Mammalia - Rodentia - Erethizontidae
Parent taxon: Erethizontoidea according to M. Boivin et al. 2017
See also Carroll 1988, Hay 1902, Huchon and Douzery 2001, Hulbert 1997, Kramarz et al. 2010, Kurten and Anderson 1980, Nowak 1991, Nowak 1999, Wood 1958 and Wood and Patterson 1959
Sister taxa: Eosteiromys, Kichkasteiromys, Nuyuyomys, Plesiosteiromys, Shapajamys, Steiromys
Subtaxa: Branisamyopsis Cholamys Coendou Eopululo Erethizon Erethizontinae Hyposteiromys Hypsosteiromys Microsteiromys Palaeosteiromys Paradoxomys Parasteiromys Protosteiromys
Ecology: arboreal herbivore
Distribution:
• Quaternary of Argentina (1 collection), Bolivia (2), Brazil (6), Canada (4: Alberta, Ontario, Quebec), Mexico (2), Panama (1), Peru (1), United States (58: Alaska, Arkansas, California, Colorado, Florida, Idaho, Maryland, Missouri, Nebraska, New Mexico, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, West Virginia), Uruguay (2), Venezuela (1)
• Blancan of United States (9: Arizona, California, Florida, Idaho)
• Pliocene to Pleistocene of Venezuela (1)
• Pliocene of Argentina (1), Colombia (1)
• Huayquerian of Argentina (1), Bolivia (1)
• Miocene of Argentina (13), Brazil (5), Colombia (3)
• Deseadan of Argentina (2), Bolivia (2)
• Oligocene of Peru (2)
Total: 119 collections including 133 occurrences