51223 Bivibranchia fowleri (Steindachner, 1908) Hemiodontidae Halftooths Characiformes Teleostei South America: Negro, Tocantins, Xingu, Tapajós, Madeira, Essequibo, and Orinoco River basins. AMNH 13342 Bivibranchia protractila AMNH 214972 Bivibranchia protractila AMNH 215016 Bivibranchia protractila AMNH 27391 1934 Bivibranchia protractila AMNH 17613 1937 Bivibranchia protractila AMNH 93011 1989 Hemiodopsis fowleri AMNH 230986 1999 Bivibranchia protractila