sentences:  However, some evidence has shown this family, along with Pimelodidae, Heptapteridae, and "Conorhynchos", may form a monophyletic assemblage, which contradicts the hypothesis that the former family Pimelodidae that included these families is a polyphyletic group.The Pseudopimelodidae are restricted to fresh water in South America, from the Atrato River in Colombia to Argentina in the Río de la Plata.These catfishes have wide mouths, small eyes, and short barbels.