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

Authors

  • María de las Mercedes Azpelicueta
  • Juan Marcos Mirande
  • Adriana Edith Almirón
  • Jorge Rafael Casciotta

Keywords:

Characiformes, Characidae, Astyanax, Paraná river,

Abstract

Astyanax tupi n. sp. is described from the streams Cuñapirú Chico and Cuñapirú, draining in Paraná river in the province of Misiones, Argentinean northeast. A combination of characters differentiates the new species from other congeners: long pectoral fin always surpassing the pelvic-fin origin; origin of anal fin at level of a vertical through fifth or sixth branched dorsal-fin rays; one supraopercular and two humeral spots on flanks; 2-3 maxillary teeth; (10.2-11.9 % SL); maxillary length (100.0-136.6 % interorbital width); 35-38 perforated scales in lateral line; 24-27 branched anal fin rays, and deep body (36.9-42.6 % SL).

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