Dissacus

Dissacus is a genus of extinct carnivorous jackal to coyote-sized mammals within the family Mesonychidae, an early group of hoofed mammals that evolved into hunters and omnivores. Their fossils in Paleocene to Early Eocene aged strata in France, Asia and southwest North America, from 66 to 50.3 mya, existed for approximately .

thumb|left|D. zanabazari Orientation patch analysis of the molar teeth of the North American D. praenuntius suggests it was an omnivore that ate a lot of meat, not an exclusive meat-eater like a cat or weasel. It shared its environment with more omnivorous mammals of a similar body size. Though they are not ancestral to Carnivora, Dissacus species may have had similar roles in Paleocene-early Eocene environments as the foxes and other small canids that evolved later: generalised hunters who also ate fruit or other foods, and caught small animals that lived on the ground.