FIG. 5. — Acritolepis ushakovi n. gen., n in Devonian acanthodians from Severnaya Zemlya Archipelago (Russia)

FIG. 5. — Acritolepis ushakovi n. gen., n. sp.; A, palatine tooth with bony base (LIG 35-2103); B-D, denticulate tesserae-scales of one-sided areal growth, crowns; B, LIG 35-2106; C, LIG 35-2105; D, LIG 35-2100; E-G, polyodontode-type tesserae of areal growth from the head area, crowns; E, LIG 35-2104; F, LIG 35-2102; G, LIG 35-2101, paratype LIG 35-A-386, Matusevich River, outcrop 1, bed 21; H-O, scales; A-G, scales from the paratype LIG 35-A-404, Spokojnaya River, outcrop 41, bed 12, Severnaya Zemlya Formation; H, LIG 35-2047, normal trunk scale, crown; I, LIG 35-2045, side view; J, LIG 35-2041, scale from the tail area, crown; K, LIG 35-2044, specialized asymmetrical tessera-like scale, crown; L, LIG 35-2042, trunk scale, side view; M, LIG 35-2046, asymmetrical scale, crown; N, LIG 35-2040, scale from the tail area, crown; O, LIG 35-2039, trunk scale, crown. Scale bars: 1 mm.