taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
03A0162AE944FFAADB04FA0F7F3B1A58.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375020/files/figure.png	https://doi.org/10.5281/zenodo.5375020	FIG. 2. — Strophomena pectenoides (Andreeva, 1961); A, dorsal view of a brachial valve (N 4/12991), loc. 13, bed 112, Vodopad Formation; B, C, brachial valve (N 3/12991); B, dorsal view; C, posterior view; D, surface sculptering of the specimen (N 5/12991), loc. 32, bed 21, Vodopad Formation. Scale bars: A, B, 10 mm; C, D, 2 mm.	FIG. 2. — Strophomena pectenoides (Andreeva, 1961); A, dorsal view of a brachial valve (N 4/12991), loc. 13, bed 112, Vodopad Formation; B, C, brachial valve (N 3/12991); B, dorsal view; C, posterior view; D, surface sculptering of the specimen (N 5/12991), loc. 32, bed 21, Vodopad Formation. Scale bars: A, B, 10 mm; C, D, 2 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE944FFADD8CCFB137F7D1DF4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375024/files/figure.png	https://doi.org/10.5281/zenodo.5375024	FIG. 3. — Rafinesquina? stropheodontoides (Savage, 1913); A, C, partly damaged dorsal valve, showing thickened costellae at different distances from the beak and short undulate rugae (N 6/12991); A, dorsal view; C, enlarged surface sculpturing; B, ventral view of a pedicle valve (N 7/12991), loc. 13A, bed 124, Vodopad Formation. Scale bars: A, B, 6 mm; C, 2 mm.	FIG. 3. — Rafinesquina? stropheodontoides (Savage, 1913); A, C, partly damaged dorsal valve, showing thickened costellae at different distances from the beak and short undulate rugae (N 6/12991); A, dorsal view; C, enlarged surface sculpturing; B, ventral view of a pedicle valve (N 7/12991), loc. 13A, bed 124, Vodopad Formation. Scale bars: A, B, 6 mm; C, 2 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE943FFACD964FBAC79A01B94.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375022/files/figure.png	https://doi.org/10.5281/zenodo.5375022	FIG. 4. — Pentlandina? sp., complete shell (N 8/12991), loc. 29a,?Vodopad Formation; A, posterior view; B, ventral view. Scale bar: 5 mm.	FIG. 4. — Pentlandina? sp., complete shell (N 8/12991), loc. 29a,?Vodopad Formation; A, posterior view; B, ventral view. Scale bar: 5 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE942FFAFDB1FFA0C794B1D54.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375026/files/figure.png	https://doi.org/10.5281/zenodo.5375026	FIG. 5. — Brachyprion ruminatus n. sp.; A, B, pedicle valve (holotype N 9/12991), loc. 11, bed 14A, Samojlovich Formation; A, ventral view; B, lateral view; C, ventral view of an internal mould of a pedicle valve (N 10/12991), loc. 11, bed 14, Samojlovich Formation; D, ventral view of an internal mould of a pedicle valve with well developed impressions of concentric rugae (N 11/12991); E, note the radially arranged pseudopunctae at anterior margin (N 12/12991), loc. 11, bed 20, Samojlovich Formation. Scale bars: A, B, D, 6 mm; C, 5 mm; E, 2 mm.	FIG. 5. — Brachyprion ruminatus n. sp.; A, B, pedicle valve (holotype N 9/12991), loc. 11, bed 14A, Samojlovich Formation; A, ventral view; B, lateral view; C, ventral view of an internal mould of a pedicle valve (N 10/12991), loc. 11, bed 14, Samojlovich Formation; D, ventral view of an internal mould of a pedicle valve with well developed impressions of concentric rugae (N 11/12991); E, note the radially arranged pseudopunctae at anterior margin (N 12/12991), loc. 11, bed 20, Samojlovich Formation. Scale bars: A, B, D, 6 mm; C, 5 mm; E, 2 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE941FFAFDADFFC4C78191B75.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375028/files/figure.png	https://doi.org/10.5281/zenodo.5375028	FIG. 6. — Coolinia gracilis (Andreeva in Nikiforova & Andreeva, 1961); A, ventral view of a pedicle valve (N 13/12991); B, C, dorsal view of a damaged brachial valve (N 14/12991), loc. 29a,?Vodopad Formation. Scale bars: A, B, 6 mm; C, 10 mm.	FIG. 6. — Coolinia gracilis (Andreeva in Nikiforova & Andreeva, 1961); A, ventral view of a pedicle valve (N 13/12991); B, C, dorsal view of a damaged brachial valve (N 14/12991), loc. 29a,?Vodopad Formation. Scale bars: A, B, 6 mm; C, 10 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE941FFAED91CFA6C7FFB1CD4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375030/files/figure.png	https://doi.org/10.5281/zenodo.5375030	FIG. 7. — Morinorhynchus proprius (Lopushinskaya, 1965); A, B, complete shell (N 16/12991), loc. 11, bed 6B, Samojlovich Formation; A, ventral view; B, dorsal view; C, dorsal interior with bilobate cardinal process (N 17/12991), loc. 2, bed 66, Samojlovich Formation. Scale bars: A, B, 5 mm; C, 2 mm.	FIG. 7. — Morinorhynchus proprius (Lopushinskaya, 1965); A, B, complete shell (N 16/12991), loc. 11, bed 6B, Samojlovich Formation; A, ventral view; B, dorsal view; C, dorsal interior with bilobate cardinal process (N 17/12991), loc. 2, bed 66, Samojlovich Formation. Scale bars: A, B, 5 mm; C, 2 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE940FFA0D91BFD2C794F1D14.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375032/files/figure.png	https://doi.org/10.5281/zenodo.5375032	FIG. 8. — Sinochonetes wangi Racheboeuf, 1987; A-C, interior view of pedicle valves (N 18/12991, 19/12991, 20/12991), loc. 21581, Severnaya Zemlya or Pod’’emnaya formations; D, ventral view of a complete valve (N 21/12991); E, external view of a shelly limestone with pedicle and brachial valves; F, L, complete valve (N 22/12991); F, dorsal view; L, posterior views with a pseudodeltidium and chilidium; G, dorsal valve, showing enlarged external surface with a fine striae (N 23/12991); H, posterior view of a pedicle valve, showing a delthyrium, covered by pseudodeltidium posteriorly (N 24/12991); I, K, dorsal valves with well preserved spines near cardinal margin (NN 25/12991, 26/12991); J, internal mould of a dorsal valve, showing a median septum and anderidia (N 27/12991). Scale bars: A-D, 2.5 mm; E, 5 mm; F-K, 2 mm; L, 1 mm.	FIG. 8. — Sinochonetes wangi Racheboeuf, 1987; A-C, interior view of pedicle valves (N 18/12991, 19/12991, 20/12991), loc. 21581, Severnaya Zemlya or Pod’’emnaya formations; D, ventral view of a complete valve (N 21/12991); E, external view of a shelly limestone with pedicle and brachial valves; F, L, complete valve (N 22/12991); F, dorsal view; L, posterior views with a pseudodeltidium and chilidium; G, dorsal valve, showing enlarged external surface with a fine striae (N 23/12991); H, posterior view of a pedicle valve, showing a delthyrium, covered by pseudodeltidium posteriorly (N 24/12991); I, K, dorsal valves with well preserved spines near cardinal margin (NN 25/12991, 26/12991); J, internal mould of a dorsal valve, showing a median septum and anderidia (N 27/12991). Scale bars: A-D, 2.5 mm; E, 5 mm; F-K, 2 mm; L, 1 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE94EFFA0DB3DFCAC7FF61B14.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375034/files/figure.png	https://doi.org/10.5281/zenodo.5375034	FIG. 9. — Dalejina ex gr. hybrida (Sowerby in Murchison, 1839), complete shell (N 2/12991), loc. 13, bed 89, Vodopad Formation; A, ventral view; B, dorsal view; C, lateral view; D, anterior view. Scale bar: 3 mm.	FIG. 9. — Dalejina ex gr. hybrida (Sowerby in Murchison, 1839), complete shell (N 2/12991), loc. 13, bed 89, Vodopad Formation; A, ventral view; B, dorsal view; C, lateral view; D, anterior view. Scale bar: 3 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE94EFFA3D8C6FA2C7BE61BD4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375036/files/figure.png	https://doi.org/10.5281/zenodo.5375036	FIG. 10. — Borealis cristiformis (T. Modzalevskaya, 1985); A, dorsal view of a brachial valve (N 28/12991); B, internal longitudinal ventral septum (N 30/12991); C, D, complete slightly damaged shell (N 29/12991), loc. 14, bed 10b, Vodopad Formation; C, dorsal view; D, lateral view. Scale bars: A, B, 6 mm; C, D, 10 mm.	FIG. 10. — Borealis cristiformis (T. Modzalevskaya, 1985); A, dorsal view of a brachial valve (N 28/12991); B, internal longitudinal ventral septum (N 30/12991); C, D, complete slightly damaged shell (N 29/12991), loc. 14, bed 10b, Vodopad Formation; C, dorsal view; D, lateral view. Scale bars: A, B, 6 mm; C, D, 10 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE94EFFA3D8C6FA2C7BE61BD4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375038/files/figure.png	https://doi.org/10.5281/zenodo.5375038	FIG. 11. — Selected transverse serial sections, illustrating the development of internal structures in Borealis cristiformis (T. Modzalevskaya, 1985) (N 31/12991). Measurements: length 29.1 mm, width 24.0 mm, thickness 22.2 mm; loc. 14, bed 10v, Vodopad Formation. Numbers on selected transverse sections indicate the distances (in mm) from ventral beak. Scale bar: 8 mm.	FIG. 11. — Selected transverse serial sections, illustrating the development of internal structures in Borealis cristiformis (T. Modzalevskaya, 1985) (N 31/12991). Measurements: length 29.1 mm, width 24.0 mm, thickness 22.2 mm; loc. 14, bed 10v, Vodopad Formation. Numbers on selected transverse sections indicate the distances (in mm) from ventral beak. Scale bar: 8 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE94BFFA7D911FA2E79B61B79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375042/files/figure.png	https://doi.org/10.5281/zenodo.5375042	FIG. 14. — A-E, Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya, 1968; A, ventral view; B, dorsal view; C, lateral view; D, anterior view; E, enlarged external surface of a complete shell (N 38/12991), loc. 13, bed 89, Vodopad Formation; F-I, V, Anabaria? latens n. sp.; F, dorsal view; G, ventral view; H, lateral view; I, anterior view of a complete shell (holotype N 50/12991), loc. 11, bed 6B, Samojlovich Formation; V, enlarged external surface of a poorly silicified shell (N 51/12991), loc. 29a,?Vodopad Formation; J-P, R, S, Lenatoechia octjabrensis n. sp.; J, ventral view; K, dorsal view; L, lateral view; M, anterior views of a complete shell (N 41/12991), loc. 11, bed 6B, Samojlovich Formation; N, ventral view; O, dorsal view; P, lateral view of a complete shell (holotype N 40/12991), loc. 2, bed 66, Samojlovich Formation; R, ventral view; S, dorsal view of complete shell (N 42/12991), loc. 117v,?Samojlovich Formation; Q, T, U, Anabaria? latens n. sp.; Q, pedicle valve of a complete shell (N 52/12991), loc. 13, bed 27, Srednij Formation; T, ventral view; U, dorsal view of a complete shell (N 53/12991), loc. 13, bed 64, Golomyannyj Formation. Scale bars: A-D, F-M, 5 mm; E, V, 2 mm; N-U, 3 mm.	FIG. 14. — A-E, Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya, 1968; A, ventral view; B, dorsal view; C, lateral view; D, anterior view; E, enlarged external surface of a complete shell (N 38/12991), loc. 13, bed 89, Vodopad Formation; F-I, V, Anabaria? latens n. sp.; F, dorsal view; G, ventral view; H, lateral view; I, anterior view of a complete shell (holotype N 50/12991), loc. 11, bed 6B, Samojlovich Formation; V, enlarged external surface of a poorly silicified shell (N 51/12991), loc. 29a,?Vodopad Formation; J-P, R, S, Lenatoechia octjabrensis n. sp.; J, ventral view; K, dorsal view; L, lateral view; M, anterior views of a complete shell (N 41/12991), loc. 11, bed 6B, Samojlovich Formation; N, ventral view; O, dorsal view; P, lateral view of a complete shell (holotype N 40/12991), loc. 2, bed 66, Samojlovich Formation; R, ventral view; S, dorsal view of complete shell (N 42/12991), loc. 117v,?Samojlovich Formation; Q, T, U, Anabaria? latens n. sp.; Q, pedicle valve of a complete shell (N 52/12991), loc. 13, bed 27, Srednij Formation; T, ventral view; U, dorsal view of a complete shell (N 53/12991), loc. 13, bed 64, Golomyannyj Formation. Scale bars: A-D, F-M, 5 mm; E, V, 2 mm; N-U, 3 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE94BFFA7D911FA2E79B61B79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375044/files/figure.png	https://doi.org/10.5281/zenodo.5375044	FIG. 15. — Selected transverse serial sections, illustrating the development of internal structures in Lenatoechia octjabrensis n. sp. (N 43/12991). Measurements: length 8.1 mm, width 8.2 mm, thickness 5.9 mm; loc. 2, bed 66, Samojlovich Formation. Numerical designations are the same as on Fig. 11. Scale bar: 3 mm.	FIG. 15. — Selected transverse serial sections, illustrating the development of internal structures in Lenatoechia octjabrensis n. sp. (N 43/12991). Measurements: length 8.1 mm, width 8.2 mm, thickness 5.9 mm; loc. 2, bed 66, Samojlovich Formation. Numerical designations are the same as on Fig. 11. Scale bar: 3 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE949FFA6DAE3FA7579221DD4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375042/files/figure.png	https://doi.org/10.5281/zenodo.5375042	FIG. 14. — A-E, Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya, 1968; A, ventral view; B, dorsal view; C, lateral view; D, anterior view; E, enlarged external surface of a complete shell (N 38/12991), loc. 13, bed 89, Vodopad Formation; F-I, V, Anabaria? latens n. sp.; F, dorsal view; G, ventral view; H, lateral view; I, anterior view of a complete shell (holotype N 50/12991), loc. 11, bed 6B, Samojlovich Formation; V, enlarged external surface of a poorly silicified shell (N 51/12991), loc. 29a,?Vodopad Formation; J-P, R, S, Lenatoechia octjabrensis n. sp.; J, ventral view; K, dorsal view; L, lateral view; M, anterior views of a complete shell (N 41/12991), loc. 11, bed 6B, Samojlovich Formation; N, ventral view; O, dorsal view; P, lateral view of a complete shell (holotype N 40/12991), loc. 2, bed 66, Samojlovich Formation; R, ventral view; S, dorsal view of complete shell (N 42/12991), loc. 117v,?Samojlovich Formation; Q, T, U, Anabaria? latens n. sp.; Q, pedicle valve of a complete shell (N 52/12991), loc. 13, bed 27, Srednij Formation; T, ventral view; U, dorsal view of a complete shell (N 53/12991), loc. 13, bed 64, Golomyannyj Formation. Scale bars: A-D, F-M, 5 mm; E, V, 2 mm; N-U, 3 mm.	FIG. 14. — A-E, Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya, 1968; A, ventral view; B, dorsal view; C, lateral view; D, anterior view; E, enlarged external surface of a complete shell (N 38/12991), loc. 13, bed 89, Vodopad Formation; F-I, V, Anabaria? latens n. sp.; F, dorsal view; G, ventral view; H, lateral view; I, anterior view of a complete shell (holotype N 50/12991), loc. 11, bed 6B, Samojlovich Formation; V, enlarged external surface of a poorly silicified shell (N 51/12991), loc. 29a,?Vodopad Formation; J-P, R, S, Lenatoechia octjabrensis n. sp.; J, ventral view; K, dorsal view; L, lateral view; M, anterior views of a complete shell (N 41/12991), loc. 11, bed 6B, Samojlovich Formation; N, ventral view; O, dorsal view; P, lateral view of a complete shell (holotype N 40/12991), loc. 2, bed 66, Samojlovich Formation; R, ventral view; S, dorsal view of complete shell (N 42/12991), loc. 117v,?Samojlovich Formation; Q, T, U, Anabaria? latens n. sp.; Q, pedicle valve of a complete shell (N 52/12991), loc. 13, bed 27, Srednij Formation; T, ventral view; U, dorsal view of a complete shell (N 53/12991), loc. 13, bed 64, Golomyannyj Formation. Scale bars: A-D, F-M, 5 mm; E, V, 2 mm; N-U, 3 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE949FFA6DAE3FA7579221DD4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375046/files/figure.png	https://doi.org/10.5281/zenodo.5375046	FIG. 16. — Selected transverse serial sections, illustrating the development of internal structures in Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya,1968 (N 39/12991). Measurements: length 7.7 mm, width 10.3 mm, thickness 4.9 mm; loc. 13, bed 89, Vodopad Formation. Numerical designations are the same as on Fig. 11. Scale bar: 2 mm.	FIG. 16. — Selected transverse serial sections, illustrating the development of internal structures in Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya,1968 (N 39/12991). Measurements: length 7.7 mm, width 10.3 mm, thickness 4.9 mm; loc. 13, bed 89, Vodopad Formation. Numerical designations are the same as on Fig. 11. Scale bar: 2 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE948FFB9DACAFB4279A11DF4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375048/files/figure.png	https://doi.org/10.5281/zenodo.5375048	FIG. 17. — Sibiritoechia convexa Alekseeva, 1966, complete shells (NN 44/12991, 45/12991), loc. 21581, Severnaya Zemlya or Pod’’emnaya formations; A, E, ventral view; B, F, dorsal view; C, G, lateral view; D, H, anterior view. Scale bar: 5 mm.	FIG. 17. — Sibiritoechia convexa Alekseeva, 1966, complete shells (NN 44/12991, 45/12991), loc. 21581, Severnaya Zemlya or Pod’’emnaya formations; A, E, ventral view; B, F, dorsal view; C, G, lateral view; D, H, anterior view. Scale bar: 5 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE948FFB9DACAFB4279A11DF4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375050/files/figure.png	https://doi.org/10.5281/zenodo.5375050	FIG. 18. — Selected transverse serial sections, illustrating the development of internal structures in Sibiritoechia convexa Alekseeva, 1966 (N 46/12991). Measurements: length 6.4 mm, width 6.6 mm, thickness 4.1 mm; loc. 21581, Severnaya or Pod’’emnaya formations. Numerical designations are the same as on Fig. 11. Scale bar: 1.9 mm.	FIG. 18. — Selected transverse serial sections, illustrating the development of internal structures in Sibiritoechia convexa Alekseeva, 1966 (N 46/12991). Measurements: length 6.4 mm, width 6.6 mm, thickness 4.1 mm; loc. 21581, Severnaya or Pod’’emnaya formations. Numerical designations are the same as on Fig. 11. Scale bar: 1.9 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE957FFB9DB3BFB8C788A1895.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375052/files/figure.png	https://doi.org/10.5281/zenodo.5375052	FIG. 19. — Selected transverse serial sections, illustrating the development of internal structures in Dihelictera cf. lepidota (Nikiforova & T. Modzalevskaya, 1968); A, ventral valve (N 48/12991), length 10.2 mm, loc. 2, bed 79, Samojlovich Formation; B, dorsal valve (N 49/12991), length 10.0 mm; loc. 11, bed 14, Samojlovich Formation. Numerical designations are the same as on Fig. 11. Scale bar: 2.3 mm.	FIG. 19. — Selected transverse serial sections, illustrating the development of internal structures in Dihelictera cf. lepidota (Nikiforova & T. Modzalevskaya, 1968); A, ventral valve (N 48/12991), length 10.2 mm, loc. 2, bed 79, Samojlovich Formation; B, dorsal valve (N 49/12991), length 10.0 mm; loc. 11, bed 14, Samojlovich Formation. Numerical designations are the same as on Fig. 11. Scale bar: 2.3 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE957FFB9DB3BFB8C788A1895.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375056/files/figure.png	https://doi.org/10.5281/zenodo.5375056	FIG. 21. — A-H, Anulatrypa nieczlawiensis tenuicostata Tcherkesova in Modzalevskaya & Cherkesova, 1994; A, E, ventral view; B, F, dorsal view; C, G, lateral view; D, H, anterior view of a young and adult complete shells (N 55/12991, 56/12991), loc. 18095, Rusanov Formation; I, Dihelictera cf. lepidota (Nikiforova & T. Modzalevskaya, 1968), ventral view of a pedicle valve (N 47/12991), loc. 2, bed 79, Samojlovich Formation. Scale bars: A-D, I, 5 mm; E-H, 6 mm.	FIG. 21. — A-H, Anulatrypa nieczlawiensis tenuicostata Tcherkesova in Modzalevskaya & Cherkesova, 1994; A, E, ventral view; B, F, dorsal view; C, G, lateral view; D, H, anterior view of a young and adult complete shells (N 55/12991, 56/12991), loc. 18095, Rusanov Formation; I, Dihelictera cf. lepidota (Nikiforova & T. Modzalevskaya, 1968), ventral view of a pedicle valve (N 47/12991), loc. 2, bed 79, Samojlovich Formation. Scale bars: A-D, I, 5 mm; E-H, 6 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE956FFBAD947FCE97AAA1895.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375042/files/figure.png	https://doi.org/10.5281/zenodo.5375042	FIG. 14. — A-E, Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya, 1968; A, ventral view; B, dorsal view; C, lateral view; D, anterior view; E, enlarged external surface of a complete shell (N 38/12991), loc. 13, bed 89, Vodopad Formation; F-I, V, Anabaria? latens n. sp.; F, dorsal view; G, ventral view; H, lateral view; I, anterior view of a complete shell (holotype N 50/12991), loc. 11, bed 6B, Samojlovich Formation; V, enlarged external surface of a poorly silicified shell (N 51/12991), loc. 29a,?Vodopad Formation; J-P, R, S, Lenatoechia octjabrensis n. sp.; J, ventral view; K, dorsal view; L, lateral view; M, anterior views of a complete shell (N 41/12991), loc. 11, bed 6B, Samojlovich Formation; N, ventral view; O, dorsal view; P, lateral view of a complete shell (holotype N 40/12991), loc. 2, bed 66, Samojlovich Formation; R, ventral view; S, dorsal view of complete shell (N 42/12991), loc. 117v,?Samojlovich Formation; Q, T, U, Anabaria? latens n. sp.; Q, pedicle valve of a complete shell (N 52/12991), loc. 13, bed 27, Srednij Formation; T, ventral view; U, dorsal view of a complete shell (N 53/12991), loc. 13, bed 64, Golomyannyj Formation. Scale bars: A-D, F-M, 5 mm; E, V, 2 mm; N-U, 3 mm.	FIG. 14. — A-E, Stegerhynchus? decemplicatus duplex Nikiforova & T. Modzalevskaya, 1968; A, ventral view; B, dorsal view; C, lateral view; D, anterior view; E, enlarged external surface of a complete shell (N 38/12991), loc. 13, bed 89, Vodopad Formation; F-I, V, Anabaria? latens n. sp.; F, dorsal view; G, ventral view; H, lateral view; I, anterior view of a complete shell (holotype N 50/12991), loc. 11, bed 6B, Samojlovich Formation; V, enlarged external surface of a poorly silicified shell (N 51/12991), loc. 29a,?Vodopad Formation; J-P, R, S, Lenatoechia octjabrensis n. sp.; J, ventral view; K, dorsal view; L, lateral view; M, anterior views of a complete shell (N 41/12991), loc. 11, bed 6B, Samojlovich Formation; N, ventral view; O, dorsal view; P, lateral view of a complete shell (holotype N 40/12991), loc. 2, bed 66, Samojlovich Formation; R, ventral view; S, dorsal view of complete shell (N 42/12991), loc. 117v,?Samojlovich Formation; Q, T, U, Anabaria? latens n. sp.; Q, pedicle valve of a complete shell (N 52/12991), loc. 13, bed 27, Srednij Formation; T, ventral view; U, dorsal view of a complete shell (N 53/12991), loc. 13, bed 64, Golomyannyj Formation. Scale bars: A-D, F-M, 5 mm; E, V, 2 mm; N-U, 3 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE956FFBAD947FCE97AAA1895.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375054/files/figure.png	https://doi.org/10.5281/zenodo.5375054	FIG. 20. — Selected transverse serial sections, illustrating the development of internal strutures in Anabaria? latens n. sp. (N 54/12991). Measurements: length 8.7 mm, width 8.7 mm, thickness 6.2 mm; loc. 13, bed 64, Golomyannyj Formation. Numerical designations are the same as on Fig. 11. Scale bar: 3.2 mm.	FIG. 20. — Selected transverse serial sections, illustrating the development of internal strutures in Anabaria? latens n. sp. (N 54/12991). Measurements: length 8.7 mm, width 8.7 mm, thickness 6.2 mm; loc. 13, bed 64, Golomyannyj Formation. Numerical designations are the same as on Fig. 11. Scale bar: 3.2 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE954FFBDD91DFB6C795C1A94.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375056/files/figure.png	https://doi.org/10.5281/zenodo.5375056	FIG. 21. — A-H, Anulatrypa nieczlawiensis tenuicostata Tcherkesova in Modzalevskaya & Cherkesova, 1994; A, E, ventral view; B, F, dorsal view; C, G, lateral view; D, H, anterior view of a young and adult complete shells (N 55/12991, 56/12991), loc. 18095, Rusanov Formation; I, Dihelictera cf. lepidota (Nikiforova & T. Modzalevskaya, 1968), ventral view of a pedicle valve (N 47/12991), loc. 2, bed 79, Samojlovich Formation. Scale bars: A-D, I, 5 mm; E-H, 6 mm.	FIG. 21. — A-H, Anulatrypa nieczlawiensis tenuicostata Tcherkesova in Modzalevskaya & Cherkesova, 1994; A, E, ventral view; B, F, dorsal view; C, G, lateral view; D, H, anterior view of a young and adult complete shells (N 55/12991, 56/12991), loc. 18095, Rusanov Formation; I, Dihelictera cf. lepidota (Nikiforova & T. Modzalevskaya, 1968), ventral view of a pedicle valve (N 47/12991), loc. 2, bed 79, Samojlovich Formation. Scale bars: A-D, I, 5 mm; E-H, 6 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE953FFBCDB1EFB0C794F1A5C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375058/files/figure.png	https://doi.org/10.5281/zenodo.5375058	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE953FFBCDB1EFB0C794F1A5C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375061/files/figure.png	https://doi.org/10.5281/zenodo.5375061	FIG. 23. — Selected transverse serial sections, illustrating the development of internal structures in Dubaria tenera Nikiforova & T. Modzalevskaya, 1968 (N 15/12991). Measurements: length 5.6 mm, width 8.0 mm, thickness 4.5 mm; loc. 13, bed 64, Golomyannyj Formation. Numerical designations are the same as on Fig. 11. Scale bar: 10 mm.	FIG. 23. — Selected transverse serial sections, illustrating the development of internal structures in Dubaria tenera Nikiforova & T. Modzalevskaya, 1968 (N 15/12991). Measurements: length 5.6 mm, width 8.0 mm, thickness 4.5 mm; loc. 13, bed 64, Golomyannyj Formation. Numerical designations are the same as on Fig. 11. Scale bar: 10 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE952FFBFD8C1FC6C7ABC1B94.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375063/files/figure.png	https://doi.org/10.5281/zenodo.5375063	FIG. 24. — A, Eohowellella sp., ventral view of a pedicle valve (N 64/12991), loc. 2, bed 79, Samojlovich Formation; B-F, Reticulariopsis talenti Lenz & Johnson, 1985; B, ventral view; C, dorsal view; D, lateral view; E, posterior view of a complete shell (N 65/12991); F, posterior view of a complete shell (N 66/12991), showing delthyrium, loc. 21581, Severnaya Zemlya or Pod’’emnaya formations. Scale bar: A, 5 mm; B-E, 2 mm; F, 2.5 mm.	FIG. 24. — A, Eohowellella sp., ventral view of a pedicle valve (N 64/12991), loc. 2, bed 79, Samojlovich Formation; B-F, Reticulariopsis talenti Lenz & Johnson, 1985; B, ventral view; C, dorsal view; D, lateral view; E, posterior view of a complete shell (N 65/12991); F, posterior view of a complete shell (N 66/12991), showing delthyrium, loc. 21581, Severnaya Zemlya or Pod’’emnaya formations. Scale bar: A, 5 mm; B-E, 2 mm; F, 2.5 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE952FFBFD8C1FC6C7ABC1B94.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375065/files/figure.png	https://doi.org/10.5281/zenodo.5375065	FIG. 25. — Selected transverse serial sections, illustrating the development of internal structures in Reticulariopsis talenti Lenz & Johnson, 1985 (N 67/12991). Measurements: length 5.1 mm, width 6.3 mm, thickness 4.0 mm; loc. 21581, Severnaya Zemlya or Pod’’emnaya formations. Numerical designations are the same as on Fig. 11. Scale bar: 1.4 mm.	FIG. 25. — Selected transverse serial sections, illustrating the development of internal structures in Reticulariopsis talenti Lenz & Johnson, 1985 (N 67/12991). Measurements: length 5.1 mm, width 6.3 mm, thickness 4.0 mm; loc. 21581, Severnaya Zemlya or Pod’’emnaya formations. Numerical designations are the same as on Fig. 11. Scale bar: 1.4 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE951FFB0DAFAFA3C7A7E1894.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375067/files/figure.png	https://doi.org/10.5281/zenodo.5375067	FIG. 26. — Undispirifer? obsoletiplicatus n. sp.; A-C, ventral view of different sizes pedicle valves; A, N 69/12991; B, holotype (N 68/12991); C, N 70/12991; D, E, dorsal view of a brachial valve (NN 71/12991, 72/12991); F, posterior view of a pedicle valve with interarea and open delthyrium (N 73/12991); G, H, external moulds of pedicle valves, showing a well developed muscle field and gonad impressions (NN 74/12991, 75/12991), loc. 215581, Severnaya Zemlya or Pod’’emnaya formations. Scale bars: A-E, 6 mm; F-H, 5 mm.	FIG. 26. — Undispirifer? obsoletiplicatus n. sp.; A-C, ventral view of different sizes pedicle valves; A, N 69/12991; B, holotype (N 68/12991); C, N 70/12991; D, E, dorsal view of a brachial valve (NN 71/12991, 72/12991); F, posterior view of a pedicle valve with interarea and open delthyrium (N 73/12991); G, H, external moulds of pedicle valves, showing a well developed muscle field and gonad impressions (NN 74/12991, 75/12991), loc. 215581, Severnaya Zemlya or Pod’’emnaya formations. Scale bars: A-E, 6 mm; F-H, 5 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE951FFB0DAFAFA3C7A7E1894.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375069/files/figure.png	https://doi.org/10.5281/zenodo.5375069	FIG. 27. — Selected transverse serial sections, illustrating the development of internal structures in Undispirifer? obsoletiplicatus n. sp.; A, ventral valve (N 76/12991), length 17.3 mm, width 12.0? mm; B, dorsal valve (N 77/12991), length 14.7 mm, width 19.9 mm; loc. 21581, Severnaya Zemlya or Pod’’emnaya formations. Numerical designations are the same as on Fig. 11. Scale bar: 2.3 mm.	FIG. 27. — Selected transverse serial sections, illustrating the development of internal structures in Undispirifer? obsoletiplicatus n. sp.; A, ventral valve (N 76/12991), length 17.3 mm, width 12.0? mm; B, dorsal valve (N 77/12991), length 14.7 mm, width 19.9 mm; loc. 21581, Severnaya Zemlya or Pod’’emnaya formations. Numerical designations are the same as on Fig. 11. Scale bar: 2.3 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE95EFFB3D95EFB577F6E1894.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375071/files/figure.png	https://doi.org/10.5281/zenodo.5375071	FIG. 28. — Grebenella laciniatus n. sp.; A, ventral view; B, dorsal view; C, lateral view; D, posterior view of a complete shell (N 79/12991), loc. 21581, Severnaya Zemlya or Pod’’mnaya formations; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 78/12991); I, ventral interior with dental lamellae and muscle field (N 80/12991), Severnaya Zemlya or Pod’’emnaya formations; J, enlarged external surface of a ventral valve, showing concentric growth lines with the impressions of the spines (N 81/12991), loc. 20399, Rusanov or Al’banov formations. Scale bars: A-D, 5 mm; E-H, 3 mm; I, J, 2 mm.	FIG. 28. — Grebenella laciniatus n. sp.; A, ventral view; B, dorsal view; C, lateral view; D, posterior view of a complete shell (N 79/12991), loc. 21581, Severnaya Zemlya or Pod’’mnaya formations; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 78/12991); I, ventral interior with dental lamellae and muscle field (N 80/12991), Severnaya Zemlya or Pod’’emnaya formations; J, enlarged external surface of a ventral valve, showing concentric growth lines with the impressions of the spines (N 81/12991), loc. 20399, Rusanov or Al’banov formations. Scale bars: A-D, 5 mm; E-H, 3 mm; I, J, 2 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE95EFFB3D95EFB577F6E1894.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375073/files/figure.png	https://doi.org/10.5281/zenodo.5375073	FIG. 29. — Selected transverse serial sections, illustrating in the development of internal structures in Grebenella laciniatus n. sp. (N 82/12991). Measurements: length 6.8 mm, width?, thickness?; loc. 20399, Rusanov or Al’banov formations. Numerical designations are the same as on Fig. 11. Scale bar: 1.6 mm.	FIG. 29. — Selected transverse serial sections, illustrating in the development of internal structures in Grebenella laciniatus n. sp. (N 82/12991). Measurements: length 6.8 mm, width?, thickness?; loc. 20399, Rusanov or Al’banov formations. Numerical designations are the same as on Fig. 11. Scale bar: 1.6 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE95CFFB5DB04FBAC7A6C1C34.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375058/files/figure.png	https://doi.org/10.5281/zenodo.5375058	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE95CFFB5DB04FBAC7A6C1C34.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375075/files/figure.png	https://doi.org/10.5281/zenodo.5375075	FIG. 30. — Selected transverse serial sections, illustrating the development of internal structures in Hyattidina remota n. sp. (N 60/12991). Measurements: length 6.8 mm, width 8.4 mm, thickness 5.0 mm; loc. 13, bed 48, Golomyannyj Formation. Numerical designations are the same as on Fig. 11. Scale bar: 5 mm.	FIG. 30. — Selected transverse serial sections, illustrating the development of internal structures in Hyattidina remota n. sp. (N 60/12991). Measurements: length 6.8 mm, width 8.4 mm, thickness 5.0 mm; loc. 13, bed 48, Golomyannyj Formation. Numerical designations are the same as on Fig. 11. Scale bar: 5 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE95BFFB5DB1CFA2F782E1895.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375058/files/figure.png	https://doi.org/10.5281/zenodo.5375058	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE95BFFB5DB1CFA2F782E1895.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375077/files/figure.png	https://doi.org/10.5281/zenodo.5375077	FIG. 31. — Selected transverse serial sections, illustrating the development of internal structures in Greenfieldia orbiculata n. sp. (N 63/12991). Measurements: length 10.9 mm, width 9.1 mm, thickness 9.2 mm; loc. 2, bed 66, Samojlovich Formation. Numerical designations are the same as on Fig. 11. Scale bar: 2.7 mm.	FIG. 31. — Selected transverse serial sections, illustrating the development of internal structures in Greenfieldia orbiculata n. sp. (N 63/12991). Measurements: length 10.9 mm, width 9.1 mm, thickness 9.2 mm; loc. 2, bed 66, Samojlovich Formation. Numerical designations are the same as on Fig. 11. Scale bar: 2.7 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
03A0162AE95BFFB5DB24FD6E794B1BB4.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5375058/files/figure.png	https://doi.org/10.5281/zenodo.5375058	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	FIG. 22. — A-D, Hyattidina remota n. sp.; A, ventral view; B, dorsal view; C, anterior view of a complete shell (holotype N 58/12991); D, lateral view of a complete shell (N 59/12991), loc. 13, bed 48, Golomyannyj Formation; E-H, Greenfieldia orbiculata n. sp.; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 62/12991), loc. 2, bed 66, Samojlovich Formation; I, Meristina? norilica (Nikiforova in Nikiforova & Andreeva, 1961), ventral view of a complete shell (N 61/12991), loc. 13, bed 27, Srednij Formation; J-M, Dubaria tenera Nikiforova & T. Modzalevskaya, 1968; J, ventral view; K, dorsal view; L, lateral view; M, anterior view of a complete shell (N 57/12991), loc. 13, bed 89, Vodopad Formation. Scale bars: A-C, E-H, 5 mm; D, J-M, 3 mm; I, 6 mm.	2003-12-31	Modzalevskaya, Tatiana L.		Zenodo	biologists	Modzalevskaya, Tatiana L.			
