FIG. 28. — Grebenella laciniatus n in Silurian and Devonian brachiopods from Severnaya Zemlya (Russian Arctic)

FIG. 28. — Grebenella laciniatus n. sp.; A, ventral view; B, dorsal view; C, lateral view; D, posterior view of a complete shell (N 79/12991), loc. 21581, Severnaya Zemlya or Pod''mnaya formations; E, ventral view; F, dorsal view; G, lateral view; H, anterior view of a complete shell (holotype N 78/12991); I, ventral interior with dental lamellae and muscle field (N 80/12991), Severnaya Zemlya or Pod''emnaya formations; J, enlarged external surface of a ventral valve, showing concentric growth lines with the impressions of the spines (N 81/12991), loc. 20399, Rusanov or Al'banov formations. Scale bars: A-D, 5 mm; E-H, 3 mm; I, J, 2 mm.