What is "tritylodontidae"

Tritylodontids ("three knob teeth", named after the shape of animal's teeth) were small to medium-sized, highly specialized and extremely mammal-like cynodonts, bearing several mammalian hallmarks like erect limbs, endothermy and lactation. They were the last known family of the non-mammalian synapsids. One of the last cynodont lines to appear, the Tritylodontidae descended from a Cynognathus-like cynodont. The Tritylodontids were herbivorous, chewing through vegetation, such as stems, leaves, and roots, though recent studies indicate some may have had more omnivorous diets. Tritylodontid fossils are found in the Americas, South Africa, and Eurasia - they appear to have had an almost global distribution, including Antarctica.