FIG. 3 in Silurian and Devonian brachiopods from Severnaya Zemlya (Russian Arctic)

FIG. 3. — Rafinesquina? stropheodontoides (Savage, 1913); A, C, partly damaged dorsal valve, showing thickened costellae at different distances from the beak and short undulate rugae (N 6/12991); A, dorsal view; C, enlarged surface sculpturing; B, ventral view of a pedicle valve (N 7/12991), loc. 13A, bed 124, Vodopad Formation. Scale bars: A, B, 6 mm; C, 2 mm.