Tribe Protoxerini (squirrel)
PaleoDB taxon number: 92500
Parent taxon: Sciuridae according to J. M. Mercer and V. L. Roth 2003
Sister taxa: Albanensia, Arctomyoides, Blackiini, Callosciurini, Cedromurinae, Comtia, Cynomyoides, Forsythia, Funambulini, Hesperopetes, Heteroxerus, Marmotini, Miosciurus, Miospermophilus, Nototamias, Oligosciurus, Paenemarmota, Palaearctomys, Palaeosciurus, Parapaenemarmota, Paratamias, Petauristodon, Pliopetaurista, Pliopetes, Pliosciuropterus, Prospermophilus, Protosciurus, Protospermophilus, Pteromyinae, Ratufini, Sciurillus, Sciurinae, Sciurini, Sciurion, Sciurotamias, Tamiasciurini, Vulcanisciurus, Xerini
Subtaxa: Epixerus, Funisciurus, Heliosciurus, Myosciurus, Paraxerus, Protoxerus
Ecology: scansorial insectivore