Mammalia - Rodentia - Mylagaulidae
Parent taxon: Mylagaulidae according to W. W. Korth 2013
Sister taxa: Crucimys, Promylagaulinae
Subtaxa: Alphagaulus Ceratogaulus Epigaulus Galbreathia Hesperogaulus Mesogaulus Mylagaulodon Mylagaulus Notogaulus Pterogaulus Simpligaulus Tschalimys Umbogaulus
Ecology: ground dwelling herbivore
Distribution:
• Hemphillian of United States (12: Florida, Kansas, Nebraska, Nevada, Oregon collections)
• Miocene of Canada (8: Saskatchewan), United States (89: Colorado, Florida, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, Oregon, South Dakota, Texas, Wyoming)
• Harrisonian of United States (3: Nebraska, Oregon, South Dakota)
• Arikareean of United States (1: Oregon)
Total: 113 collections including 131 occurrences