Fig. 19 in An early Cambrian fauna of skeletal fossils from the Emyaksin Formation, northern Siberia

Fig. 19. Comparison of internal moulds of two pelagiellid molluscs Pelagiella sp. 1 (A) and Pelagiella sp. 2 (B, C) from lower Cambrian Emyaksin Formation, Bol'shaya Kuonamka River, Anabar Uplift, Siberia; sample 7/70. A. SMNH Mo 167685; sub-apical (A1), apertural (A2), and spiral side (A3) views. B. SMNH Mo 167686; sub-apical (B1), apertural (B2), and spiral side (B3) views. C. SMNH Mo 167687; sub-apical (C1), umbilical side (C2), apertural (C3), and spiral side (C4) views. Scale bar 600 μm.