FIG. 7. — Acritolepis ushakovi n. gen., n in Devonian acanthodians from Severnaya Zemlya Archipelago (Russia)

FIG. 7. — Acritolepis ushakovi n. gen., n. sp., drawings of selected elements of paratypes; A-F, head tesserae, crowns, anterior upwards; A, asymmetrical, two-crowned (LIG 35-2126); B, LIG 35-2125; C, rhombic, two-crowned, small anterior as a secondary scale (LIG 35-2137); D, LIG 35-2129; E, F, two-crowned, sidegrown; E, LIG 35-2127; F, LIG 35-2130; G, trunk scales, arrangement in lines without overlap (LIG 35-2134); H, I, tectal plates, with separated starlet-like striated denticles (H, LIG 35-2136) and with extensively overlaped unornamented tubercles (I, LIG 35-2131); J, K, branchial? cones with tricuspidate denticles, LIG 35-2122 (J) and LIG 35-2123 (K); A, B, D-G, I, from paratype LIG 35-A-371; C, from paratype LIG 35-A-385; J, K, from paratype LIG 35-A-386, Matusevich River, outcrop 1, bed 21, Severnaya Zemlya Formation; H, from paratype LIG 35-A-390, Spokojnaya River, outcrop 41, bed 12, Severnaya Zemlya Formation. Abbreviations: stub, stellate tubercle; tsp, tricuspidate spinelet; tub, tubercle. Scale bar: 1 mm.