From there, this family evolved into a wide variety of genera, including Arctocyon (known as/similar to Claenodon in North America), Arctocyonides, Landenodon, and Mentoclaenodon, found in the late Paleocene layers of Cernay, France.
Remains of the species Cernaysia manueli (Vianey-Liaud M. 1986) were found in Upper Paleocene strata from Cernay, France.
The fossil record of this species is fragmentary; remains in Cernay, France, include a mandible, a complete radius, and fragments of a humerus.
With effect from 1 May 2012, a speed limit of 70 km/h was introduced on the sections of the road in the Haut-Rhin department, between the Col des Bagenelles and Uffholtz (near Cernay).