A new species of Astyanax (Characiformes: Characidae) from the endorheic Río Salí basin, Tucumán, northwestern Argentina

MIRANDE, JUAN MARCOS; AGUILERA, GASTÓN; AZPELICUETA, MARÍA DE LAS MERCEDES

ZOOTAXA

Magnolia Press

Lugar: Auckland, Nueva Zelanda; Año: 2007 vol. 1646 p. 31 - 39

1175-5334

Astyanax puka, new species from the endorheic Río Salí basin, is diagnosed by the  following combination of characters: shallow body (33.5-39.8 % SL), 36-38 perforated  scales in lateral line, 6/5 transverse scales, 9-10 gradually decreasing dentary teeth, distally  expanded premaxillary teeth, one distally expanded maxillary tooth with 7-9 cusps, short upper-jaw length (34.5-37.8 % HL), short maxilla (20.7-23.3 % HL) expanded abruptly  under maxillary tooth position, short postorbital distance (36.6-46.9 % HL), short distance  between pelvic and anal-fin origins (17.1-20.6 % SL), 22-27 branched anal-fin rays, long  caudal peduncle (13.3-16.5 % SL), bony hooks restricted to pelvic-fin rays 2 to 6 and anterior 6-13 branched anal-fin rays on mature males, and the presence of broad denticles on  anterior, lateral, and posterior edges of first ceratobranchial gill rakers.