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Leptauchenia
''Leptauchenia'' is an extinct goat-like genus of terrestrial herbivore belonging to the oreodont family Merycoidodontidae, and the type genus of the tribe Leptaucheniini. The genus was endemic to North America during the Late Oligocene (33.9—16.3 mya) and lived for approximately .〔(PaleoBiology Database: ''Leptauchenia'', basic info )〕
==Morphology==
Because the eyes and nostrils were placed high on the head, it was long assumed that ''Leptauchenia'' was an aquatic, or semi-aquatic animal. However, because their fossils have never been found in floodplain deposits or river channels, and their abundance in fossil sand dunes, Donald Prothero suggests that they were desert-dwelling animals.〔Prothero, D. R., and F. Sanchez. 2005. Review of the leptauchenine oreodonts (Mammalia: Artiodacttyla). ''New Mexico Museum of Natural History and Science Bulletin.''〕 According to Prothero's interpretation, the high-placed eyes and nostrils served to filter out sand while burrowing, or while digging themselves free of sand dunes.
A single specimen was examined by M. Mendoza for body mass and estimated to have a weight of . 〔M. Mendoza, C. M. Janis, and P. Palmqvist. 2006. Estimating the body mass of extinct ungulates: a study on the use of multiple regression. Journal of Zoology〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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