Genidens genidens (Cuvier, 1829) (fig. 54) Pimelodus genidens Cuvier, 1829: 294. Type locality: not stated. Syntypes: MNHN 1213, MNHN B-0678. Genidens granulosus Castelnau, 1855: 34. pl. 16 (fig. 1). Type locality: Rio Araguay, Goiás, Brazil. Holotype: MNHN 1197. Genidens cuvieri Castelnau, 1855: 34. Type locality: Rio de La Plata. No types known. Genidens valenciennesi Bleeker, 1858: 68. Type locality: Rio de Janeiro, Brazil; Argentina. Syntypes: MNHN 1213, Rio de Janeiro, MNHN B-0678, rio de La Plata. Distribution: Southeast of South America. Countries: Brazil, Uruguay and Argentina. Habitat: Marine and brackish waters. Maximum size: 350 mm TL. Material examined: MZUSP 49319 (12 al) (1 c&s), Brazil, São Paulo, Cananéia; MZUSP 51721 (5 al) (1 c&s), Brazil, Bahia, rio Peruipe, port of Viçosa; MZUSP 51692 (4 es), Brazil, coast of São Paulo state; MZUSP 51694 (1 es), Brazil, São Paulo, Juréia; MZUSP 51693 (2 es), Brazil, São Paulo, between ilha de Bom Abrigo and Juréia, 16 miles from coast; MZUSP 51691 (1 es), Brazil, São Paulo, Bertioga, 6 miles from coast; MZUSP 24366 (5 al), Brazil, São Paulo, Cananéia.

Published as part of Alexandre P. Marceniuk & Naércio A. Menezes, 2007, Systematics of the family Ariidae (Ostariophysi, Siluriformes), with a redefinition of the genera., pp. 1-126 in Zootaxa 1416 on page 66