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Hyracotherium (Primitive Horse), Willwood Formation, Wyoming

$45.00 

Description

0.54" (1.4 cm) Hyracotherium (Primitive Horse) tooth from the Willwood Formation of Park County, Wtyoming. Hyracotherium is now believed to be a primitive horse, the earliest-known member of the family Equidae. 55-52 million years old.