Mammalia - Rodentia - Allomyidae

Full reference: J. R. Macdonald. 1970. Review of the Miocene Wounded Knee faunas of southwestern South Dakota. Bulletin of the Los Angeles County Museum of Natural History, Science 8:165-82

Parent taxon: Allomyidae according to J. R. Macdonald 1970

Sister taxa: Allomys, Alwoodia, Campestrallomys, Haplomys, Oropyctis, Parallomys, Pelycomys, Plesispermophilus, Rudiomys, Spurimus

Subtaxa: Downsimus chadwicki

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Type: Downsimus chadwicki

Ecology: ground dwelling herbivore