Borophaginae
| Borophagines Temporal range:  Oligocene-Earliest Pleistocene | |
|---|---|
| Aelurodon stirtoni | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Mammalia | 
| Order: | Carnivora | 
| Family: | Canidae | 
| Subfamily: | †Borophaginae Simpson (1945) | 
| Genera | |
| See text | |
The extinct Borophaginae form one of three subfamilies found within the canid family. The other two canid subfamilies are the extinct Hesperocyoninae and extant Caninae. Borophaginae, called "bone-crushing dogs", were endemic to North America during the Oligocene to Pliocene and lived roughly 34—2.5 million years ago, existing for about 33.5 million years.