Tephrocyon
Introduction '''''Tephrocyon''''' is an extinct genus of  the Borophaginae subfamily of canids native to North America. They lived during the Barstovian stage of the Middle Miocene 16.3—13.6 million years ago, existing for roughly . It is a rarely found genus, with fossil deposits only occurring in western Nebraska, Wyoming, eastern Oregon, New Mexico, and north Florida. It was an intermediate-sized canid, and more predatory than earlier borophagines.
References
Further reading *''The Biology and Conservation of Wild Canids'' by David W. Macdonald and Claudio Sillero-Zubiri; page 42