taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204789/files/figure.png	https://doi.org/10.5281/zenodo.5204789	Figure 1. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan. Male, 11.5 mm, OMNH-Ar 8541 (left), and female, 11.8 mm, OMNH-Ar 8542 (right), in the nest (mud tube). Photography by Y. Fujiwara.	Figure 1. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan. Male, 11.5 mm, OMNH-Ar 8541 (left), and female, 11.8 mm, OMNH-Ar 8542 (right), in the nest (mud tube). Photography by Y. Fujiwara.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204791/files/figure.png	https://doi.org/10.5281/zenodo.5204791	Figure 2. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, male, 11.5 mm, OMNH-Ar 8541. Lateral view, right gnathopod 2 superimposed reversely. Scale: 1 mm.	Figure 2. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, male, 11.5 mm, OMNH-Ar 8541. Lateral view, right gnathopod 2 superimposed reversely. Scale: 1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204793/files/figure.png	https://doi.org/10.5281/zenodo.5204793	Figure 3. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, male, 11.5 mm, OMNH-Ar 8541. (A) Right antenna 1, medial view; (A1) accessory flagellum of right antenna 1, medial view; (B) left antenna 2, lateral view; (C) upper lip, anteroventral view; (D) left mandible, medial view; (D1) incisor and lacinia mobilis of left mandible, medial view; (E) right mandible, medial view; (E1) incisor and lacinia mobilis of right mandible, medial view; (F) lower lip, ventral view; (G) left maxilla 1, ventral view; (G1) apical part of left maxilla 1, ventral view; (H) right maxilla 2, ventral view; (I) right maxilliped, ventral view; (I1) palp article 4 and spine of left maxilliped, ventral view, setae omitted; (I2) apical part of inner plate of right maxilliped, ventral view, slender setae omitted. Scales: 0.1 mm.	Figure 3. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, male, 11.5 mm, OMNH-Ar 8541. (A) Right antenna 1, medial view; (A1) accessory flagellum of right antenna 1, medial view; (B) left antenna 2, lateral view; (C) upper lip, anteroventral view; (D) left mandible, medial view; (D1) incisor and lacinia mobilis of left mandible, medial view; (E) right mandible, medial view; (E1) incisor and lacinia mobilis of right mandible, medial view; (F) lower lip, ventral view; (G) left maxilla 1, ventral view; (G1) apical part of left maxilla 1, ventral view; (H) right maxilla 2, ventral view; (I) right maxilliped, ventral view; (I1) palp article 4 and spine of left maxilliped, ventral view, setae omitted; (I2) apical part of inner plate of right maxilliped, ventral view, slender setae omitted. Scales: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204795/files/figure.png	https://doi.org/10.5281/zenodo.5204795	Figure 4. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, male, 11.5 mm, OMNH-Ar 8541. (A) Left gnathopod 1, lateral view; (B) right gnathopod 2, lateral view; (B1) posterior margin of propodus of right gnathopod 2, medial view, setae omitted; (C–E) left pereopods 3–5, lateral views; (F) basis–dactylus of left pereopod 6, lateral view; (F1) coxa and gill of left pereopod 6, lateral view. Scale: 0.1 mm.	Figure 4. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, male, 11.5 mm, OMNH-Ar 8541. (A) Left gnathopod 1, lateral view; (B) right gnathopod 2, lateral view; (B1) posterior margin of propodus of right gnathopod 2, medial view, setae omitted; (C–E) left pereopods 3–5, lateral views; (F) basis–dactylus of left pereopod 6, lateral view; (F1) coxa and gill of left pereopod 6, lateral view. Scale: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204797/files/figure.png	https://doi.org/10.5281/zenodo.5204797	Figure 5. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan. (A–G) male, 11.5 mm, OMNH-Ar 8541; (H) female, 11.8 mm, OMNH-Ar 8542. (A) Basis–dactylus of left pereopod 7, lateral view; (A1) coxa of left pereopod 7, lateral view; (B–D) left pleopods 1–3, posterior views; (E, F) left uropods 1, 2, dorsal views; (G) uropods 3 and telson, dorsal view; (H) left gnathopod 2, lateral view, oostegite omitted; (H1) posterior margins of carpus and propodus of left gnathopod 2, lateral view, slender setae omitted. Scales: 0.1 mm.	Figure 5. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan. (A–G) male, 11.5 mm, OMNH-Ar 8541; (H) female, 11.8 mm, OMNH-Ar 8542. (A) Basis–dactylus of left pereopod 7, lateral view; (A1) coxa of left pereopod 7, lateral view; (B–D) left pleopods 1–3, posterior views; (E, F) left uropods 1, 2, dorsal views; (G) uropods 3 and telson, dorsal view; (H) left gnathopod 2, lateral view, oostegite omitted; (H1) posterior margins of carpus and propodus of left gnathopod 2, lateral view, slender setae omitted. Scales: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204799/files/figure.png	https://doi.org/10.5281/zenodo.5204799	Figure 6. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, female, 11.8 mm, OMNH-Ar 8542. (A) Left gnathopod 1, lateral view; (B–F) left pereopods 3–7, lateral views, oostegites on pereopods 3–5 omitted. Scale: 0.1 mm.	Figure 6. Ericthonius megalopus (Sars, 1879), Sagami Bay, Japan, female, 11.8 mm, OMNH-Ar 8542. (A) Left gnathopod 1, lateral view; (B–F) left pereopods 3–7, lateral views, oostegites on pereopods 3–5 omitted. Scale: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204801/files/figure.png	https://doi.org/10.5281/zenodo.5204801	Figure 7. Ericthonius megalopus (Sars, 1879), Norwegian Sea, male, 9.0 mm, ZMUC-CRU- 20157. (A, B) Left gnathopods 1, 2, lateral views; (B1) posterior margin of propodus of left gnathopod 2, lateral view, setae omitted; (C, D) left pereopods 3, 4, lateral views; (E) coxa, gill and basis of left pereopod 5, lateral view; (F) left coxa, gill and right basis of pereopod 6, lateral view; (G) coxa and basis of left pereopod 7, lateral view. Scale: 0.1 mm.	Figure 7. Ericthonius megalopus (Sars, 1879), Norwegian Sea, male, 9.0 mm, ZMUC-CRU- 20157. (A, B) Left gnathopods 1, 2, lateral views; (B1) posterior margin of propodus of left gnathopod 2, lateral view, setae omitted; (C, D) left pereopods 3, 4, lateral views; (E) coxa, gill and basis of left pereopod 5, lateral view; (F) left coxa, gill and right basis of pereopod 6, lateral view; (G) coxa and basis of left pereopod 7, lateral view. Scale: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204804/files/figure.png	https://doi.org/10.5281/zenodo.5204804	Figure 8. Ericthonius megalopus (Sars, 1879), Norwegian Sea, ovigerous female, 9.6 mm, ZMUC-CRU-20157. (A, B) Left gnathopods 1, 2, lateral views, oostegite on gnathopod 2 omitted; (B1) posterior margins of carpus and propodus of left gnathopod 2, lateral view, slender setae omitted; (C–F) left pereopods 3–6, lateral views, oostegites on pereopods 3–5 omitted; (G) coxa of left pereopod 7, lateral view. Scales: 0.1 mm.	Figure 8. Ericthonius megalopus (Sars, 1879), Norwegian Sea, ovigerous female, 9.6 mm, ZMUC-CRU-20157. (A, B) Left gnathopods 1, 2, lateral views, oostegite on gnathopod 2 omitted; (B1) posterior margins of carpus and propodus of left gnathopod 2, lateral view, slender setae omitted; (C–F) left pereopods 3–6, lateral views, oostegites on pereopods 3–5 omitted; (G) coxa of left pereopod 7, lateral view. Scales: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204807/files/figure.png	https://doi.org/10.5281/zenodo.5204807	Figure 9. Ericthonius megalopus (Sars, 1879) (previously identified as Ericthonius tolli), Arctic Ocean, male, 8.3 mm, ZMUC-CRU-20162. (A, B) Left gnathopods 1, 2, lateral views; (B1) posterior margin of propodus of left gnathopod 2, lateral view, setae omitted; (C, D) left pereopods 3, 4, lateral views; (E) basis–dactylus of left pereopod 5, lateral view; (E1) coxa and gill of left pereopod 5, lateral view; (F) basis–dactylus of right pereopod 6, lateral view; (F1) coxa of left pereopod 6, lateral view, gill lost. Scale: 0.1 mm.	Figure 9. Ericthonius megalopus (Sars, 1879) (previously identified as Ericthonius tolli), Arctic Ocean, male, 8.3 mm, ZMUC-CRU-20162. (A, B) Left gnathopods 1, 2, lateral views; (B1) posterior margin of propodus of left gnathopod 2, lateral view, setae omitted; (C, D) left pereopods 3, 4, lateral views; (E) basis–dactylus of left pereopod 5, lateral view; (E1) coxa and gill of left pereopod 5, lateral view; (F) basis–dactylus of right pereopod 6, lateral view; (F1) coxa of left pereopod 6, lateral view, gill lost. Scale: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204809/files/figure.png	https://doi.org/10.5281/zenodo.5204809	Figure 10. Ericthonius megalopus (Sars, 1879) (previously identified as Ericthonius tolli). (A) Arctic Ocean, male, 8.3 mm, ZMUC-CRU-20162; (B–H) Baffin Bay, ovigerous female, 11.2 mm, ZMUC-CRU-20161. (A) Basis–dactylus of right pereopod 7, lateral view; (A1) coxa of left pereopod 7, lateral view; (B, C) left gnathopods 1, 2, lateral views, oostegite on gnathopod 2 omitted; (C1) posterior margins of carpus and propodus of left gnathopod 2, lateral view, slender setae omitted; (D) coxa and gill of left pereopod 3, lateral view, oostegite omitted; (E, F) left pereopods 4, 5, lateral views, oostegites omitted; (G) coxa and gill of left pereopod 6, lateral view; (H) coxa of left pereopod 7, lateral view. Scales: 0.1 mm.	Figure 10. Ericthonius megalopus (Sars, 1879) (previously identified as Ericthonius tolli). (A) Arctic Ocean, male, 8.3 mm, ZMUC-CRU-20162; (B–H) Baffin Bay, ovigerous female, 11.2 mm, ZMUC-CRU-20161. (A) Basis–dactylus of right pereopod 7, lateral view; (A1) coxa of left pereopod 7, lateral view; (B, C) left gnathopods 1, 2, lateral views, oostegite on gnathopod 2 omitted; (C1) posterior margins of carpus and propodus of left gnathopod 2, lateral view, slender setae omitted; (D) coxa and gill of left pereopod 3, lateral view, oostegite omitted; (E, F) left pereopods 4, 5, lateral views, oostegites omitted; (G) coxa and gill of left pereopod 6, lateral view; (H) coxa of left pereopod 7, lateral view. Scales: 0.1 mm.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204811/files/figure.png	https://doi.org/10.5281/zenodo.5204811	Figure 11. Relationship between body length and width of basis in pereopod 4 of Ericthonius megalopus (Sars, 1879). Both sexes included.	Figure 11. Relationship between body length and width of basis in pereopod 4 of Ericthonius megalopus (Sars, 1879). Both sexes included.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
D7498784FFF2FFCE54B8FD52FC74FBC4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5204813/files/figure.png	https://doi.org/10.5281/zenodo.5204813	Figure 12. World distribution of Ericthonius megalopus (Sars, 1879). Circles indicate localities in the records as Ericthonius megalopus; triangles indicate localities in the records as Ericthonius tolli; star indicates Sagami Bay (present record). “T” indicates the type locality.	Figure 12. World distribution of Ericthonius megalopus (Sars, 1879). Circles indicate localities in the records as Ericthonius megalopus; triangles indicate localities in the records as Ericthonius tolli; star indicates Sagami Bay (present record). “T” indicates the type locality.	2011-12-31	Ariyama, Hiroyuki;Fujiwara, Yoshihiro		Zenodo	biologists	Ariyama, Hiroyuki;Fujiwara, Yoshihiro			
