Tassiliodus, Derycke & Goujet, 2011

Derycke, Claire & Goujet, Daniel, 2011, Multicuspidate shark teeth associated with chondrichthyan and acanthodian scales from the Emsian (Devonian) of southern Algeria, Geodiversitas 33 (2), pp. 209-226 : 213

Genus Tassiliodus n. gen.

TYPE SPECIES. — Tassiliodus lessardi n.sp. (MNHN.F.ALD - 15, Fig. 4A ).

ETYMOLOGY. — From Tassili, origin of the material, and -odus, tooth.

DIAGNOSIS. — Crown with three diverging main cusps, the middle one being shorter than the two diverging lateral ones, intermediate cusplets in a more labial position than the main ones, rugose base oriented lingually. Scales with a flat base, a high neck and ridges on the crown, histological structure with an extensive network of wide vascular canals through the neck and base, box-in-box pattern, pallial dentine and mesodentine.

Figures

FIG. 4.— Chondrichthyan teeth of Tassiliodus lessardi n. gen.,n.sp.from the Emsian (Devonian) of southern Algeria:A, MNHN.F.ALD-15; A1, labial view;A2, labio-lateral view; A3, enlargement of the base;A4, basal view;A5, enlargement of the basal view;B, MNHN.F.ALD-16, lingual views. Scale bars: A1, A2, A4, B2, B3, 2 mm; A3, B1, B4, 1 mm; A5, 200 μm.