first record from Argentina:
Pterobunocephalus depressus (Haseman, 1911)

published in:
Ciotek, L., P. Giorgis, J. Casciotta & A. Almirón (2008):
Presence of Pterobunocephalus depressus (Haseman, 1911), (Siluriformes, Aspredinidae) in freshwaters of Argentina.
Ichthyological Contributions of PecesCriollos 9: 1-4

abstract (from publication):
Pterobunocephalus depressus is registered for the first time from the lower río Paraná in the Pre-Delta National Park, Argentina. The specimens were collected in the arroyo La Azotea (32°07’17.8”S – 60°38’04.3” W).