Peces Criollos - Freshwater Fishes of Argentina Peces Criollos - Freshwater Fishes of Argentina
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Hyphessobrycon auca sp.nov.

Hyphessobrycon auca, colour in live

Hyphessobrycon auca, Holotype
photos: Jorge R. Casciotta

new species:
Hyphessobrycon auca Almirón, Casciotta, Bechara & Ruiz Diaz, 2004

type locality:
Argentina, Corrientes, Esteros del Iberá, pond in San Juán Poriahú farm (27°41’53”S 57°12’17”W); Holotype MACN-Ict 8647, 51,2 mm SL, female

published in:
Almirón, A.E., J.R. Casciotta, J.A. Bechara. & F.J. Ruiz Diaz (2004):
A new species of Hyphessobrycon (Characiformes, Characidae) from the Esteros del Iberá wetlands, Argentina.
Revue Suisse de Zoologie 111 (3): 673-682

abstract (from publication):
Hyphessobrycon auca sp.n. is described from the Esteros del Iberá wetlands. Hyphessobrycon auca differs from the remaining species of the genus by the presence of one maxillary tooth with 5 cusps; dentary low with teeth decreasing in size anteroposteriorly; males with hooks in all fins; mature females with hooks on pelvic-fin rays; one humeral spot vertically elongated, bounded by a light area; a second lateral spot may be faint or well developed; a wide lateral band ending in a conspicuous caudal spot.

distribution (from publication):
Hyphessobrycon auca sp.n. is known from two isolated ponds placed inside of the farm San Juán Poriahú in the northwest of Esteros del Iberá wetlands.

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