taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
038987D9FF9FD7610032C1831E03F9B8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198880/files/figure.png	https://doi.org/10.5281/zenodo.11198880	Fig. 2. Ophiuridae Müller & Troschel, 1840, digital (A–C) and SEM (D–P) images. A–K. Ophiura ophiura (Linnaeus, 1758). A. Mouth parts macerated in bleach, one jaw with oral shield removed, another with madreporite still attached, no oGP present. B. Radial shields and abGP in situ, dorsal view. C. adGP and abGP at arm base after removal of RS and disc, dorsal view. D. abGP, adGP, and RS, lateral view. E. abGP, adGP, RS, internal view. F. adGP, distal end, dorsal aspect. G. abGP, abradial aspect. H. Madreporite, inner aspect. I. Radial shield, inner aspect. J. abGP, outer aspect. K. abGP, inner aspect. L–P. Ophiura sarsii Lütken, 1855. L. adGP, abGP in situ, ventral view. M. adGP, abradial aspect. N. adGP, adradial aspect. O. abGP, inner aspect. P. abGP, outer aspect. Scale bars: A–E= 1 mm; F–P=0.5 mm.	Fig. 2. Ophiuridae Müller & Troschel, 1840, digital (A–C) and SEM (D–P) images. A–K. Ophiura ophiura (Linnaeus, 1758). A. Mouth parts macerated in bleach, one jaw with oral shield removed, another with madreporite still attached, no oGP present. B. Radial shields and abGP in situ, dorsal view. C. adGP and abGP at arm base after removal of RS and disc, dorsal view. D. abGP, adGP, and RS, lateral view. E. abGP, adGP, RS, internal view. F. adGP, distal end, dorsal aspect. G. abGP, abradial aspect. H. Madreporite, inner aspect. I. Radial shield, inner aspect. J. abGP, outer aspect. K. abGP, inner aspect. L–P. Ophiura sarsii Lütken, 1855. L. adGP, abGP in situ, ventral view. M. adGP, abradial aspect. N. adGP, adradial aspect. O. abGP, inner aspect. P. abGP, outer aspect. Scale bars: A–E= 1 mm; F–P=0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF9FD77C0002C6D91B73FB83.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198882/files/figure.png	https://doi.org/10.5281/zenodo.11198882	Fig. 3. Ophiopyrgidae Perrier, 1893, Ophiopyrgus Lyman, 1878, SEM images. A–F. Ophiopyrgus saccharatus Studer, 1882. A. Section of ventral disc and arm. B. Dorsodistal view of arm base with RS, adGP, abGP. C. RS, inner side. D. Oral plates with attached vertebrae, adGP and abGP. E. adGP, abradio-ventral view. F. abGP, surface connecting to RS. G–H. Ophiopyrgus wyvillethomsoni. G. adGP and abGP adjoined. H. Radial shield pair, inner side. Scale bars: A–F =0.5 mm; G–H =0.1 mm.	Fig. 3. Ophiopyrgidae Perrier, 1893, Ophiopyrgus Lyman, 1878, SEM images. A–F. Ophiopyrgus saccharatus Studer, 1882. A. Section of ventral disc and arm. B. Dorsodistal view of arm base with RS, adGP, abGP. C. RS, inner side. D. Oral plates with attached vertebrae, adGP and abGP. E. adGP, abradio-ventral view. F. abGP, surface connecting to RS. G–H. Ophiopyrgus wyvillethomsoni. G. adGP and abGP adjoined. H. Radial shield pair, inner side. Scale bars: A–F =0.5 mm; G–H =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF82D77E007EC48A1A03FB68.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198884/files/figure.png	https://doi.org/10.5281/zenodo.11198884	Fig. 4. Ophiopyrgidae Perrier, 1893, Amphiophiura Matsumoto, 1915, SEM images, unless otherwise noted. A–G. A. latro (Koehler, 1904). A. Arm base, lateral aspect. B. abGP, radial aspect. C. abGP, abradial aspect. D. adGP, abradial aspect. E. adGP, adradial aspect. F. Radial shield, inner (ventral) aspect. G. Madreporite, inner (dorsal) aspect. H–P. A. insolita (Koehler, 1904). H. Radial shield, inner aspect. I. adGP, abradial aspect. J. adGP, dorsal view. K. adGP in situ, micro-CT. L. abGP in situ, micro- CT. M. abGP, abradial aspect (distal part with larger pores is exposed at disc edge). N. abGP, adradial aspect. O. abGP, distal end, arrowheads mark articular structures for genital papillae. P. Madreporite, inner aspect. Scale bars: A–O=0.5 mm; P=1 mm.	Fig. 4. Ophiopyrgidae Perrier, 1893, Amphiophiura Matsumoto, 1915, SEM images, unless otherwise noted. A–G. A. latro (Koehler, 1904). A. Arm base, lateral aspect. B. abGP, radial aspect. C. abGP, abradial aspect. D. adGP, abradial aspect. E. adGP, adradial aspect. F. Radial shield, inner (ventral) aspect. G. Madreporite, inner (dorsal) aspect. H–P. A. insolita (Koehler, 1904). H. Radial shield, inner aspect. I. adGP, abradial aspect. J. adGP, dorsal view. K. adGP in situ, micro-CT. L. abGP in situ, micro- CT. M. abGP, abradial aspect (distal part with larger pores is exposed at disc edge). N. abGP, adradial aspect. O. abGP, distal end, arrowheads mark articular structures for genital papillae. P. Madreporite, inner aspect. Scale bars: A–O=0.5 mm; P=1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF80D77F0057C4E01B7AFC6E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198886/files/figure.png	https://doi.org/10.5281/zenodo.11198886	Fig. 5. Ophiopyrgidae Perrier, 1893, Ophiopleura borealis Danielssen & Koren, 1877, SEM images. A. Dorsal disc, scales removed by bleaching. B. Bleached arm with genital plates, ventral view. C. RS, distal part, ventral aspect. D. adGP and abGP attached to each other, abradial view. E. adGP, abradial view. F. adGP, adradial view. G. abGP, dorso-lateral view. H. abGP, ventral view. I. abGP, lateral view. J. Oral shield, inner side. K. Madreporite, inner side. Scale bars: A= 10 mm; B–K =1 mm.	Fig. 5. Ophiopyrgidae Perrier, 1893, Ophiopleura borealis Danielssen & Koren, 1877, SEM images. A. Dorsal disc, scales removed by bleaching. B. Bleached arm with genital plates, ventral view. C. RS, distal part, ventral aspect. D. adGP and abGP attached to each other, abradial view. E. adGP, abradial view. F. adGP, adradial view. G. abGP, dorso-lateral view. H. abGP, ventral view. I. abGP, lateral view. J. Oral shield, inner side. K. Madreporite, inner side. Scale bars: A= 10 mm; B–K =1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF86D7790031C1591E80FC9C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198888/files/figure.png	https://doi.org/10.5281/zenodo.11198888	Fig. 6. A–G. Ophiomusaidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiomusa lymani (Wyville-Thomson, 1873), SEM, unless otherwise noted. A–B. Micro-CT, adGP and abGP in situ. C. Oral shield, inner aspect.D. Madreporite, inner aspect.E. adGP, abradial view.F. abGP, adradial view. G. RS, inner aspect. H. Astrophiuridae Sladen, 1879, Astrophiura sp., adGP. Scale bars: A–G= 1 mm; H =0.1 mm.	Fig. 6. A–G. Ophiomusaidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiomusa lymani (Wyville-Thomson, 1873), SEM, unless otherwise noted. A–B. Micro-CT, adGP and abGP in situ. C. Oral shield, inner aspect.D. Madreporite, inner aspect.E. adGP, abradial view.F. abGP, adradial view. G. RS, inner aspect. H. Astrophiuridae Sladen, 1879, Astrophiura sp., adGP. Scale bars: A–G= 1 mm; H =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF87D7790004C3A61BF9F832.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198888/files/figure.png	https://doi.org/10.5281/zenodo.11198888	Fig. 6. A–G. Ophiomusaidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiomusa lymani (Wyville-Thomson, 1873), SEM, unless otherwise noted. A–B. Micro-CT, adGP and abGP in situ. C. Oral shield, inner aspect.D. Madreporite, inner aspect.E. adGP, abradial view.F. abGP, adradial view. G. RS, inner aspect. H. Astrophiuridae Sladen, 1879, Astrophiura sp., adGP. Scale bars: A–G= 1 mm; H =0.1 mm.	Fig. 6. A–G. Ophiomusaidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiomusa lymani (Wyville-Thomson, 1873), SEM, unless otherwise noted. A–B. Micro-CT, adGP and abGP in situ. C. Oral shield, inner aspect.D. Madreporite, inner aspect.E. adGP, abradial view.F. abGP, adradial view. G. RS, inner aspect. H. Astrophiuridae Sladen, 1879, Astrophiura sp., adGP. Scale bars: A–G= 1 mm; H =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF84D77B006AC17C1B9FFB94.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198890/files/figure.png	https://doi.org/10.5281/zenodo.11198890	Fig. 7. Gorgonocephalidae Ljungman, 1867, Gorgonocephalus caputmedusae (Linnaeus, 1758), SEM images (except A, D, digital images). A. Dorsal disc inner side with radial shields exposed. B. Radial shield distal end, ventrolateral view. C. Radial shield, distal end, ventral view. D. adGP in situ. E–G. adGP, distal end fragments. H. adGP proximal part fragment. I. Madreporite, inner aspect. Scale bars:	Fig. 7. Gorgonocephalidae Ljungman, 1867, Gorgonocephalus caputmedusae (Linnaeus, 1758), SEM images (except A, D, digital images). A. Dorsal disc inner side with radial shields exposed. B. Radial shield distal end, ventrolateral view. C. Radial shield, distal end, ventral view. D. adGP in situ. E–G. adGP, distal end fragments. H. adGP proximal part fragment. I. Madreporite, inner aspect. Scale bars:	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF85D774004DC4A51CCAFDAB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198892/files/figure.png	https://doi.org/10.5281/zenodo.11198892	Fig. 8. Asteronychidae Verrill, 1899, Asteronyx loveni Müller & Troschel, 1842. A=micro-CT; B–C =digital photos; D–J = SEM images. A–B. Radial shield and fused adradial and abradial genital plates in situ. C. Genital plates in situ. D. Genital plates, adradial view. E. Genital plates, abradial view. F. Radial shields, dissected from disc, distal ends fallen off. G. Detail of F, separating layers of radial shields. H. Radial shield distal end, inner aspect. I. Radial shield, distal end, outer side. J. Madreporite, inner aspect. Scale bars: A–G =1 mm; H–J =0.5 mm.	Fig. 8. Asteronychidae Verrill, 1899, Asteronyx loveni Müller & Troschel, 1842. A=micro-CT; B–C =digital photos; D–J = SEM images. A–B. Radial shield and fused adradial and abradial genital plates in situ. C. Genital plates in situ. D. Genital plates, adradial view. E. Genital plates, abradial view. F. Radial shields, dissected from disc, distal ends fallen off. G. Detail of F, separating layers of radial shields. H. Radial shield distal end, inner aspect. I. Radial shield, distal end, outer side. J. Madreporite, inner aspect. Scale bars: A–G =1 mm; H–J =0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF8BD7760037C1591BF1FD44.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198894/files/figure.png	https://doi.org/10.5281/zenodo.11198894	Fig. 9. Euryalidae Gray, 1840, Euryale aspera Lamarck, 1816. A, G= digital images; B–F, H–J =SEM images. A. adGP in situ. B. adGP abradial view. C. adGP, dorso-adradial view. D. Radial shield, dorsal view. E. Radial shield, latero-ventral view. F. abGP. G. Section of ventral disc. H. Adoral shields and madreporite, inner view. I. Madreporite, inner aspect. J. Other madreporite, inner aspect. Scale bars: A–H=1 mm; I–J =0.5 mm	Fig. 9. Euryalidae Gray, 1840, Euryale aspera Lamarck, 1816. A, G= digital images; B–F, H–J =SEM images. A. adGP in situ. B. adGP abradial view. C. adGP, dorso-adradial view. D. Radial shield, dorsal view. E. Radial shield, latero-ventral view. F. abGP. G. Section of ventral disc. H. Adoral shields and madreporite, inner view. I. Madreporite, inner aspect. J. Other madreporite, inner aspect. Scale bars: A–H=1 mm; I–J =0.5 mm	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF88D7760043C37B1A70F832.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198896/files/figure.png	https://doi.org/10.5281/zenodo.11198896	Fig. 10. Ophioscolecidae Lütken, 1869, Ophioscolex glacialis Müller & Troschel, 1842, SEM, unless otherwise noted. A. Oral shield, madreporite, oral genital plates in situ (lightly bleached), digital image. B. adGP, adradial aspect. C. adGP, abradial spect. D. adGP, distal end. E. abGP. F. adoral shield with oGP attached. G. oGP. H. Oral shield, inner aspect. I. Madreporite, inner aspect. Scale bars: 0.5 mm.	Fig. 10. Ophioscolecidae Lütken, 1869, Ophioscolex glacialis Müller & Troschel, 1842, SEM, unless otherwise noted. A. Oral shield, madreporite, oral genital plates in situ (lightly bleached), digital image. B. adGP, adradial aspect. C. adGP, abradial spect. D. adGP, distal end. E. abGP. F. adoral shield with oGP attached. G. oGP. H. Oral shield, inner aspect. I. Madreporite, inner aspect. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF89D7700016C57A1BB6FD3F.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198898/files/figure.png	https://doi.org/10.5281/zenodo.11198898	Fig. 11. Ophioscolecidae Lütken, 1869, Ophiolycus purpureus (Düben & Koren, 1846), SEM, unless otherwise noted.A. Mouth parts in situ (bleached, arrowheads mark oGPs), digital photo. B. oGP in situ (arrowheads), micro-CT. C. Oral GP. D. adGP and abGP in situ, micro-CT. E. adGP and abGP in situ. F. adGP and abGP, dissociated, adradial aspect. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Oral shield, inner aspect. J. Madreporite, inner aspect. Scale bars: 0.5 mm.	Fig. 11. Ophioscolecidae Lütken, 1869, Ophiolycus purpureus (Düben & Koren, 1846), SEM, unless otherwise noted.A. Mouth parts in situ (bleached, arrowheads mark oGPs), digital photo. B. oGP in situ (arrowheads), micro-CT. C. Oral GP. D. adGP and abGP in situ, micro-CT. E. adGP and abGP in situ. F. adGP and abGP, dissociated, adradial aspect. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Oral shield, inner aspect. J. Madreporite, inner aspect. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF8FD7720006C1591CE0FC2C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198902/files/figure.png	https://doi.org/10.5281/zenodo.11198902	Fig. 12. Ophiohelidae Perrier, 1893.A–B. Ophiomyces frutectosus Lyman, 1869, digitalphotos.A. Lateral view. B. Detail of genital plates in situ. C–H. Ophiomyces delata Koehler, 1904, SEM. C. adGP, abradial aspect. D. abGP, adradial aspect. E. Genital plates in situ. F. Oral shield, external aspect. G. Oral shield, inner aspect. H. Madreporite, inner aspect. Scale bars: A–B =1 mm; C–E =0.5 mm; F–H=0.1 mm.	Fig. 12. Ophiohelidae Perrier, 1893.A–B. Ophiomyces frutectosus Lyman, 1869, digitalphotos.A. Lateral view. B. Detail of genital plates in situ. C–H. Ophiomyces delata Koehler, 1904, SEM. C. adGP, abradial aspect. D. abGP, adradial aspect. E. Genital plates in situ. F. Oral shield, external aspect. G. Oral shield, inner aspect. H. Madreporite, inner aspect. Scale bars: A–B =1 mm; C–E =0.5 mm; F–H=0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FF8CD74C005CC4CE1C62FBAD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198904/files/figure.png	https://doi.org/10.5281/zenodo.11198904	Fig. 13. Ophiodermatidae, Ljungman, 1867, Ophioderma longicaudum (Bruzelius, 1805), SEM, unless otherwise noted. A–C. adGP and abGP in situ, in various orientations, micro-CT. D. adGP and abGP in situ. E. adGP, abradial aspect. F. abGP, arrow points to corresponding articular structure on adGP. G. adGP, adradial aspect. H. adGP, dorsal view. I–J. adGP, distal aspect. K. Radial shield, inner side. L. Oral shield, inner side. M. Jaw (arrowhead marks oGP), bleached, digital photo. N. Jaw with oral shield removed, oGP exposed (arrowheads), bleached, digital photo. O. Pair of oGP, ventral aspect. P. oGP, lateral aspect. Q. Madreporite, inner side. Scale bars: 0.5 mm.	Fig. 13. Ophiodermatidae, Ljungman, 1867, Ophioderma longicaudum (Bruzelius, 1805), SEM, unless otherwise noted. A–C. adGP and abGP in situ, in various orientations, micro-CT. D. adGP and abGP in situ. E. adGP, abradial aspect. F. abGP, arrow points to corresponding articular structure on adGP. G. adGP, adradial aspect. H. adGP, dorsal view. I–J. adGP, distal aspect. K. Radial shield, inner side. L. Oral shield, inner side. M. Jaw (arrowhead marks oGP), bleached, digital photo. N. Jaw with oral shield removed, oGP exposed (arrowheads), bleached, digital photo. O. Pair of oGP, ventral aspect. P. oGP, lateral aspect. Q. Madreporite, inner side. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB2D74E0046C4F31C19FCDE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198906/files/figure.png	https://doi.org/10.5281/zenodo.11198906	Fig. 14. Ophiomyxidae Ljungman, 1867, SEM, unless otherwise noted. A–K. Ophiomyxa serpentaria Lyman, 1883. A–C. Digital photos. A. Arm, dorsal view. B. Arm and mouth section. C. Arm and mouth section with oral shield removed. D. Arm with genital plates attached. E. adGP, adradial aspect. F. adGP, abradio-ventral aspect. G. abGP, arrow connects articular structures. H. Madreporite, inner aspect. I. Oral shield, inner aspect. J. oGPs. K. Radial shield, inner aspect. L–Q. Ophiomyxa pentagona (Lamarck, 1816).L. oGPs, view from inside disc, micro-CT.M. adGP, adradial aspect.N. adGP, abradial aspect. O. abGP, arrow connects articular structures. P. Radial shield, inner aspect. Q. Madreporite, inner aspect. R–S. Ophiarachna incrassata (Lamarck, 1816). R. adGP, abradial aspect. S. abGP. Scale bars: A–Q =0.5 mm; R–S =1 mm.	Fig. 14. Ophiomyxidae Ljungman, 1867, SEM, unless otherwise noted. A–K. Ophiomyxa serpentaria Lyman, 1883. A–C. Digital photos. A. Arm, dorsal view. B. Arm and mouth section. C. Arm and mouth section with oral shield removed. D. Arm with genital plates attached. E. adGP, adradial aspect. F. adGP, abradio-ventral aspect. G. abGP, arrow connects articular structures. H. Madreporite, inner aspect. I. Oral shield, inner aspect. J. oGPs. K. Radial shield, inner aspect. L–Q. Ophiomyxa pentagona (Lamarck, 1816).L. oGPs, view from inside disc, micro-CT.M. adGP, adradial aspect.N. adGP, abradial aspect. O. abGP, arrow connects articular structures. P. Radial shield, inner aspect. Q. Madreporite, inner aspect. R–S. Ophiarachna incrassata (Lamarck, 1816). R. adGP, abradial aspect. S. abGP. Scale bars: A–Q =0.5 mm; R–S =1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB2D74E0046C4F31C19FCDE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198930/files/figure.png	https://doi.org/10.5281/zenodo.11198930	Fig. 24. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–C. Ophiochiton fastigatus Lyman, 1878. A. Ventral disc section, digital photo. B. adGP, proximal end broken. C. abGP. D–J. Ophioplax lamellosa Matsumoto, 1915. D. Ventral interradius. E. adGP, lateral aspect (adradial?). F. abGP. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Madreporite, inner aspect. J. Oral shield, inner aspect. Scale bars: 0.5 mm.	Fig. 24. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–C. Ophiochiton fastigatus Lyman, 1878. A. Ventral disc section, digital photo. B. adGP, proximal end broken. C. abGP. D–J. Ophioplax lamellosa Matsumoto, 1915. D. Ventral interradius. E. adGP, lateral aspect (adradial?). F. abGP. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Madreporite, inner aspect. J. Oral shield, inner aspect. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB2D74E0046C4F31C19FCDE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198904/files/figure.png	https://doi.org/10.5281/zenodo.11198904	Fig. 13. Ophiodermatidae, Ljungman, 1867, Ophioderma longicaudum (Bruzelius, 1805), SEM, unless otherwise noted. A–C. adGP and abGP in situ, in various orientations, micro-CT. D. adGP and abGP in situ. E. adGP, abradial aspect. F. abGP, arrow points to corresponding articular structure on adGP. G. adGP, adradial aspect. H. adGP, dorsal view. I–J. adGP, distal aspect. K. Radial shield, inner side. L. Oral shield, inner side. M. Jaw (arrowhead marks oGP), bleached, digital photo. N. Jaw with oral shield removed, oGP exposed (arrowheads), bleached, digital photo. O. Pair of oGP, ventral aspect. P. oGP, lateral aspect. Q. Madreporite, inner side. Scale bars: 0.5 mm.	Fig. 13. Ophiodermatidae, Ljungman, 1867, Ophioderma longicaudum (Bruzelius, 1805), SEM, unless otherwise noted. A–C. adGP and abGP in situ, in various orientations, micro-CT. D. adGP and abGP in situ. E. adGP, abradial aspect. F. abGP, arrow points to corresponding articular structure on adGP. G. adGP, adradial aspect. H. adGP, dorsal view. I–J. adGP, distal aspect. K. Radial shield, inner side. L. Oral shield, inner side. M. Jaw (arrowhead marks oGP), bleached, digital photo. N. Jaw with oral shield removed, oGP exposed (arrowheads), bleached, digital photo. O. Pair of oGP, ventral aspect. P. oGP, lateral aspect. Q. Madreporite, inner side. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB0D7480017C3B51B64FD4F.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198908/files/figure.png	https://doi.org/10.5281/zenodo.11198908	Fig. 15. Ophiocomidae Ljungman, 1867, SEM, unless otherwise noted. A–P. Ophiocoma scolopendrina (Lamarck, 1816). A. Genital plates in situ, dorsal view, digital photo. B. Genital plates in situ, distal ends, adradial view, micro-CT.C–D. adGP, abGP and RS articulating, adradial aspect. E. Radial shield, inner aspect. F. adGP, ventro-adradial aspect. G. adGP, abradial aspect. H. adGP, abradial aspect. I. abGP, abradial aspect, arrow connects articular structures. J. abGP, adradial aspect. K. Ventral arms and mouth (arrowheads mark oGP), digital photo. L. Oral shield with oGP attached (arrowheads). M. oGP, abradial aspect. N. oGP, adradial aspect. O. Oral shield, inner aspect. P. Madreporite, inner aspect. Q–U. Ophiocoma erinaceus Müller & Troschel, 1842. Q. Radial shield, inner aspect. R. Oral shield, inner aspect. S. Madreporite, inner aspect. T. adGP, abradial aspect. U. abGP, adradial aspect. Scale bars: A–B, E, K–L, O–P= 0.5 mm; C–D, F–J, Q–U= 1 mm; M–N= 0.1 mm.	Fig. 15. Ophiocomidae Ljungman, 1867, SEM, unless otherwise noted. A–P. Ophiocoma scolopendrina (Lamarck, 1816). A. Genital plates in situ, dorsal view, digital photo. B. Genital plates in situ, distal ends, adradial view, micro-CT.C–D. adGP, abGP and RS articulating, adradial aspect. E. Radial shield, inner aspect. F. adGP, ventro-adradial aspect. G. adGP, abradial aspect. H. adGP, abradial aspect. I. abGP, abradial aspect, arrow connects articular structures. J. abGP, adradial aspect. K. Ventral arms and mouth (arrowheads mark oGP), digital photo. L. Oral shield with oGP attached (arrowheads). M. oGP, abradial aspect. N. oGP, adradial aspect. O. Oral shield, inner aspect. P. Madreporite, inner aspect. Q–U. Ophiocoma erinaceus Müller & Troschel, 1842. Q. Radial shield, inner aspect. R. Oral shield, inner aspect. S. Madreporite, inner aspect. T. adGP, abradial aspect. U. abGP, adradial aspect. Scale bars: A–B, E, K–L, O–P= 0.5 mm; C–D, F–J, Q–U= 1 mm; M–N= 0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB6D74A005FC3251C76FD54.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198910/files/figure.png	https://doi.org/10.5281/zenodo.11198910	Fig. 16. Ophiacanthidae Ljungman, 1867. SEM, unless otherwise noted. A–L. Ophiacantha bidentata (Bruzelius, 1805) (11.5 mm dd). A–B. Genital plates and radial shield in situ, micro-CT. C. adGP, abradial aspect. D. adGP, adradial aspect. E. abGP. F. Oral shield and oGP, in situ, bleached specimen, digital photo. G. Madreporite and oGP in situ, external aspect, micro-CT. H. Madreporite and oGP in situ, internal aspect, micro-CT. I. Radial shield, internal aspect. J. Madreporite, internal disto-lateral aspect. K. Oral shield and oGP (arrowheads), internal aspect.L. oGP, various aspects.M–O. O. bidentata (13 mm dd). M. adGP, adradial aspect. N. adGP, abradial aspect. O. abGP. P–T. O. abyssicola G.O. Sars, 1872. P. adGP, adradial aspect. Q. adGP, abradial aspect. R. abGP. S. Madreporite. T. Radial shield, internal aspect. Scale bars: 0.5 mm.	Fig. 16. Ophiacanthidae Ljungman, 1867. SEM, unless otherwise noted. A–L. Ophiacantha bidentata (Bruzelius, 1805) (11.5 mm dd). A–B. Genital plates and radial shield in situ, micro-CT. C. adGP, abradial aspect. D. adGP, adradial aspect. E. abGP. F. Oral shield and oGP, in situ, bleached specimen, digital photo. G. Madreporite and oGP in situ, external aspect, micro-CT. H. Madreporite and oGP in situ, internal aspect, micro-CT. I. Radial shield, internal aspect. J. Madreporite, internal disto-lateral aspect. K. Oral shield and oGP (arrowheads), internal aspect.L. oGP, various aspects.M–O. O. bidentata (13 mm dd). M. adGP, adradial aspect. N. adGP, abradial aspect. O. abGP. P–T. O. abyssicola G.O. Sars, 1872. P. adGP, adradial aspect. Q. adGP, abradial aspect. R. abGP. S. Madreporite. T. Radial shield, internal aspect. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB4D74A0001C2E51DA0F817.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198912/files/figure.png	https://doi.org/10.5281/zenodo.11198912	Fig. 17. Ophiocamacidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018. Ophiocamax vitrea Lyman, 1878, SEM, unless otherwise noted. A. Adradial genital plate, dorsal aspect. B. Adradial genital plate, lateral aspect. C. Abradial genital plate. D. Oral genital plates in situ, digital photo. E. Oral shield and genital plates, micro-CT. F. Oral genital plates. G. Radial shield, internal aspect. H. Oral shield, internal aspect. I. Madreporite, internal aspect. Scale bars: A–E, G =0.5 mm; F, H–I =0.1 mm.	Fig. 17. Ophiocamacidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018. Ophiocamax vitrea Lyman, 1878, SEM, unless otherwise noted. A. Adradial genital plate, dorsal aspect. B. Adradial genital plate, lateral aspect. C. Abradial genital plate. D. Oral genital plates in situ, digital photo. E. Oral shield and genital plates, micro-CT. F. Oral genital plates. G. Radial shield, internal aspect. H. Oral shield, internal aspect. I. Madreporite, internal aspect. Scale bars: A–E, G =0.5 mm; F, H–I =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB5D74503A6C5DD1D4EFC62.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198914/files/figure.png	https://doi.org/10.5281/zenodo.11198914	Fig. 18. Ophiotomidae Paterson, 1985. Ophiocomina nigra (Abildgaard in O.F. Müller, 1789), SEM, unless otherwise noted. A–B. abGP and adGP in situ (micro-CT). C. adGP and abGP at arm. D. adGP abradial aspect. E. abGP, lateral aspect. F. Radial shield, inner aspect. G. Oral GP in situ, bleached specimen, digital photo. H. oGPs at madreporite, inside disc view, micro-CT. I. Oral shield, internal aspect. J. Madreporite, inner aspect. K. Oral GPs. Scale bars: A–J =0.5 mm; K =0.1 mm.	Fig. 18. Ophiotomidae Paterson, 1985. Ophiocomina nigra (Abildgaard in O.F. Müller, 1789), SEM, unless otherwise noted. A–B. abGP and adGP in situ (micro-CT). C. adGP and abGP at arm. D. adGP abradial aspect. E. abGP, lateral aspect. F. Radial shield, inner aspect. G. Oral GP in situ, bleached specimen, digital photo. H. oGPs at madreporite, inside disc view, micro-CT. I. Oral shield, internal aspect. J. Madreporite, inner aspect. K. Oral GPs. Scale bars: A–J =0.5 mm; K =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFBBD745000EC3EE1A4DF832.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198916/files/figure.png	https://doi.org/10.5281/zenodo.11198916	Fig. 19. Ophiotomidae Paterson, 1985, SEM. A–E. Ophiocopa spatula Lyman, 1883. A. Radial shield, inner aspect. B. adGP, abradial aspect. C. adGP, adradial aspect. D. Madreporite, inner aspect. E. abGP, abradial aspect. F–I. Ophiotreta valenciennesi (Lyman, 1878). F. Radial shield, inner aspect. G. adGP, abradial aspect. H. adGP, abradial aspect. I. abGP. Scale bars: A–E= 0.5 mm; F–I =1 mm.	Fig. 19. Ophiotomidae Paterson, 1985, SEM. A–E. Ophiocopa spatula Lyman, 1883. A. Radial shield, inner aspect. B. adGP, abradial aspect. C. adGP, adradial aspect. D. Madreporite, inner aspect. E. abGP, abradial aspect. F–I. Ophiotreta valenciennesi (Lyman, 1878). F. Radial shield, inner aspect. G. adGP, abradial aspect. H. adGP, abradial aspect. I. abGP. Scale bars: A–E= 0.5 mm; F–I =1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB8D7470031C11B1FFCFE3E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198916/files/figure.png	https://doi.org/10.5281/zenodo.11198916	Fig. 19. Ophiotomidae Paterson, 1985, SEM. A–E. Ophiocopa spatula Lyman, 1883. A. Radial shield, inner aspect. B. adGP, abradial aspect. C. adGP, adradial aspect. D. Madreporite, inner aspect. E. abGP, abradial aspect. F–I. Ophiotreta valenciennesi (Lyman, 1878). F. Radial shield, inner aspect. G. adGP, abradial aspect. H. adGP, abradial aspect. I. abGP. Scale bars: A–E= 0.5 mm; F–I =1 mm.	Fig. 19. Ophiotomidae Paterson, 1985, SEM. A–E. Ophiocopa spatula Lyman, 1883. A. Radial shield, inner aspect. B. adGP, abradial aspect. C. adGP, adradial aspect. D. Madreporite, inner aspect. E. abGP, abradial aspect. F–I. Ophiotreta valenciennesi (Lyman, 1878). F. Radial shield, inner aspect. G. adGP, abradial aspect. H. adGP, abradial aspect. I. abGP. Scale bars: A–E= 0.5 mm; F–I =1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFB9D7400066C2DF1DE9FADF.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198918/files/figure.png	https://doi.org/10.5281/zenodo.11198918	Fig. 20. Hemieuryalidae Verrill, 1899. Ophiozonella longispina (H.L. Clark, 1908), SEM, unless otherwise noted. A. Section of ventral aspect, digital image. B. adGP, abradial aspect. C. adGP, adradaial aspect. D. adGP, dorsal aspect. E. abGP, dorsal aspect. F. Madreporite, inner aspect. G. Oral shield, inner aspect. H. Radial shield, inner aspect. Scale bars: 0.5 mm.	Fig. 20. Hemieuryalidae Verrill, 1899. Ophiozonella longispina (H.L. Clark, 1908), SEM, unless otherwise noted. A. Section of ventral aspect, digital image. B. adGP, abradial aspect. C. adGP, adradaial aspect. D. adGP, dorsal aspect. E. abGP, dorsal aspect. F. Madreporite, inner aspect. G. Oral shield, inner aspect. H. Radial shield, inner aspect. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFBED7420049C57E1C07FD27.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198920/files/figure.png	https://doi.org/10.5281/zenodo.11198920	Fig. 21. Ophiolepididae Ljungman, 1867, SEM, unless otherwise noted. A–L. Ophiolepis variegata Lütken, 1856. A. Oral disc, digital image. B. Genital plates at arm. C. adGP, abradial aspect. D. adGP, adradial aspect. E. Radial shield and abGP at arm. F. abGP and adGP articulated. G. abGP, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. J–K. Oral GP, uncertain aspects. L. Radial shield, inner aspect.M–P. Ophiotypa simplex Koehler, 1897.M. adGP articulated at arm and under fused radial shields (or radial primary plates). N. oGP, inner aspect. O. oGP, outer aspect. P. Radial shields (or radial primary plates), inner aspect. Scale bars: A–G, L–M, P=1 mm; H–K=0.5 mm; N–O =0.2 mm.	Fig. 21. Ophiolepididae Ljungman, 1867, SEM, unless otherwise noted. A–L. Ophiolepis variegata Lütken, 1856. A. Oral disc, digital image. B. Genital plates at arm. C. adGP, abradial aspect. D. adGP, adradial aspect. E. Radial shield and abGP at arm. F. abGP and adGP articulated. G. abGP, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. J–K. Oral GP, uncertain aspects. L. Radial shield, inner aspect.M–P. Ophiotypa simplex Koehler, 1897.M. adGP articulated at arm and under fused radial shields (or radial primary plates). N. oGP, inner aspect. O. oGP, outer aspect. P. Radial shields (or radial primary plates), inner aspect. Scale bars: A–G, L–M, P=1 mm; H–K=0.5 mm; N–O =0.2 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFBCD7420008C32C1B8FF832.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198920/files/figure.png	https://doi.org/10.5281/zenodo.11198920	Fig. 21. Ophiolepididae Ljungman, 1867, SEM, unless otherwise noted. A–L. Ophiolepis variegata Lütken, 1856. A. Oral disc, digital image. B. Genital plates at arm. C. adGP, abradial aspect. D. adGP, adradial aspect. E. Radial shield and abGP at arm. F. abGP and adGP articulated. G. abGP, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. J–K. Oral GP, uncertain aspects. L. Radial shield, inner aspect.M–P. Ophiotypa simplex Koehler, 1897.M. adGP articulated at arm and under fused radial shields (or radial primary plates). N. oGP, inner aspect. O. oGP, outer aspect. P. Radial shields (or radial primary plates), inner aspect. Scale bars: A–G, L–M, P=1 mm; H–K=0.5 mm; N–O =0.2 mm.	Fig. 21. Ophiolepididae Ljungman, 1867, SEM, unless otherwise noted. A–L. Ophiolepis variegata Lütken, 1856. A. Oral disc, digital image. B. Genital plates at arm. C. adGP, abradial aspect. D. adGP, adradial aspect. E. Radial shield and abGP at arm. F. abGP and adGP articulated. G. abGP, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. J–K. Oral GP, uncertain aspects. L. Radial shield, inner aspect.M–P. Ophiotypa simplex Koehler, 1897.M. adGP articulated at arm and under fused radial shields (or radial primary plates). N. oGP, inner aspect. O. oGP, outer aspect. P. Radial shields (or radial primary plates), inner aspect. Scale bars: A–G, L–M, P=1 mm; H–K=0.5 mm; N–O =0.2 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFBDD7430004C17C1DB5F8CD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198924/files/figure.png	https://doi.org/10.5281/zenodo.11198924	Fig. 22. Amphilimnidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Amphilimna olivacea (Lyman, 1869). A–C =micro-CT; D–H, J–N =SEM; I=digital image. A. adGP, abGP, wing-like LAPs in situ. B. Detail of A, different angle. C. adGP in situ, dorsal aspect. D. adGP, adradial aspect. E. Radial shield, inner aspect. F. RS articular structures. G. abGP, abradial aspect. H. abGP, adradial aspect. I. Jaw in situ, bleached. J. Oral shield, inner aspect. K–L. oGP inner/outer aspects (unclear which is which). M. Madreporite, inner aspect. Scale bars: A–C, F, J–M =0.2 mm; D–E, G–I =0.5 mm.	Fig. 22. Amphilimnidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Amphilimna olivacea (Lyman, 1869). A–C =micro-CT; D–H, J–N =SEM; I=digital image. A. adGP, abGP, wing-like LAPs in situ. B. Detail of A, different angle. C. adGP in situ, dorsal aspect. D. adGP, adradial aspect. E. Radial shield, inner aspect. F. RS articular structures. G. abGP, abradial aspect. H. abGP, adradial aspect. I. Jaw in situ, bleached. J. Oral shield, inner aspect. K–L. oGP inner/outer aspects (unclear which is which). M. Madreporite, inner aspect. Scale bars: A–C, F, J–M =0.2 mm; D–E, G–I =0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA3D75D0006C1591CDAF97D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198926/files/figure.png	https://doi.org/10.5281/zenodo.11198926	Fig. 23. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–J. Ophionereis reticulata (Say, 1825).A. Oral aspect, digital image. B–C. Micro-CT.B. Oral shield with oGP, inner view.C. abGp, adGB and RS in situ. D. abGP and adGP in situ. E. adPG, abradial aspect. F. abGP. G. Radial shield, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. J. Oral genital plates, one with round tubercle/process. K–M. Ophionereis porrecta (Lyman, 1860). K. Radial shield, inner aspect. L. adGP, abradial aspect. M. abGP. N–P. Ophionereis degeneri (A.H. Clark, 1949). N. Radial shield, inner aspect. O. adGP, abradial aspect. P. abGP. Scale bars: 0.5 mm.	Fig. 23. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–J. Ophionereis reticulata (Say, 1825).A. Oral aspect, digital image. B–C. Micro-CT.B. Oral shield with oGP, inner view.C. abGp, adGB and RS in situ. D. abGP and adGP in situ. E. adPG, abradial aspect. F. abGP. G. Radial shield, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. J. Oral genital plates, one with round tubercle/process. K–M. Ophionereis porrecta (Lyman, 1860). K. Radial shield, inner aspect. L. adGP, abradial aspect. M. abGP. N–P. Ophionereis degeneri (A.H. Clark, 1949). N. Radial shield, inner aspect. O. adGP, abradial aspect. P. abGP. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA1D75F0007C11B1E7FFA30.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198930/files/figure.png	https://doi.org/10.5281/zenodo.11198930	Fig. 24. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–C. Ophiochiton fastigatus Lyman, 1878. A. Ventral disc section, digital photo. B. adGP, proximal end broken. C. abGP. D–J. Ophioplax lamellosa Matsumoto, 1915. D. Ventral interradius. E. adGP, lateral aspect (adradial?). F. abGP. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Madreporite, inner aspect. J. Oral shield, inner aspect. Scale bars: 0.5 mm.	Fig. 24. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–C. Ophiochiton fastigatus Lyman, 1878. A. Ventral disc section, digital photo. B. adGP, proximal end broken. C. abGP. D–J. Ophioplax lamellosa Matsumoto, 1915. D. Ventral interradius. E. adGP, lateral aspect (adradial?). F. abGP. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Madreporite, inner aspect. J. Oral shield, inner aspect. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA1D7590033C63B1D06FDD2.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198930/files/figure.png	https://doi.org/10.5281/zenodo.11198930	Fig. 24. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–C. Ophiochiton fastigatus Lyman, 1878. A. Ventral disc section, digital photo. B. adGP, proximal end broken. C. abGP. D–J. Ophioplax lamellosa Matsumoto, 1915. D. Ventral interradius. E. adGP, lateral aspect (adradial?). F. abGP. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Madreporite, inner aspect. J. Oral shield, inner aspect. Scale bars: 0.5 mm.	Fig. 24. Ophionereididae Ljungman, 1867, SEM, unless otherwise noted. A–C. Ophiochiton fastigatus Lyman, 1878. A. Ventral disc section, digital photo. B. adGP, proximal end broken. C. abGP. D–J. Ophioplax lamellosa Matsumoto, 1915. D. Ventral interradius. E. adGP, lateral aspect (adradial?). F. abGP. G. adGP, dorsal aspect. H. Radial shield, inner aspect. I. Madreporite, inner aspect. J. Oral shield, inner aspect. Scale bars: 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA7D75B0031C2DF1A3DFD99.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198932/files/figure.png	https://doi.org/10.5281/zenodo.11198932	Fig. 25. Amphiuridae Ljungman, 1867, SEM, unless otherwise noted. A–N. Amphiura chiajei Forbes, 1843. A–C. adGP and abGP in situ, micro-CT. D. adGP, dorsal aspect. E. adGP, ventral aspect. F. abGP, lateral aspect. G. Radial shield, inner aspect. H. Oral section, oGP. I. Oral GP. J–K. Digital images. J. Oral shield section, ventral disc scales removed, oGP. K. Oral GP in situ after removal of oral shield. L. Oral GP in situ (arrows), inside disc, micro-CT. M. Oral shield, inner aspect. N. Madreporite, inner aspect. O–R. Amphiura filiformis (O.F. Müller, 1776). O. adGP, dorsal aspect. P. adGP, ventral aspect. Q. abGP, lateral aspect. R. Oral GP. S–U. Amphipholis squamata (Delle Chiaje, 1828). S. adGP, lateral aspect. T. abGP lateral aspect. U. Radial shield, inner aspect. Arrowheads (H, J–K) mark oGP. Scale bars: A–H, J–L, O–Q=0.5 mm; I, M–N, R–U=0.1 mm.	Fig. 25. Amphiuridae Ljungman, 1867, SEM, unless otherwise noted. A–N. Amphiura chiajei Forbes, 1843. A–C. adGP and abGP in situ, micro-CT. D. adGP, dorsal aspect. E. adGP, ventral aspect. F. abGP, lateral aspect. G. Radial shield, inner aspect. H. Oral section, oGP. I. Oral GP. J–K. Digital images. J. Oral shield section, ventral disc scales removed, oGP. K. Oral GP in situ after removal of oral shield. L. Oral GP in situ (arrows), inside disc, micro-CT. M. Oral shield, inner aspect. N. Madreporite, inner aspect. O–R. Amphiura filiformis (O.F. Müller, 1776). O. adGP, dorsal aspect. P. adGP, ventral aspect. Q. abGP, lateral aspect. R. Oral GP. S–U. Amphipholis squamata (Delle Chiaje, 1828). S. adGP, lateral aspect. T. abGP lateral aspect. U. Radial shield, inner aspect. Arrowheads (H, J–K) mark oGP. Scale bars: A–H, J–L, O–Q=0.5 mm; I, M–N, R–U=0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA5D75B001CC2B81D49F941.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198936/files/figure.png	https://doi.org/10.5281/zenodo.11198936	Fig. 26. Amphilepididae Matsumoto, 1915, Amphilepis norvegica (Ljungman, 1865), SEM, unless otherwise noted. A–B. Micro-CT. A. Genital plates in situ, external aspect. B. Genital plates in situ, internal aspect. C. adGP, ventral aspect. D. adGP, dorsal aspect. E. abGP, ventral aspect. F. abGP, dorsal aspect. G. Radial shield, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. Scale bars: A–B, H–I = 0.1 mm; C–G =0.5 mm.	Fig. 26. Amphilepididae Matsumoto, 1915, Amphilepis norvegica (Ljungman, 1865), SEM, unless otherwise noted. A–B. Micro-CT. A. Genital plates in situ, external aspect. B. Genital plates in situ, internal aspect. C. adGP, ventral aspect. D. adGP, dorsal aspect. E. abGP, ventral aspect. F. abGP, dorsal aspect. G. Radial shield, inner aspect. H. Oral shield, inner aspect. I. Madreporite, inner aspect. Scale bars: A–B, H–I = 0.1 mm; C–G =0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA5D7550036C72E1B5FFC8B.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198938/files/figure.png	https://doi.org/10.5281/zenodo.11198938	Fig. 27. Ophiactidae Matsumoto, 1915, SEM, unless otherwise noted. A. Ophiactis savignyi (Müller & Troschel, 1842), genital plates in situ, micro-CT. B–L. Ophiactis abyssicola (M. Sars, 1861). B. adGP and adGP articulated. C. Radial shield, internal aspect. D–E. adGP, dorsal aspect. F. adGP, ventral aspect. G. abGP, abradial aspect. H. adGP, ventrolateral view (from other, smaller specimen). I. oGP in situ (arrowheads, digital image), oral shield removed. J. Oral shield, internal aspect. K. Madreporite, internal aspect. L. oGP. Scale bars: A, J–L= 0.1 mm; B–I= 0.5 mm.	Fig. 27. Ophiactidae Matsumoto, 1915, SEM, unless otherwise noted. A. Ophiactis savignyi (Müller & Troschel, 1842), genital plates in situ, micro-CT. B–L. Ophiactis abyssicola (M. Sars, 1861). B. adGP and adGP articulated. C. Radial shield, internal aspect. D–E. adGP, dorsal aspect. F. adGP, ventral aspect. G. abGP, abradial aspect. H. adGP, ventrolateral view (from other, smaller specimen). I. oGP in situ (arrowheads, digital image), oral shield removed. J. Oral shield, internal aspect. K. Madreporite, internal aspect. L. oGP. Scale bars: A, J–L= 0.1 mm; B–I= 0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA8D7570042C1591EC0FC25.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198942/files/figure.png	https://doi.org/10.5281/zenodo.11198942	Fig. 28. Ophiopholidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiopholis aculeata (Linnaeus, 1767), SEM, unless otherwise noted. A. Genital plates and radial shield in situ, micro-CT. B–C. Articulated adGP and abGP. D. Radial shield, inner aspect. E. adGP, abradial aspect. F. abGP. G. adGP adradial aspect. H. oGP in situ (arrowheads), digital image. I. oGP. J. Oral shield, inner aspect. K. Madreporite, inner aspect. Scale bars: A, H–K =0.5 mm; B–G =1 mm.	Fig. 28. Ophiopholidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiopholis aculeata (Linnaeus, 1767), SEM, unless otherwise noted. A. Genital plates and radial shield in situ, micro-CT. B–C. Articulated adGP and abGP. D. Radial shield, inner aspect. E. adGP, abradial aspect. F. abGP. G. adGP adradial aspect. H. oGP in situ (arrowheads), digital image. I. oGP. J. Oral shield, inner aspect. K. Madreporite, inner aspect. Scale bars: A, H–K =0.5 mm; B–G =1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFA9D751004BC4751B0EFEAA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198944/files/figure.png	https://doi.org/10.5281/zenodo.11198944	Fig. 29. Ophiotrichidae Ljungman, 1867, Ophiothrix fragilis (Abildgaard in O.F. Müller, 1789), SEM, unless otherwise noted. A. Genital plates and radial shield inside disc, micro-CT. B. Genital plates in situ, ventral aspect. C. adGP, abradial aspect. D. adGP, adradial aspect. E. abGP, abradial aspect. F. abGP, adradial aspect. G. Radial shield, internal aspect. H. Madreporite, internal aspect. I. Oral shield, internal aspect. J. oGP (arrowheads) in situ, ventral aspect, digital image. K. Same, internal dorsal aspect. L. oGP. Scale bars: A–G, J–K =1 mm; H–I, L=0.5 mm.	Fig. 29. Ophiotrichidae Ljungman, 1867, Ophiothrix fragilis (Abildgaard in O.F. Müller, 1789), SEM, unless otherwise noted. A. Genital plates and radial shield inside disc, micro-CT. B. Genital plates in situ, ventral aspect. C. adGP, abradial aspect. D. adGP, adradial aspect. E. abGP, abradial aspect. F. abGP, adradial aspect. G. Radial shield, internal aspect. H. Madreporite, internal aspect. I. Oral shield, internal aspect. J. oGP (arrowheads) in situ, ventral aspect, digital image. K. Same, internal dorsal aspect. L. oGP. Scale bars: A–G, J–K =1 mm; H–I, L=0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFAFD7520012C1C41A75FCF1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198946/files/figure.png	https://doi.org/10.5281/zenodo.11198946	Fig. 30. Ophiothamnidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Histampica duplicata (Lyman, 1875). A–B. Micro CT, all others SEM. A. oGP (arrowheads) in situ, internal dorsal aspect. B. Genital plates in situ. C. adGP. D. abGP. E. adGP, distal end. F. Radial shield, internal aspect. G. Madreporite, internal aspect. Scale bars: A, F=0.5 mm; B–E, G =0.1 mm.	Fig. 30. Ophiothamnidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Histampica duplicata (Lyman, 1875). A–B. Micro CT, all others SEM. A. oGP (arrowheads) in situ, internal dorsal aspect. B. Genital plates in situ. C. adGP. D. abGP. E. adGP, distal end. F. Radial shield, internal aspect. G. Madreporite, internal aspect. Scale bars: A, F=0.5 mm; B–E, G =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFACD75200DDC3E21E24F833.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198948/files/figure.png	https://doi.org/10.5281/zenodo.11198948	Fig. 31. Ophiopsilidae Matsumoto, 1915, Ophiopsila guineensis Koehler, 1914, SEM, unless otherwise noted. A. Genital plates in situ, micro-CT. B. Articulated adGP and abGP. C. adGP, adradial aspect. D. Radial shield, inner aspect. E. adGP, articular structures. F. oGP in situ, bleached, digital image. G. Oral shield, inner aspect. H. Madreporite, inner aspect. I. oGP. Scale bars: A–D, F–H =0.5 mm; E, I =0.1 mm.	Fig. 31. Ophiopsilidae Matsumoto, 1915, Ophiopsila guineensis Koehler, 1914, SEM, unless otherwise noted. A. Genital plates in situ, micro-CT. B. Articulated adGP and abGP. C. adGP, adradial aspect. D. Radial shield, inner aspect. E. adGP, articular structures. F. oGP in situ, bleached, digital image. G. Oral shield, inner aspect. H. Madreporite, inner aspect. I. oGP. Scale bars: A–D, F–H =0.5 mm; E, I =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFADD72C0002C5D41A2BFD1A.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198950/files/figure.png	https://doi.org/10.5281/zenodo.11198950	Fig. 32. Amphilepidida O’Hara, Hugall, Thuy, Stöhr & Martynov, 2017, family incertae sedis, SEM images. A–E. Ophiopus arcticus Ljungman, 1867. A. adGP, abradial aspect. B. adGP, adradial aspect. C. Radial shield, inner aspect.D. Oral shield, inner aspect.E. Madreporite, inner aspect.F–I. Ophienigma spinilimbatum Stöhr & Segonzac, 2005. F. adGP, adradial aspect. G. abGP. H. Radial shield, inner aspect. I. Madreporite, inner aspect. Scale bar: A–I =0.5 mm.	Fig. 32. Amphilepidida O’Hara, Hugall, Thuy, Stöhr & Martynov, 2017, family incertae sedis, SEM images. A–E. Ophiopus arcticus Ljungman, 1867. A. adGP, abradial aspect. B. adGP, adradial aspect. C. Radial shield, inner aspect.D. Oral shield, inner aspect.E. Madreporite, inner aspect.F–I. Ophienigma spinilimbatum Stöhr & Segonzac, 2005. F. adGP, adradial aspect. G. abGP. H. Radial shield, inner aspect. I. Madreporite, inner aspect. Scale bar: A–I =0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFD3D72D0040C11B1D10FAF0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198950/files/figure.png	https://doi.org/10.5281/zenodo.11198950	Fig. 32. Amphilepidida O’Hara, Hugall, Thuy, Stöhr & Martynov, 2017, family incertae sedis, SEM images. A–E. Ophiopus arcticus Ljungman, 1867. A. adGP, abradial aspect. B. adGP, adradial aspect. C. Radial shield, inner aspect.D. Oral shield, inner aspect.E. Madreporite, inner aspect.F–I. Ophienigma spinilimbatum Stöhr & Segonzac, 2005. F. adGP, adradial aspect. G. abGP. H. Radial shield, inner aspect. I. Madreporite, inner aspect. Scale bar: A–I =0.5 mm.	Fig. 32. Amphilepidida O’Hara, Hugall, Thuy, Stöhr & Martynov, 2017, family incertae sedis, SEM images. A–E. Ophiopus arcticus Ljungman, 1867. A. adGP, abradial aspect. B. adGP, adradial aspect. C. Radial shield, inner aspect.D. Oral shield, inner aspect.E. Madreporite, inner aspect.F–I. Ophienigma spinilimbatum Stöhr & Segonzac, 2005. F. adGP, adradial aspect. G. abGP. H. Radial shield, inner aspect. I. Madreporite, inner aspect. Scale bar: A–I =0.5 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFD3D72E000CC5D91DACFC4D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198952/files/figure.png	https://doi.org/10.5281/zenodo.11198952	Fig. 33. Ophiernidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiernus vallincola Lyman, 1878, SEM, unless otherwise noted. A. Genital plates in situ, adGP distally cut off during scan, micro- CT. B. adGP, lateral aspects. C. Radial shield, inner aspect. D. Same, close-up of articular structures. E. Oral shield, inner aspect. F. Madreporite, inner aspect. Scale bars: A–C, E–F =0.5 mm; D =0.1 mm.	Fig. 33. Ophiernidae O’Hara, Stöhr, Hugall, Thuy & Martynov, 2018, Ophiernus vallincola Lyman, 1878, SEM, unless otherwise noted. A. Genital plates in situ, adGP distally cut off during scan, micro- CT. B. adGP, lateral aspects. C. Radial shield, inner aspect. D. Same, close-up of articular structures. E. Oral shield, inner aspect. F. Madreporite, inner aspect. Scale bars: A–C, E–F =0.5 mm; D =0.1 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
038987D9FFD1D7280003C1551D4DFC10.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/11198954/files/figure.png	https://doi.org/10.5281/zenodo.11198954	Fig. 34. Ophioleucidae Matsumoto, 1915, Ophiopallas paradoxa Koehler, 1904, SEM, unless otherwise noted. A. Genital plates in situ, micro-CT. B. adGP, adradial aspect. C. adGP, abradial aspect. D. abGP, arrow connects articular structures to adGP. E. Radial shield, internal aspect. F. Oral GP (arrowheads) in situ, digital image. G. Madreporite, internal aspect (broken during bleaching). H. Oral shield, internal aspect. I. oGP, abradial aspect. J. oGP, adradial aspect. Scale bars: A–H= 0.5 mm; I–J =0.01 mm.	Fig. 34. Ophioleucidae Matsumoto, 1915, Ophiopallas paradoxa Koehler, 1904, SEM, unless otherwise noted. A. Genital plates in situ, micro-CT. B. adGP, adradial aspect. C. adGP, abradial aspect. D. abGP, arrow connects articular structures to adGP. E. Radial shield, internal aspect. F. Oral GP (arrowheads) in situ, digital image. G. Madreporite, internal aspect (broken during bleaching). H. Oral shield, internal aspect. I. oGP, abradial aspect. J. oGP, adradial aspect. Scale bars: A–H= 0.5 mm; I–J =0.01 mm.	2024-05-14	Stöhr, Sabine		Zenodo	biologists	Stöhr, Sabine			
