Rhamphichthyidae, Regan, 1911

Júnior, Horácio Ferreira Júlio, Tós, Claudenice Dei, Agostinho, Ângelo Antonio & Pavanelli, Carla Simone, 2009, A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin, Neotropical Ichthyology 7 (4), pp. 709-718 : 714

Rhamphichthyidae

Rhamphichthyids are a small family of knifefishes with a few more than a dozen species (Ferraris Jr., 2003). The colonizer Rhamphichthys hahni (formerly misidentified as R. rostratus ), currently found in the upper rio Paraná, was consensually absent in this basin before the Itaipu’s closure, as stated by several authors, such as Graça & Pavanelli (2007) and Langeani et al. (2007). Gymnorhamphichthys cf. hypostomus clearly appeared in the upper rio Paraná only recently. Its occurrence is rare and its invasion in the upper Paraná ecoregion can be attributed to the elimination of Sete Quedas Falls by the Itaipu Reservoir.