Mammalia - Carnivora - Canidae

Alternative combinations: Aelurodon pugnator, Osteoborus pugnator, Porthocyon pugnator

Synonym: Osteoborus galushai Webb 1969

Belongs to Borophagus according to X. Wang et al. 1999

Sister taxa: Borophagus diversidens, Borophagus dudleyi, Borophagus hilli, Borophagus littoralis, Borophagus orc, Borophagus parvus, Borophagus secundus

Type specimens:

• Borophagus pugnator: Its type locality is Wray, which is in a Hemphillian terrestrial horizon in Colorado
• Osteoborus galushai: Its type locality is Mixson's Bone Bed, which is in a Hemphillian terrestrial horizon in the Alachua Formation of Florida.

Ecology: ground dwelling carnivore

Average measurements (in mm): P4 24.6 x 11.2, M1 16.9 x 18.7, M2 9.61 x 13.78, p4 16.0 x 9.8, m1 26.9 x 10.7, m2 12.1 x 8.1