Mammalia - Rodentia - Ischyromyidae
Parent taxon: Rodentia according to W. W. Korth et al. 2022
See also Dunn and Rasmussen 2007, Flower and Lydekker 1891, Hay 1902, Korth 2014, Lambe 1908, Lofgren et al. 2020, McKenna and Bell 1997 and Wood 1958
Sister taxa: Alagomyidae, Allactagidae, Allomyidae, Anomalomyidae, Anomaluroidea, Aplodontoidea, Archetypomyidae, Callodontomys, Castorimorpha, Cavina, Cercolabidae, Conilurus, Ctenohystrica, Cylindrodontidae, Dolosimus, Downsimys, Echinomyidae, Ectropomys, Entoptychidae, Epeiromys, Eryomyidae, Eryomyina, Florentiamyidae, Gliroidea, Homocentrus, Hystricognatha, Ischyromyiformes, Ivanantonia, Megacricetodontidae, Muriformia, Mylagaulidae, Myodonta, Myomorpha, Pairomys, Paramyidae, Petauristidae, Pipestoneomyidae, Protrogomorpha, Pseudomys, Quercymys, Remyidae, Sciurognathi, Sciuroidea, Sciuromorpha, Siphneidae, Taeniodus, Theridomyoidea, Yuomyidae, Zamoramys, Zelomyidae
Subtaxa: Acritoparamys Ailuravinae Apatosciuravus Churcheria Decticadapis Hulgana Ischyromyinae Ischyromys Leptotomus Lophiparamys Microparamyinae Notoparamys Paramyinae Paramys Pseudoparamyinae Rapamys Tapomys Thisbemys
Ecology: ground dwelling herbivore
Distribution:
• Oligocene of United States (68: Colorado, Montana, Nebraska, North Dakota, South Dakota, Wyoming collections)
• Eocene to Oligocene of China (1), United States (1: Nebraska)
• Eocene of Belgium (2), Canada (8: Northwest Territories, Saskatchewan), China (7), France (20), Germany (4), India (3), Kazakhstan (1), Mexico (1), Portugal (1), Spain (5), Switzerland (1), the United Kingdom (11), United States (589: California, Colorado, Mississippi, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oregon, South Dakota, Texas, Utah, Virginia, Wyoming)
• Clarkforkian of United States (13: Colorado, Montana, Wyoming)
• Paleocene to Eocene of United States (1: Wyoming)
• Paleocene of France (1)
Total: 738 collections including 1052 occurrences