Complex sentence: It was a member of the extinct order of Multituberculata, and lies within the suborder Cimolodonta and the family Microcosmodontidae.
Split into simpler sentences: It was a member of the extinct order of Multituberculata. For those of a technical inclination, it's within the Suborder of Cimolodonta, and the family Microcosmodontidae.