Before Juramaia's discovery, the oldest known eutherian was Eomaia that lived 125 million years ago.
在发现Juramaia前，已知的最早的真兽类动物是生活在1.25亿年前的Eomaia。
Sucking lice are exclusively hematophagous ectoparasites of eutherian (placental) mammals, and are worldwide distribution.
吸虱是寄生于真兽类哺乳动物体表的专性吸血寄生虫，广布于世界各地。
Sucking lice are exclusively hematophagous ectoparasites of eutherian (placental) mammals, and are worldwide distribution.
吸虱是寄生于真兽类哺乳动物体表的专性吸血寄生虫，广布于世界各地。
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