Paramblypterus reussii ( HECKEL , 1861)

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 : 173-174

Paramblypterus reussii ( HECKEL, 1861)

Pl. 1, fig. 2

1861 1891 1895 1942

1976

2006

Palaeoniscus Reussii HECK. ; Heckel and Kner, p. 61; fig. 7. Amblypterus reussi (HECKEL) ; Woodward, p. 445.

Amblypterus Reussi (HECK.).; Fritsch, p. 112; fig. 307.

Amblypterus reussi HECKEL. ; Lemke and Weiler, p. 16; pl. 2, fig. 3.

Paramblypterus reussii ( HECKEL, 1861) ; Štamberg, p. 31; figs 19–21; pls. 8–9.

Paramblypterus reussii ( HECKEL 1861) ; Štamberg, p. 225, p. 227.

D i a g n o s i s: Fusiform body gibbous in front of the dorsal fin, not exceeding 30 cm of the total length. Posterior margin of the scales is serrated, area of serrated scales above and below lateral sensory line and number of dents on their posterior margin decline toward the anal fin. Oblong frontals, more than two times longer than wide with only undulating interfrontal suture, and one small process on lateral side of frontals. Parietals are approximately square, two times shorter than the length of the frontals. Triangular dermosphenotic. Distinct sculpture is formed by ridges on the bones of the skull roof. Maxilla with short end and high maxillary plate. The dorsal fin base is opposite to the anal fin base.

T y p e: Holotype M 1215 figured by Heckel ( Heckel and Kner 1861, fig. 7) is deposited at the National Museum , Prague.

L o c a l i t y: Semily, Semily district, Czech Republic.

R e m a r k s: Only the holotype is known. Paramblypterus reussii is very close to P. rohani , and it is distinguished from P. rohani only in having an undulating interfrontal suture, a very short and high maxillary plate and in the position of the dorsal fin, which is above the base of the anal fin ( Štamberg 1976). It is possible to consider whether the position of the dorsal and anal fins was subjected to deformation of the body when preserved, and only the undulation of the interfrontal suture and the shape of the maxilla indicate intraspecific variation ( Dietze 1999). The holotype of P. reussii represents a relatively well-preserved specimen, and all specimens of P. rohani of the same size as P. reussii that I have studied demonstrate an intensively curved interfrontal suture, and exhibit the dorsal fin above the space between the pelvic and anal fins. I continue to separate P. reussii from P. rohani for these reasons.