CETOPSIDAE BLEEKER, 1858

De Pinna, Mário C. C., Ferraris, Carl J. & Vari, Richard P., 2007, A phylogenetic study of the neotropical catfish family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes), with a new classification, Zoological Journal of the Linnean Society 150 (4), pp. 755-813 : 801

FAMILY CETOPSIDAE BLEEKER, 1858

Diagnosis (Br: 4, jk: 82, bs: 76):

Maxilla with a single articular head (2);

Anterior and medial palatine cartilages continuous (15, reversed to state 0 in C. coecutiens );

Opercle and interopercle overlapping, forming a lap suture (22);

Point of attachment of interoperculo-mandibular ligament on the dorsal margin of the interopercle (23);

Interopercle with reduction of its anteroposterior axis, so that it is as deep as, or slightly deeper than, long (24);

Metapterygoid rectangular (25).

Included subfamilies: Helogeninae , Cetopsinae .