Kogaionidae

Kogaionidae is a family of fossil mammals within the extinct order Multituberculata. Representatives are known from the upper Cretaceous and the Paleocene of Europe. Having started as island endemics on Hateg Island, where they are in fact the dominant mammal group and diverged into rather unique ecological niches, they expanded across Europe in the Paleocene, where they briefly became a major component of its mammal fauna before their extinction. This family is part of the suborder Cimolodonta, generally accepted as closely related to Taeniolabidoidea.