†subfamily Meniscomyinae Rensberger 1981 (mountain beaver)
Mammalia - Rodentia - Aplodontidae
Parent taxon: Aplodontidae according to B. Wang 1987
Sister taxa: Altasciurus, Ameniscomys, Ansomyinae, Aplodontia, Brachygaulus, Dakotallomys, Leptoromys, Liodontia, Lophallomys, Niglarodon, Ninamys, Oligopetes, Paracitellus, Plesispermophilus, Prosciurinae, Prosciurus, Pseudaplodon, Sciurodon, Sewelleladon, Tardontia, Trigonomys
Subtaxa: Meniscomys Promeniscomys
Ecology: fossorial herbivore
Distribution:
• Arikareean of United States (7: California, Montana, Nevada, Oregon, Wyoming collections)
• Oligocene of China (2), Mongolia (5), United States (4: Nebraska, Oregon, South Dakota)
Total: 18 collections each including a single occurrence