Fig. 30 in An early Cambrian fauna of skeletal fossils from the Emyaksin Formation, northern Siberia

Fig. 30. Hyolith opercula from lower Cambrian Emyaksin Formation, Malaya Kuonamka River, Anabar Uplift, Siberia; sample K1-3B. A. Operculum type 1, SMNH X 4650; dorsal (A 1), inner (A 2), and lateral (A 3) views. B, F. Operculum type 2. B. SMNH X 4651; dorsal (B 1), lateral (B 2), inner (B 3), and oblique ventral (B 4) views. F. SMNH X 4652; lateral (F 1), inner (F 2), and ventral (F 3) views. C–E. Operculum type 3, SMNH X 4653 (C), SMNH X 4654 D), and SMNH X 4668 (E); inner (C, D , E) and oblique lateral (D ) views. Scale bar 600 μm.