A new insight into pycnodontiform fishes Author Poyato-Ariza F. J. Author Wenz S. text Geodiversitas 2002 24 1 139 248 journal article 10.5281/zenodo.5371649 1638-9395 5371649 Genus Coelodus Heckel, 1854 sensu stricto TYPE SPECIES. — Coelodus saturnus Heckel, 1854 . INCLUDED SPECIES. — Monotypic genus. REVISED DIAGNOSIS. — Derived pycnodontid fish with the following autapomorphies: prearticular teeth extremely elongated, up to five times longer perpendicularly to the longitudinal axis of the bone; diastema in caudal endoskeleton present, separating hypochordal elements 7 and 8. Unique combination of reverted primitive and derived characters: mouth gape subhorizontal; body ovoid in contour, maximum body height about 60% of standard length; caudal pedicle long, well differentiated; 11 teeth on main prearticular tooth row; grooves on vomerine and prearticular teeth present; about 31 vertebrae; 10 or 11 hypochordal elements in caudal endoskeleton, some of them hypertrophied; caudal fin double emarginated in distal contour; dorsal ridge scales separated from each other; no spines on dorsal ridge scales.