Synonym: Cynarctus fortidens Hall and Dalquest 1962
Full reference: E. H. Barbour and H. J. Cook. 1914. Nebraska Geological Survey 4(15)
- Cynarctus crucidens: Its type locality is Whitford's Quarry No2, which is in a Clarendonian terrestrial horizon in the Ash Hollow Formation of Nebraska.
- Cynarctus fortidens: Its type locality is Noble Ranch, which is in a Miocene terrestrial horizon in Texas.
Ecology: ground dwelling carnivore-omnivore
Average measurements (in mm): P4 8.88 x 6.04, M1 9.25 x 8.85, M2 9.79 x 8.21, p4 7.63 x 3.73, m1 11.3 x 5.5, m2 10.2 x 5.7