Fig. 10 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 10. Lingulid brachiopod Homotreta gorjanskii (Pelman, 1973), SMNH Br151211, from the middle Cambrian Kuonamka Formation, Malaya Kuonamka River, Siberia, Russia; sample 1/28. A1, dorsal valve; A2, close-up of A1; A3, A4, enlargements of anterior margin with mantle canals. Scale bar: 500 µm (A1), 125 µm (A2), 60 µm (A3), 17 µm (A4).