Ctenacodon

Ctenacodon is a genus of extinct mammal that lived in what is now North America during the Upper Jurassic period. It's a member of the family Allodontidae within the order Multituberculata. Ctenacodon,also known as Allodon (Marsh 1881), was named by Othniel Charles Marsh in 1879. At least four species are currently recognized.