64937 Brachyhypopomus bullocki Sullivan & Hopkins, 2009 Hypopomidae Bluntnose knifefishes Gymnotiformes Teleostei South America: Orinoco basin in Venezuela and Colombia; rio Branco drainage in Guyana and Brazil, as well as in the upper rio Negro near the mouth of the rio Branco, but is not known from elsewhere in the Amazon system, or in the Guianas. ANSP 187477 4 N 73 W 1969 Brachyhypopomus bullocki