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中国地质科学院地质研究所的科学家和美国匹兹堡卡内基自然历史博物馆的科学家最近在中国辽宁省凌源市中生代的地层中发现了一种有胎盘类哺乳动物的化石,这个化石的地质年代非常久远。科学家们认为,这个最新发现的有胎盘类哺乳动物的化石是世界上已知的真兽类(有胎盘类)哺乳动物中最早也是最原始的。这个新的哺乳动物被命名为攀援始祖兽(Eomaia scansoria);Eo-(希腊文:原始古老);-maia
Scientists from the Institute of Geology of the Chinese Academy of Geological Sciences and scientists from the Carnegie Museum of Natural History in Pittsburgh, USA, recently discovered a fossil of placental mammals in the Mesozoic strata in Lingyuan City, Liaoning Province, China. The geological age of this fossil is very long . Scientists believe that this newly discovered fossil of placental mammals is the earliest and the most primitive in the world of mammals known as true mammals (with placenta). This new mammal is named Eomaia scansoria; Eo- (Greek: primitive ancient); - maia