A new species of Astyanax (Characiformes, Characidae) from Paraná river basin in Argentina

AZPELICUETA, MARÍA DE LAS MERCEDES; MIRANDE, JUAN MARCOS; ALMIRÓN, ADRIANA E.; CASCIOTTA, JORGE R.

Revista del Museo de La Plata

Universidad de La Plata - Facultad de Ciencias Naturales y Museo

Lugar: La Plata, Argentina; Año: 2003 vol. 15 p. 1 - 12

0372-4565

Astyanax tupi n. sp. is described from the streams Cuñapirú Chico andCuñapirú, draining in Paraná river in the province of Misiones, Argentinean northeast. Acombination of characters differentiates the new species from other congeners: longpectoral fin always surpassing the pelvic-fin origin; origin of anal fin at level of a verticalthrough fifth or sixth branched dorsal-fin rays; one supraopercular and two humeral spotson flanks; 2-3 maxillary teeth; (10.2-11.9 % SL); maxillary length (100.0-136.6 % interorbitalwidth); 35-38 perforated scales in lateral line; 24-27 branched anal fin rays, and deepbody (36.9-42.6 % SL).