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子,动物和其他现存的类哺乳动物的晚白时期的亲属

J D Archibald1, A O Averianov, E G Ekdale

  • 1Department of Biology, San Diego State University, San Diego, California 92182-4614, USA. darchibald@sunstroke.sdsu.edu

Nature
|November 2, 2001
PubMed
概括

在乌兹别克斯坦发现的化石显示,一些白纪晚期的eutherians,如Kulbeckia,属于胎盘哺乳动物群 (Placentalia). 这一发现推迟了胎盘哺乳动物的起源比以前认为的更早.

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