†subfamily Geomyinae Bonaparte 1845 (pocket gopher)
Mammalia - Rodentia - Geomyidae
Parent taxon: Geomyidae according to S. R. May et al. 2011
See also Korth 1987
Sister taxa: Cratogeomys, Geomys, Microdipodops, Mojavemys, Nerterogeomys, Orthogeomys, Pappogeomys, Phelosaccomys, Pleurolicus, Pliogeomys, Pliosaccomys, Progeomys, Reynoldsomys, Tenudomys, Thomomys, Zygogeomys
Subtaxa: Parapliosaccomys Prothomomys
Ecology: fossorial browser
Distribution:
• Hemphillian of United States (4: California, Nevada, Oregon collections)
• Miocene of United States (17: Kansas, Montana, Nebraska, South Dakota, Wyoming)
• Eocene to Oligocene of Mexico (1)
Total: 22 collections each including a single occurrence