Mammalia - Multituberculata

Parent taxon: Plagiaulacida according to R. L. Cifelli et al. 2014

Sister taxa: Albionbaataridae, Argillomys, Gondwanatherioidea, Iberica, Janumys, Paulchoffatioidea, Pinheirodontidae, Plagiaulacidae, Polymastodontidae

Subtaxa: Passumys

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Ecology: arboreal herbivore

Distribution: found only at OMNH V1243, Hell Canyon (Cretaceous of South Dakota)

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