Theriodictis is an extinct genus of small hypercarnivorous fox-like canid endemic to South America during the Pleistocene, living from 1.2 Ma-11,000 years ago and existing for approximately 1.19 million years. Prey is thought to have included ungulate camelids (e.g. llama), cervids (e.g. Epieurycerus and Antifer), equids (e.g. Equus and Hippidion), Peccaries (e.g. Catagonus), giant rodents (e.g. Neochoerus), mesotherids (e.g. the burrowing Mesotherium), and giant cingulates (e.g. Eutatus, Propraopus and Pampatherium).