64999 Platyurosternarchus crypticus de Santana & Vari, 2009 Apteronotidae Ghost knifefishes Apteronotinae Gymnotiformes Teleostei South America: upper portions of the Rio Branco system of the Amazon basin in northeastern Roraima, Brazil and in the easternmost portion of the Rupununi District, Guyana. CU 93433, 1 (260) 3 N 59 W 1971 Platyurosternarchus crypticus