Bunotheria

Bunotheria, an order of mammals made by Professor Cope to include Professor Marsh's order Tillodontia and his own family Taeniodontia, i.e. the genera Tillotherium, from the Lower Eocene, Platychaerops, from the London Clay, and Esthonyae and Calamodon, from the Wasatch Middle Eocene of Wyoming. Their cheek-teeth have massive squared crowns, and their general characters harmonise with the view that both ungulates and rodents have been derived from a primitive carnivorous stock. Cope regards these forms as near to the ancestral type of the Rodentia, and allied to that of the Edentata.