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出典:Wikipedia
出典:『Wikipedia』 (2009/11/24 02:57 UTC 版)
Oreodontoides is an extinct genus of oreodont of the family Merycoidodontidae, subfamily Merycoidodontinae, endemic to North America during the Late Oligocene-Early Miocene subepochs (24.8—20.6 mya), existing for approximately 4.2 million years.
oreodontoides