Original: The genus contains two species, the Indian Rhinoceros (Rhinoceros unicornis) and the Javan Rhinoceros (Rhinoceros sondaicus).
Simplified: The genus Rhinoceros of the family Rhinocerotidae includes the one-horned rhinoceroses, of which there are two extant species: the Indian rhinoceros (R. unicornis) and the Javan rhinoceros (R. sondaicus).