Hexaprotodon

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.'