first record from Argentina:
Otocinclus vestitus Cope, 1872

This species was listed with a locality from Argentina as comparative material in the description of Epactionotus aky.

distribution in Argentina:
Corrientes province, Río Paraná, Puerto Abra (AI 118)

published in:
Azpelicueta, M., J.R. Casciotta, A.E Almirón & S. Koerber (2004):
A new species of Otothyrini (Siluriformes: Loricariidae: Hypoptopomatinae) from the Río Uruguay basin, Argentina
Verhandlungen der Gesellschaft für Ichthyologie 4 : 81-90