Fig. 30 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 30. Pelagiellid and khairkhaniid molluscs from the lower Cambrian Erkeket Formation, Khorbusuonka River (A, B, D, E, G, H), Sekten Formation, lower reaches of the Lena River (C, F, I) formations and Kessyusa Group, Khorbusuonka River (J), Siberia, Russia; samples 19/12.75 (A, D, G, H), 19/29 (B), 19/40 (E), 22/50 (C, F, I), and 15/23 (J). A, D. Pelagiella sp. 1, internal moulds, SMNH Mo194738 and 194739, respectively. B, C, E–H. Pelagiella spp., internal moulds, SMNH Mo194740–194745, respectively. E1, apertural view; E2, adapical view. I. Phosphatised wall of Pelagiella sp. cf. Cambretina mareki Horný, 1964, SMNH Mo194746. J. Nomgoliella sinistrovolubilis Missarzhevsky, 1981, internal mould, SMNH Mo194747. J1, apertural view; J2, adapical view. Scale bar: 1 mm (J) and 500 µm (A–I).