displace valves, NIGP174756. H, Articulated valves, NIGP174757. Scale bars = 1 mm.	FIGURE 5. Halysestheria biformis Zhang & Chen in Zhang et al., 1976 emend. All are light micrographs of specimens form the First Member of the Upper Cretaceous Nenjiang Formation of Ganhe, Oroqen Autonomous Banner, Inner Mongolia, northeastern China. A, An external mould of a left valve, NIGP174749. B, A left valve, NIGP174750. C, The left one: a left valve, NIGP174751; the right one: an external mould of a right valve, NIGP174752. D, An external mould of a left valve, NIGP174753. E, An external mould of a right valve, NIGP174754. F, External moulds of articulated two valves, NIGP174755. G, Displace valves, NIGP174756. H, Articulated valves, NIGP174757. Scale bars = 1 mm.	2021-04-29	LI, GANG		Zenodo	biologists	LI, GANG			
