FIG. 4. — Acritolepis ushakovi n. gen., n in Devonian acanthodians from Severnaya Zemlya Archipelago (Russia)

FIG. 4. — Acritolepis ushakovi n. gen., n. sp., Severnaya Zemlya Formation; A, paratype (LIG 35-A-384), lateral view, dorsal fin spines and squamation, anterior to right; B, magnified anterior dorsal fin spine of the same specimen; C, posterior dorsal fin spine with enlarged asymmetrical scales of the same specimen, Spokojnaya River, outcrop 41, bed 12; D, branchial? cone (LIG 35-2099) from the paratype LIG 35-A-386, Matusevich River, outcrop 1, bed 21; E, enlarged area of squamation with myomeric structures in the central part of paratype LIG 35-A-384, dorsal view, Spokojnaya River, outcrop 41, bed 12. Abbreviations: adfs, anterior dorsal fin spine; ascl, asymmetric magnified scales; con, branchial? cone; pdfs, posterior dorsal fin spine; sq, squamation. Scale bars: A-C, 10 mm; D, E, 1 mm.