Mammalia - Rodentia - Ischyromyidae
Parent taxon: Ischyromyidae according to R. H. Dunn and D. T. Rasmussen 2007
See also Dawson 2001, Sahni and Khare 1973 and Sahni and Srivastava 1976
Sister taxa: Acritoparamys, Ailuravinae, Apatosciuravus, Churcheria, Decticadapis, Hulgana, Ischyromyinae, Ischyromys, Leptotomus, Lophiparamys, Microparamyinae, Notoparamys, Paramys, Pseudoparamyinae, Rapamys, Tapomys, Thisbemys
Subtaxa: Abrosomys Manitshini Metaparamys Paramyini
Ecology: ground dwelling herbivore
Distribution:
• Oligocene of United States (1: South Dakota collection)
• Eocene of Canada (3: Northwest Territories, Saskatchewan), China (1), France (7), Germany (1), Kazakhstan (1), Spain (1), Switzerland (1), the United Kingdom (3), United States (54: California, Colorado, North Dakota, Oregon, Texas, Utah, Wyoming)
Total: 73 collections including 79 occurrences