Temporal range: Early Paleocene–Early Eocene
Dissacus is a genus of extinct carnivorous jackal to coyote-sized mammals within the family Mesonychidae whose fossils are found in Paleocene to Early Eocene aged strata in France, Asia and southwest North America, 66—50.3 mya, existing for approximately .
The bear-sized Ankalagon is closely related to Dissacus, being regarded as a sister or daughter genus.
Dissacus had a Holarctic distribution but Dissacus europaeus is the only mesonychid currently known from European strata. 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. 
- Genus Dissacus
- PaleoBiology Database: Dissacus, basic info
- Agusti, Jordi; Anton, Mauricio (2002). Mammoths, Sabertooths, and Hominids: 65 Million Years of Mammalian Evolution in Europe. Columbia University Press. pp. 13, 14. ISBN 0-231-11640-3.
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