Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Mammalia [classis]
Artiodactyla [ordo]
Hippopotamidae [familia]
Hippopotamus [genus]
Genus Hippopotamus contains the following taxa:
Hippopotamus amphibius Linnaeus, 1758 [species]
Hippopotamus incognitus (Faure, 1984) [species]