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出典:Wikipedia
出典:『Wikipedia』 (2011/06/16 02:18 UTC 版)
Deltatheridium (meaning triangle beast or delta beast) is an extinct species of metatherian. It lived in what is now Mongolia during the Upper Cretaceous. It was a basal metatherian, which places it near start of the linage that led to the marsupials, such the kangaroo, koala, and opossum.
Deltatheridium