Orthacanthus gracilis (Giebel, 1848)

Fig. 1A

Chilodus gracilis Giebel, 1848: 352-353.

Chilodus gracilis: Giebel 1849: 70, pl. XXIX, fig. 2.

Pleuracanthus sp.: Gocht 1955: pl. VIII, fig. 5.

Orthacanthus -Typ UG: Schneider 1985: 91-92, fig. 2.

Orthacanthus carbonarius (Germar, 1844): Schneider 1988: pl. 1, fig. 4.

Orthacanthus gracilis (Giebel, 1848): Boy and Martens 1991: figs 1, 8.

Orthacanthus gracilis: Hampe 1994: 56-63, figs 1-5.

Orthacanthus gracilis: Hampe 2003: 209-210.

Holotype.

Tooth; Geiseltalmuseum Halle, GTM 1095, previously illustrated by Giebel (1849: pl. XXIX, fig. 2) and Hampe (1994: Fig. 1a-c).

Type locality.

Slate of the Wettin-Schichten (Carboniferous) from Wettin, north of Halle, Saale area, Saxony-Anhalt, Germany.

Remarks.

The basionym Chilodus gracilis Giebel, 1848 is designated herein as the type species of Chilodus Giebel, 1848. Whitley (1940: 243) proposed Giebelodus as a replacement name for Chilodus Giebel, 1848 (preoccupied by Chilodus Müller & Troschel, 1844), and C. gracilis Giebel, 1848 is thus the type species of Giebelodus . Following Boy and Martens (1991) and Hampe (1994, 2003), Giebelodus gracilis (Giebel, 1848), which is known only from teeth, is referred to the genus Orthacanthus Agassiz, 1843.