Mammalia - Rodentia - Cricetidae

Alternative spelling: Arborimus

Synonym: Paraphenacomys Repenning and Grady 1988

Parent taxon: Phenacomys according to Taylor 1915

Sister taxa: Phenacomys brachyodus, Phenacomys deeringensis, Phenacomys gryci, Phenacomys intermedius

Subtaxa: Arborimus albipes Arborimus longicaudus Arborimus pomo

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Distribution: found only at Little Box Elder Cave (Quaternary of Wyoming)

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