1.32" Fossil Early Ungulate (Oxacron) Jaw - France

Oxacron was a genus of small herbivorous ungulates. They were in the artiodactyl order, related to modern camels, deer, and giraffes. In spite of this, Oxacron's small size and limb morphology suggests that it moved more like extant rabbits, hopping along at high speeds. However, based on trace fossils attributed to the Cainotheriid family to which Oxacron belongs, most scientists now believe that their locomotion was similar to modern ruminants. They were small generalist herbivores, likely feeding on anything leafy in their habitats.

The Artiodactyls are a group of mammals often called "even-toed" ungulates. They are called such because modern members of the group support their bodies on enhanced third and fourth digits (fingers), ending in hooves. Their first, second, and fifth digits are often reduced or nonexistent in modern species, however many extinct and fossil species retain five-toed feet. All artiodactyls, with the exception of whales and their ancestors, are herbivorous.