Prochilodus argenteus; Print; Prochilodus is a genus of freshwater fish from the family Prochilodontidae. This family include two other genera; Ichthyoelephas and Semaprochilodus; which have been included in Prochilodus instead. The greatest species richness of Prochilodus is in river basins in eastern; southeastern and southern Brazil; but there are also species in the river basins of the Amazon; Guianas; Colombia; Venezuela; Paraguay and northeastern Argentina. The largest species in the genus reach about 80 centimetres (31 in) in length; but most species barely reach half that size.; 1700-1880