Sceletophorus biserialis FRITSCH , 1894

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

Sceletophorus biserialis FRITSCH, 1894

Text-fig. 2 , fig. 5

1894

1894

1894

1936 1966 1967 1983

1991 Sceletophorus biserialis, FR. ; Fritsch, Band 3, p. 88, figs 281–286, pls. 116, 117, fig. 3.

Phanerosteon pauper, FR. ; Fritsch, Band 3, p. 92, fig. 287, pl. 117, figs 1–4.

Amblypterus verrucosus, FR. ; Fritsch, partim, Band 3, fig. 290.

Gymnoniscus pauper ; BERG, p. 345.

Gymnoniscus pauper (FRIČ) ; Lehman, p. 78, p. 79.

Sceletophorus biserialis FRIČ ; Gardiner, p. 169, figs 19–21. Sceletophorus biserialis FRIČ, 1895 ; Štamberg, p. 44, figs 1–10.

Sceletophorus biserialis FRIČ, 1895 ; Štamberg, p. 88, figs 49–51, pls. 19, 20.

L e c t o t y p e ( Štamberg 1983): specimen figured by Fritsch (1894) on pl. 116, fig. 3, pl. 117, fig. 5 and text-figs 284, 285, deposited in the National Museum, Prague under No. M 1202.

T y p e l o c a l i t y: Třemošná, district Plzeň.

S t r a t u m t y p i c u m: Nýřany Member, Westphalian D, Upper Carboniferous.

S t r a t i g r a p h i c a l r a n g e: Westphalian D.

O c c u r r e n c e: Třemošná, Nýřany.

D i a g n o s i s ( Štamberg 1983, emended): Body slender, fusiform, attaining a length 10 cm. Interparietal and interfrontal sutures are straight. Segments of lepidotrichia always longer than wide. The longest lepidotrichia of the anal fin composed of 14 – 18 segments. The longest lepidotrichia of the caudal fin’s ventral lobe have a maximum of 20 segments. The scale count

21

35

6 19 30

R e m a r k s: Phanerosteon pauper FRITSCH, 1894 is a juvenile specimen of Sceletophorus biserialis . For that reason, the newly erected genus Gymnoniscus by Berg (1936), on the basis of Phanerosteon pauper FRITSCH, 1894 , is considered to be synonymous with Sceletophorus biserialis ( Westoll 1944, Gardiner 1967, Štamberg 1991). Additionally, one specimen of Amblypterus verrucossus ( Fritsch 1894, fig. 290) was reclassified ( Štamberg 1983, 1991) to Sceletophorus biserialis . Fritsch (1894) assigned the species name biserialis for the presence of two lateral sensory lines on each side of the body. In fact, though there is a single lateral sensory line on each side of the body that is very conspicuous, an impression of this line from the opposite side of the body may also be seen on some specimens.

Figures

Text-fig. 2. Reconstruction of some Westphalian and Stephanian actinopterygians. Figs 1 – 5 after Štamberg (1991), Fig. 6 after Westoll (1944). Scale bars represent 20 mm. 1 – Acrolepis gigas (FRIČ, 1877), 2 – “Elonichthys” krejcii (FRITSCH, 1895), figured after the original holotype of Acrolepis sphaerosideritarum FRITSCH, 1895, 3 – “Elonichthys” krejcii (FRITSCH, 1895), figured after the original holotype of Acrolepis krejcii FRITSCH, 1895, 4 – Sphaerolepis kounoviensis FRIČ, 1877, 5 – Sceletophorus biserialis FRITSCH, 1894, 6 – Pyritocephalus sculptus (FRIČ, 1875).