|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Rodentia - Sciuridae
It was recombined as Arctomyoides arctomyoides by Bryant (1945), Black (1963) and Tabrum and Nichols (2001).
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|M. D. Bryant 1945||Mandibular ramus slightly larger than that of Cynomys l. ludovicianus, larger than that of any North American species of Sciurus and smaller than the rami of Marmota and Palaearclomps. Messeteric fossa broadly rounded anteriorly; terminates below posterior margin of p4.|