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Redescription of Astyanax erythropterus (Holmberg, 1891) (Teleostei: Characiformes: Characidae) from La Plata basin in Argentina

2010; Sociedade Brasileira de Ictiologia; Volume: 8; Issue: 4 Linguagem: Inglês

10.1590/s1679-62252010005000009

1982-0224

Paula Soneira, Jorge Rafael Casciotta, Adriana Almirón, Liliana Ciotek, Pablo Giorgis,

Fish Ecology and Management Studies

Astyanax erythropterus (Holmberg, 1891) originally described on the basis of one juvenile, is redescribed herein based on juveniles and adults from the type-localiy. The species differs from its congeners by the combination of 11-13 transverse rows scales above lateral line and 8-10 rows below lateral line; 49-54 perforated scales in the lateral series; iii-v,38-42 anal-fin rays, and dorsal, anal and caudal fins vermilion red in juveniles. The vermilion red coloration of unpaired fins in juveniles of Astyanax is only known in A. correntinus.