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A new analysis of this 62-million-year-old partial skeleton of Torrejonia, a small mammal from an extinct group of primates called plesiadapiforms, had skeletal features adapted for living in trees.

From the press release:
Fossil Skeleton Confirms Earliest Primates were Tree Dwellers

Note: Representative image at left is often cropped for display purposes. Downloaded high-resolution images are not cropped.