Triakis Muller and Henle 1838

Nostrils entirely distinct from mouth, their anterior margins without barbel; teeth compressed, with 2, 3 or 4 pointed cusps, the axial longest; a labial furrow on each jaw at corner of mouth; spiracles moderately large, easily seen.

Triakis attenuate n.sp.

Text-fig. 1, figs. A—Q; Text-fig. 2, figs. A-F.