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Hippopotamuses are the members of the family Hippopotamidae. They are the only extant artiodactyls which walk on four toes on each foot.
Species list
- Hippopotamus
- Hippopotamus - Hippopotamus amphibius
- Madagascan Dwarf Hippopotamus - Hippopotamus lemerlei
- Hexaprotodon
- Pygmy Hippopotamus - Hexaprotodon liberiensis
- Madagascan Pygmy Hippopotamus - Hexaprotodon madagascariensis
References
ITIS search as of 2004-08-11 (http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=624917)
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