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Earliest primate had tree-climber ankles

A creature known only from fossils of its teeth gets some more parts

RALEIGH, N.C. — Finally, the earliest known primate has more than a mouth. Several 65-million-year-old fossil ankle bones found among unsorted bits from excavations in Montana belong to a tree-dwelling species of Purgatorius, Stephen Chester of Yale University announced October 19 at the annual meeting of the Society of Vertebrate Paleontology.

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