†Montanamus Ostrander 1983 (rodent)
Mammalia - Rodentia - Eomyidae
Parent taxon: Eomyidae according to Ostrander 1983
Sister taxa: Adjidaumo, Apeomyinae, Arikareeomys, Aulolithomys, Centimanomys, Cupressimus, Eomyodon, Eomyops, Eomys, Estramomys, Kansasimys, Keramidomys, Leptodontomys, Ligerimys, Litoyoderimys, Metadjidaumo, Metanoiamys, Namatomys, Orelladjidaumo, Paradjidaumo, Paranamatomys, Protadjidaumo, Pseudotheridomys, Rhodanomys, Ritteneria, Viejadjidaumo, Yoderimys, Zemiodontomys, Zetamys
Subtaxa: Montanamus bjorki
Ecology: ground dwelling herbivore