Peces Criollos - Freshwater Fishes of Argentina Peces Criollos - Freshwater Fishes of Argentina
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Astyanax latens sp.nov.

 


Astyanax latens, from type locality in Argentina
photo: Marcos Mirande

new species:
Astyanax latens    Mirande, Aguilera & Azpelicueta, 2004

type locality:
Argentina, Province of Salta, río Bermojo basin, arroyo El Oculto (23°07'S 64°30'W); holotype FML 3400 (male, 44.3 mm)

distribution in Argentina: 
only known from type locality; paratypes: MHNG 2640.36 (5), AI 110 (4), FML 3401 (5), FML 3402 (10), AI 112 (2 c&s)

published in:
Mirande, J.M., G. Aguilera & M. Azpelicueta (2004):
A new species of Astyanax (Characiformes, Characidae) from the upper río Bermejo basin, Salta, Argentina.
Revue Suisse de Zoologie 111 (1): 213-223

abstract (from publication):
Astyanax latens sp.n., from the Bermejo river basin, is described in this paper. Astyanax latens is diagnosed by a combination of characters: somewhat rhomboidal body; presence of 24-29 branched anal fin rays; 1-4 maxillary teet; long pectoral fins (23.2-26.6 % of SL) always reaching one third of pelvic fin rays; long pelvic fins (17.6-22.0 & of SL) always surpassing anal fin origin; anal fin base long (32.3-36.7 & of SL); 26-27 gillrakers on first branchial arch; lateral band extremely narrow; one large vertically elongated humeral spot and a second one very faint; relatively shallow caudal peduncle (10.0-11.4 % of SL); fifth tooth of inner premaxillary series very small and scarcely posterior to main series; origin of anal fin below dorsal fin.

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