Alternative combinations: Cynarctus kelloggi, Cynodesmus kelloggi, Tephrocyon kelloggi, Tomarctus kelloggi
Synonyms: Cynodesmus casei Wilson 1939, Tomarctus casei Wilson 1939
Sister taxon: Paracynarctus sinclairi
- Paracynarctus kelloggi: Its type locality is Virgin Valley, which is in a Barstovian terrestrial horizon in the Virgin Valley Formation of Nevada
- Cynodesmus casei: Its type locality is Piney River, which is in a Miocene terrestrial horizon in the North Park Formation of Colorado.
Ecology: ground dwelling carnivore-omnivore
Average measurements (in mm): P4 12.7 x 7.4, M1 11.3 x 13.2, M2 8.04 x 11.49, p4 9.17 x 4.83, m1 15.0 x 7.0, m2 10.3 x 6.3