FIG. 27. — A, B in Devonian acanthodians from Severnaya Zemlya Archipelago (Russia)

FIG. 27. — A, B, Nostolepis sp. cf. N. gracilis Gross, 1947, scales, crowns, anterior upwards; A, LIG 35-2068; B, LIG 35-2067; Matusevich River, outcrop 4, bed 3, Pod"emnaya Formation; C-E, Nostolepis taimyrica Valiukevicius, 1994, scales, crowns, anterior upwards; C, LIG 35-2021; D, LIG 35-1971; E, LIG 35-1996; Pioneer Island, sample P-10-1 (C, D), Lower Devonian, Member 8 and Ushakov River, outcrop 25, bed 1 (E), lower Al'banov Subformation; F, G, Nostolepis striata Pander, 1856, scales, crowns, anterior upwards; F, LIG 35-2012; G, LIG 35-2011; Matusevich River, outcrop 4, bed 3, Pod"emnaya Formation; H-K, Nostolepis sp. cf. N. multicostata Vieth, 1980; H, I, scales, crowns, anterior upwards; H, LIG 35-1983; I, LIG 35-2010; J, LIG 35-1979, jawbone fragment with main tooth cusps; K, LIG 35-1977, spine fragment, lateral view, anterior to left; Spokojnaya River, the right bank outcrop – analogues of outcrop 4, higher the 11th bed on the Matusevich River (H) and Matusevich River, outcrop 4, bed 3, Pod"emnaya Formation; L, M, Nostolepis sp. cf. N. multangula Valiukevicius, 1994, scales, oblique crown-side views, anterior upwards (L) and downwards (M); L, LIG 35-2018; M, LIG 35-1992; Pioneer Island, outcrop 980, sample 980a, age unidentified (L) and Spokojnaya River, outcrop 48, bed 5 (M), lower Al'banov Subformation; N, O, Tareyacanthus sp. cf. T. dissectus Valiukevicius, 1994, scales, crowns, anterior upwards; N, LIG 35-2004; O, LIG 35-1972. Pioneer Island, sample P-9-1 (N) and P-10-1 (O); Lower Devonian, Member 8; P, Q, Cheiracanthoides borealis Valiukevicius, 1994, scales, crowns, anterior upwards; P, LIG 35-2001; Q, LIG 35-1780; Pioneer Island, sample P-9-1 (P) and P-10-1 (Q), Lower Devonian, Member 8; R, Cheiracanthoides comptus Wells, 1944, scale, crown, anterior upwards, LIG 35-1973; Pioneer Island, sample P-10-1, Lower Devonian, Member 8. Scale bars: 0.5 mm.