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Repenomamus
''Repenomamus'' is a gobiconodontid mammal genus containing two species, ''Repenomamus robustus'' and ''Repenomamus giganticus''. Both species are known from fossils found in China that date to the early Cretaceous period, about 125-123.2 million years ago. ''R. robustus'' is one of several Mesozoic mammals for which there is good evidence that it fed on small vertebrates, including young dinosaurs, though it is not possible to determine if it actively hunted live dinosaurs or scavenged dead ones. ''R. giganticus'' is among the largest mammals known from the Mesozoic era.
== Classification and discovery ==
The fossils were recovered from the lagerstätte of the Yixian Formation in the Liaoning province of China, which is renowned for its extraordinarily well-preserved fossils of feathered dinosaurs. They have been specifically dated to 125-123.2 million years ago, during the Early Cretaceous period.
''Repenomamus'' is a genus of triconodonts, a group of early mammals with no modern relatives. ''R. robustus'' was described by Li, Wang, Wang and Li in 2000, and ''R. giganticus'' was described by Hu, Meng, Wang and Li in 2005. The two known species are the sole members of the family Repenomamidae, which was also described in the same paper in 2000. It is sometimes alternatively listed as a member of the family Gobiconodontidae; although this assignment is controversial, a close relationship to this family is well-founded.
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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