Taeniolabis ("Ribbon Lips") is a genus of extinct multituberculate mammal from the Paleocene of North America. It is the largest known member of the extinct order Multituberculata, as well as the largest non-therian mammal: T. taoensis possibly exceeds 100 kg. It is within the suborder of Cimolodonta and is a member of the superfamily Taeniolabidoidea. The genus was named by Edward Drinker Cope in 1882. Species have also been placed with the genera Catopsalis and Polymastodon Cope, 1882.