The mutituberculates are a group of prehistoric mammals that were common in the Mesozoic era. They are distinguishable from other mammals at the time with their rodent-like skulls and enlarged ridged millstone-like premolars. This unique tooth structure is distinct largely to multituberculates. Unlike most other mammals known largely from the Mesozoic, the multituberculates survived into the Paleocene and Eocene. They finally died out around 35 million years ago.