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Ashoroa
''Ashoroa'' (named after its type locality Ashoro, Hokkaido) is an extinct genus of desmostylian, aquatic, herbivorous mammal. Fossils of ''Ashoroa'' have been found on Hokkaido, Japan (, paleocoordinates ) and were dated to the late Oligocene.〔. Retrieved March 2013.〕
''Ashoroa'' is the smallest and one of the oldest desmostylians with an estimated body length of . It is known from a rib, a humerus, a femur, and three vretebrae of the single species and holotype, ''Ashoroa laticosta''.
''Ashoroa'' had pachyosteosclerotic (large and dense) bones. The ribs are broader than in other desmostylians, similar to sirenian ribs, and very dense, like those of ''Behemotops'' and ''Paleoparadoxia''; and extant, semi-aquatic mammals such as Eurasian beaver and hippopotamus, but not as dense as in sirenians. The recovered long bones lack inner cavities, like in ''Paleoparadoxia'' and ''Desmostylus'', and the trabecular pattern is different from that in ''Behemotops''.
interpreted ''Ashoroa'', together with ''Behemotops'' and ''Paleoparadoxia''. as a "shallow water swimmer, either hovering slowly at a preferred depth, or walking on the bottom".〔
==Notes==
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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