Fig. 26. Bivalve mollusc Fordilla sibirica Krasilova, 1977 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 26. Bivalve mollusc Fordilla sibirica Krasilova, 1977, from the lower Cambrian Erkeket Formation, Khorbusuonka River, Siberia, Russia; sample 19/12.75. A–C. Internal moulds, SMNH Mo194719, 167596, and 194720, respectively. A1, B1, C, lateral view; A2, dorsal view, A3–A5, B2–B4, close-ups showing surface textures. Scale bar: 830 µm (C), 500 µm (A1, A2, B1), 100 µm (A3–A5, B2–B4).