Stemmatodus Heckel, 1854

Poyato-Ariza F. J. & Wenz S., 2002, A new insight into pycnodontiform fishes, Geodiversitas 24 (1), pp. 139-248 : 220

Genus Stemmatodus Heckel, 1854

TYPE SPECIES. — Pycnodus rhombus Agassiz, 1839 .

INCLUDED SPECIES. — Monotypic genus.

REVISED DIAGNOSIS. — Pycnodontid fishes with two autapomorphic characters: maxilla unornamented, with straight oral border; and no posterior modified cloacal scales, posterior part of anal notch supported by a rib. Unique combination of derived characters: body shape intermediate, maximum body height up to 70% of standard length; ventral apex absent; preoperculum of similar size to expanded ornamented region of the dermohyomandibular; vomerine teeth (sub)- circular in contour; eight or nine teeth in principal vomerine tooth row; 10 or more teeth in principal prearticular tooth row; six or less anterior autogenous neural spines; dorsal fin at 60%-69% of standard length (R); free dorsal axonost present; all body scales incompletely ossified, reduced to bar scales; and 10 to 14 ventral keel scales.