not a species from Argentina:
Serrapinnus piaba (Luetken, 1874)
remarks:
This fact was published on the below mentioned poster (J. Mantinian, com. pers.). Unfortunately no information on single species is provided in the summary book of this event.
published in:
Mantinian, J.E., A.M. Miquelarena & H.L. López (2008):
La subfamilia Cheirodontinae (Characiformes: Characidae): Distribución en la Argentina.
Poster presented in: III. Congreso Nacional de Conservación de la Biodiversidad. Dpto. Biodiversidad y Biología Experimental, FCEyN, UBA. Buenos Aires, August 11th-14th, 2008.