Teilhardina magnoliana

Teilhardina magnoliana is the earliest known North American primate; its fossil was first discovered in the US state of Mississippi. It was a tree-dwelling fur-covered tiny creature with a long slender tail; the tail was significantly longer than the body.

The discoverer, K. Christopher Beard of the Carnegie Museum of Natural History (Pittsburgh, Pennsylvania), posited that Teilhardina magnoliana's ancestors crossed the land bridge from Siberia to the Americas, possibly more than 55.8 million years ago, although the age of the discovered fossil is a matter of disagreement. The animal weighed approximately one ounce.