Genidens barbus (Lacepède, 1803)

Soricetti, Mariano, Morawicki, Santiago, Guardiola Rivas, Fredy José, Guidi, Catalina, Quezada, Facundo, Almirón, Adriana Edith & Solimano, Patricio José, 2020, Ichthyofauna of the lower course of the Negro river drainage, Patagonia Argentina, Check List 16 (4), pp. 895-905 : 903

Genidens barbus (Lacepède, 1803)

Figure 3L

Material examined. ARGENTINA • 1 ♀, 320 mm; Site 6; 40°48ʹ10ʺS, 062°59ʹ36ʺW; 25 Feb. 2016; B. Rodriguez leg.; MPCN-Ict 13 . • 1 ♀, 343 mm; Site 6; 40°48ʹ10ʺS, 062°59ʹ36ʺW; 24 Nov. 2016; B. Rodriguez leg.; MPCN- Ict 82 . • 1 ♂, 351 mm; Site 6; 40°48ʹ10ʺS; 062°59ʹ36ʺW, 13 Dec. 2016; M. Soricetti leg.; MPCN-Ict 83 . • 1 ♀, 364 mm; Site 6; 40°48ʹ10ʺS; 062°59ʹ36ʺW, 30 Nov. 2017; M. Soricetti leg.; MPCN-Ict 84 . • 1 ♀, 372 mm; Site 6; 40°48ʹ10ʺS, 062°59ʹ36ʺW; 25 Feb. 2016; B. Rodriguez leg.; MPCN-Ict 85 .

Identification. Body robust and elongated. The anterior frontal fontanelle reaches close to the base of the postoccipital process like a narrow groove. Upper jaw projected and lips thick. Maxillary barbels reaches the end of the operculum; the shortest mental and postmental barbels are inserted parallel to the edge of the jaw. Adipose fin, short. Pectoral-fin spine similar in length to dorsal-fin spine, with toothed internal edge. Caudal fin forked, with upper lobe narrower and longer than lower lobe. Anal fin emarginated. Uniform gray–black color, with purple reflections.