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Oldest full fossil yet for speedy mammal

Rendition of ancient mammal

A 160 million-year-old fossil suggests that flexible ankles and versatile ridged teeth were key to the success of a group of ancient mammals called multituberculates.

“Despite the success of the multituberculates, the earliest fossils are very fragmentary. Now, we finally have a complete skeletal fossil that allows us to paint a coherent picture of the evolutionary origin of these prolific and important ancient mammals,” says Zhe-Xi Luo, professor of organismal biology and anatomy at the University of Chicago.

Full story at Futurity.

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Photo credit: April Isch/U. Chicago

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