The White Rhinoceros or Square-lipped rhinoceros ( Ceratotherium simum ) is one of the five species of rhinoceros that still exist and is one of the few megafauna species left . The White Rhinoceros or Square-lipped rhinoceros ( Ceratotherium simum ) is one of the five species of rhinoceros that still exist and is one of the few megafaunal species left .