Mammalia - Rodentia - Sciuridae
Parent taxon: Sciuridae according to J. M. Mercer and V. L. Roth 2003
Sister taxa: Albanensia, Arctomyoides, Blackiini, Callosciurini, Cedromurinae, Comtia, Cynomyoides, Douglassciurus, Forsythia, Funambulini, Hesperopetes, Heteroxerus, Marmotini, Miosciurus, Miospermophilus, Nototamias, Oligosciurus, Paenemarmota, Palaearctomys, Palaeosciurus, Parapaenemarmota, Paratamias, Petauristodon, Pliopetaurista, Pliopetes, Pliosciuropterus, Prospermophilus, Protosciurus, Protospermophilus, Protoxerini, Pteromyinae, Ratufini, Sciurillus, Sciurinae, Sciurini, Sciurion, Sciuropterus, Sciurotamias, Vulcanisciurus, Xerini
Subtaxa: Tamiasciurus
Ecology: scansorial granivore-frugivore
Distribution:
• Quaternary of Canada (5: Alberta, British Columbia, Ontario, Quebec collections), United States (28: Arkansas, California, Colorado, Maryland, Missouri, Montana, Tennessee, Virginia, West Virginia)
• Pliocene of China (1)
Total: 34 collections including 37 occurrences