Fig. 13 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 13. Lingulid brachiopod Linnarssonia bulcurica Pelman in Pelman and Pereladov, 1986 from the middle Cambrian Kuonamka Formation, Malaya Kuonamka and Bol'shaya Kuonamka rivers, Siberia, Russia; sample 1/16.5 (A–D, F, G) and sample 8/32 (E). A–C. Ventral valves, SMNH Br151233– 151235, respectively. A1, external surface; A2, lateral view; A3, close-up showing brephic shell. D, F, G. Dorsal valves, SMNH Br151237–151239, respectively. D2, close-up of the brephic shell; D3, enlargement with pits on the surface. E. Specimen with both valves preserved, SMNH Br151236. E1, external surface; E2, oblique lateral view. Scale bar: 1 mm (A1, A2, B, C, D1, E, F), 500 µm (G), 250 µm (A3, D2), and 12.5 µm (D3).