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Ptilodontoidea
Ptilodontoidea is a group of extinct mammals from the Northern Hemisphere. They were generally small, somewhat rodent-like creatures of the extinct order Multituberculata. Some of these genera boast a great many species, though remains are generally sparse. Ptilodus is among the best known, and there's a tendency to depict it as an analog of a squirrel. Upper Cretaceous remains are known from North America and Europe. Later representatives (Paleocene - Eocene) hail from North America, Europe and Asia. These were some of the last multituberculates, and lie are within the suborder Cimolodonta. The superfamily is further divided into the following families: The affinities of Neoliotomus are less clear, though it seems to fit somewhere within the superfamily. References - Kielan-Jaworowska Z & Hurum JH (2001), "Phylogeny and Systematics of multituberculate mammals." Paleontology 44, p.389-429.
- Much of this information has been derived from http://home.arcor.de/ktdykes/ptilodon.htm MESOZOIC MAMMALS; Ptilodontoidea, an Internet directory.
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