Mammalia - Rodentia - Heliscomyidae
Full reference: W. W. Korth. 1995. The Skull and Upper Dentition of Heliscomys senex Wood (Heliscomyidae: Rodentia). Journal of Paleontology 69(1):191-194
Parent taxon: Heliscomys according to W. W. Korth 1995
Sister taxa: Heliscomys (Heliscomys), Heliscomys borealis, Heliscomys hatcheri, Heliscomys macdonaldi, Heliscomys medius, Heliscomys senex, Heliscomys vetus, Heliscomys walshi
Subtaxa: Heliscomys (Syphyriomys) gregoryi Heliscomys (Syphyriomys) ostranderi Heliscomys (Syphyriomys) subtilis
Type: Heliscomys hatcheri
Ecology: ground dwelling herbivore
Distribution:
• Miocene of United States (2: California collections)
• Oligocene of United States (1: Montana)
• Eocene of Canada (2: Saskatchewan), United States (5: Montana, Wyoming)
Total: 10 collections each including a single occurrence