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Pachyaena : ウィキペディア英語版
Pachyaena

''Pachyaena'' (literally, "Thick Hyena") was a genus of heavily built, relatively short-legged mesonychids that originated from Asia and spread to North America. The species ranged in size from a coyote to a bear.
Size varied depending on the species: For ''P. gracilis'', the body mass estimated based in femur length is 24.0 kg, for ''P. ossifraga'' is about 56.9 kg, and for the large ''P. gigantea'' is 81.7 kg.〔http://paleodb.org/cgi-bin/bridge.pl?a=basicTaxonInfo&taxon_no=49575〕〔http://paleodb.org/cgi-bin/bridge.pl?a=basicTaxonInfo&taxon_no=49572〕 However weight estimations of ''P. gigantea'' vary from 129 to 396 kg.〔J. Sargis, Eric (2009) ''Mammalian Evolutionary Morphology: A Tribute to Frederick S. Szalay'' p.130〕
==Species==
The genus' greatest diversity is seen in North America, with ''P. ossifraga'' known from Latest Paleocene strata of Wyoming, and ''P. gigantea'', ''P. intermedia'', and ''P. gracilis'' known from Early Eocene strata of Wyoming. ''P. nemegetica'' is known from Late Paleocene strata of Mongolia.

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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