borophagine

Except in Borophagus and late Hemphillian Osteoborus, there is an entepicondylar foramen in borophagines, found in no living canid or hyaenid, but characteristic of felid humeri. In C. lupus and borophagines the lateral epicondyle bears two or more facets for the origin of the carpal and digital extensors and the supinator muscle.