Hexaprotodon is a
genus of
Hippopotamidae that is sometimes applied to the
pygmy hippopotamus. Pygmy hippos may be classified as either
Choeropsis liberiensis or
Hexaprotodon liberiensis. The name
Hexaprotodon means "six front teeth" as some of the fossil forms have three pairs of
incisors. The genus Hexaprotodon also includes a number of rarely studied
extinct species from Asia, sometimes labeled "Asian Hippopotami."