first record from Argentina:
Brachyhypopomus gauderio Giora & Malabarba, 2009

published in:
Almirón, A., J. Casciotta, L. Ciotek, P. Giorgis, P. Soneira & F. Ruíz Díaz (2010):
Pisces, Gymnotiformes, Hypopomidae, Brachyhypopomus Mago-Leccia, 1994: First country record of three species of the genus, Argentina.
Checklist 6 (4): 572-575

type locality:
channel connecting Lagoa do Casamento and Lagoa dos Gateados, Palmares do Sul, Rio Grande do Sul, Brazil

habitat and distribution in Argentina (from publication):
Brachyhypopomus gauderio was collected from many localities in the Iberá Wetlands (Lagunas Iberá, Galarza, Luna, Paraná and San Juan, and Río Corriente), Corrientes province, and in Arroyo Los Dorados in Pre-Delta National Park, Entre Ríos province.

abstract (from publication):
Brachyhypopomus bombilla, B. draco and B. gauderio are recorded for the first time in freshwaters of Argentina. These species were collected in the Río Paraná basin at the Iberá Wetlands and Pre-Delta National Park. Brachyhypopomus bombilla, B. draco and B. gauderio can be sympatric and syntopic in Pre-Delta National Park, whereas B. bombilla and B. gauderio occupy the same environments in the Iberá Wetlands. Some records of B. brevirostris for Argentina are misidentifications of B. gauderio, whereas others could correspond to one of these three species.