Fig. 50 in An early Cambrian fauna of skeletal fossils from the Emyaksin Formation, northern Siberia

Fig. 50. Problematicum Rhombocorniculum insolutum Missarzhevsky in Missarzhevsky and Mambetov, 1981 from lower Cambrian Emyaksin Formation, Bol'shaya Kuonamka River, Anabar Uplift, Siberia; sample 7/19. A. Sclerite with twinned apical parts, SMNH X 4727; A1, oblique lateral view; A2, close-up of A1; A3, close-up of basal end showing microstructure; A4–A6, lateral views; A7, oblique apical view. B. SMNH X 4728; lateral view. C. SMNH X 4729; C1, general view; C2, view on the transversally compressed sclerite. D. SMNH X 4730; D1 and D2, lateral views. Scale bar: A1, A2, A4, A5, A7, 120 μm; A3, 30 μm; A6, B–D, 300 μm.