Ischyromys Leidy 1856 (rodent)

Mammalia - Rodentia - Ischyromyidae

Synonyms: Colotaxis Cope 1873, Gymnoptychus Cope 1873, Titanotheriomys Miller and Gidley 1920

Full reference: J. Leidy. 1856. Notice of remains of extinct Mammalia, discovered by Dr. F. V. Hayden in Nebraska Territory. Proceedings of the Academy of Natural Sciences of Philadelphia 8:88-90

Parent taxon: Ischyromyidae according to W. W. Korth 2014

See also Alroy 2002, Cope 1879, Cope 1881, Hay 1902, Heaton 1996, Howe 1966, Johnson 1966, Kihm 2013, Korth 1994, Korth and Emry 2007, Lambe 1908, Matthew 1910, McKenna and Bell 1997, Troxell 1921, Troxell 1922, Wang et al. 1998, Wood 1937, Wood 1969, Wood 1976 and Wood 1980

Sister taxa: Acritoparamys, Ailuravinae, Apatosciuravus, Churcheria, Decticadapis, Hulgana, Ischyromyinae, Leptotomus, Lophiparamys, Microparamyinae, Notoparamys, Paramyinae, Paramys, Pelycomys, Pseudoparamyinae, Rapamys, Tapomys, Thisbemys, Tillomys

Subtaxa: Ischyromys blacki Ischyromys douglassi Ischyromys junctus Ischyromys parvidens Ischyromys typus Ischyromys typus nanus Ischyromys veterior

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Type: Ischyromys typus

Ecology: ground dwelling herbivore


• Oligocene of United States (68: Colorado, Montana, Nebraska, North Dakota, South Dakota, Wyoming collections)

• Eocene of Canada (3: Saskatchewan), United States (53: California, Colorado, Montana, Nebraska, North Dakota, South Dakota, Texas, Wyoming)

Total: 124 collections including 135 occurrences

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Specimen images are retrieved through the ePANDDA API.

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