Complex sentence: This animal was a member of the extinct order Multituberculata, lying within the suborder Cimolodonta, and is a member of the family Neoplagiaulacidae.
Split into simpler sentences: This animal was a member of the extinct order of Multituberculata. For those of a technical inclination, it's within the suborder of Cimolodonta, and a member of the family Neoplagiaulacidae.