Fig. 5 in The new stem-group brachiopod Oymurania from the lower Cambrian of Siberia

Fig. 5. Stem group-brachiopod Oymurania gravestocki Ushatinskaya gen. et sp. nov., cyrtoconic (presumably ventral) valves, from the lower Cambrian Emyaksin Formation, Bol'shaya Kuonamka section 7, Siberia. A. SMNH X5285, sample 7/33; upper (A 1), oblique lateral (A 2), and apical (A 4) views; close-up of A 1 showing fine pores (A 3). B. SMNH X5286, sample 7/47.7; subapical (B 1), lateral (B 2), and upper (B 3) views. Scale bar 600 μm, except A 3, 15 μm, A , 300 μm.