Sphaerolepis FRIČ , 1877

Štamberg, Stanislav, 2013, Knowledge Of The Carboniferous And Permian Actinopterygian Fishes Of The Bohemian Massif - 100 Years After Antonín Frič, Acta Musei Nationalis Pragae Series B 69 (3 - 4), pp. 159-182 : 166-167

Genus Sphaerolepis FRIČ, 1877

T y p e s p e c i e s: Sphaerolepis kounoviensis FRIČ, 1877 .

I n c l u d e d s p e c i e s: Type species only.

D i a g n o s i s (after Štamberg 1991, emended): Body fusiform reaching a total length of 15 cm. Paired fins small, pectoral fins composed of 11–12 lepidotrichia, pelvic fin of 14–15 lepidotrichia. Dorsal fin with short base consists of 15–19 lepidotrichia, and placed opposite the space between the pelvic and anal fins. Anal fin consists of 19 lepidotrichia, caudal fin not deeply cleft, with long and slender dorsal lobe. All fins have stout basal fulcra forming their leading edges, and the dorsal edge of the caudal fin. Fringing fulcra are absent. Lepidotrichia of all fins segmented. Head anterior bluntly terminated, not conspicuously convex. Paired extrascapular lateral and unpaired extrascapular medial present. Square parietal, frontal one-third longer than parietal. Small triangular dermosphenotic. Parasphenoid with one pair of processus ascendens posterior, posteriorly elongated corpus parasphenoidis same length as the anterior part of corpus parasphenoidis anteriorly from the buccohypophysial foramen. Vomers and dermal bones on medial face of the palatoquadratum, with well developed teeth. Suborbital bones present. Maxillary plate short and high, the length/height ratio is 0.8–1.1. Lower jaw strong, moderately curved anteriorly. Dentition comprises numerous, relatively stout, sharp pointed teeth. Preoperculum not conspicuously bent anteriorly, obliqueness angle of preoperculum is 65–70°. Operculum large, moderately dorsoventrally elongated. Operculum obliqueness angle is 80°. Suboperculum is not developed, no more than five branchiostegal rays. Scales covering the trunk are cycloidal, except those on the dorsal lobe of the caudal fin and on the part of the caudal peduncle, which are rhombic. Cycloidal scales are thin, sculpture is formed on overlapped part by concentrically arranged lines which terminated posteriorly in small sharp pointed tubercles on uncovered part of the scale. Scale count

18

32

6 16 29