Mammalia - Rodentia - Sciuridae
Parent taxon: Sciuridae according to W. W. Korth 2014
Sister taxa: Albanensia, Arctomyoides, Blackiini, Callosciurini, 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, Tamiasciurini, Vulcanisciurus, Xerini
Subtaxa: Cedromus Kherem Oligospermophilus
Ecology: scansorial granivore-frugivore
Distribution:
• Miocene of Mongolia (4 collections)
• Arikareean of United States (3: Nebraska)
• Oligocene of Canada (1: Saskatchewan), Mongolia (2), United States (21: Colorado, Nebraska, North Dakota, South Dakota, Wyoming)
• Eocene to Oligocene of United States (1: Nebraska)
• Eocene of United States (2: Nebraska, Wyoming)
Total: 34 collections including 40 occurrences