Dissacus (Dissacus Cope, 1881)
Temporal range: during the Paleocene through Eocene epochs 66—50.3 mya, existing for approximately .
Size: 1.3 m in length, 60 cm in height, 10-20 kg of weight.
A typical representative: Dissacus europaeus
Dissacus is an extinct carnivorous jackal to coyote-sized mammal of the family Mesonychidae.
Dissacus had a Holarctic distribution but Dissacus europaeus was the only mesonychid in present-day Europe. The fossil record of this species is fragmentary; remains in Cernay, France, include a mandible, a complete radius, and fragments of a humerus. A morphological study of these bones suggests this animal was digitigrade and more cursorial than is usually assumed for the genus.