FIG. 21. — A-H in Silurian and Devonian brachiopods from Severnaya Zemlya (Russian Arctic)

FIG. 21. — A-H, Anulatrypa nieczlawiensis tenuicostata Tcherkesova in Modzalevskaya & Cherkesova, 1994; A, E, ventral view; B, F, dorsal view; C, G, lateral view; D, H, anterior view of a young and adult complete shells (N 55/12991, 56/12991), loc. 18095, Rusanov Formation; I, Dihelictera cf. lepidota (Nikiforova & T. Modzalevskaya, 1968), ventral view of a pedicle valve (N 47/12991), loc. 2, bed 79, Samojlovich Formation. Scale bars: A-D, I, 5 mm; E-H, 6 mm.