Paronychomys is an extinct genus of Cricetidae that existed in Arizona during the Hemphillian period.
Taxonomy Three species of Paronychomys are known: P. alticuspis, P. lemredfieldi, and P. tuttlei. L. L. Jacobs. 1977. Rodents of the Hemphillian age Redington local fauna, San Pedro Valley, Arizona. Journal of Paleontology 51(3):505-519J. A. Baskin. 1979. Small Mammals of the Hemphillian Age White Cone Local Fauna, Northeastern Arizona. Journal of Paleontology 53(3):695-708 "Paronychomys" shotwelli, described by Korth (2011) from Hemphilian-age deposits in Oregon, is now placed in the separate genus Tsaphanomys.W. W. Korth. 2011. New Species of Cricetid Rodents (Mammalia) from the Late Miocene (Hemphillian) Previously Referred to Peromyscus pliocenicus Wilson. Annals of Carnegie Museum 79(2):137-147Robert A. Martin; Richard J. Zakrzewski (2019). "On the ancestry of woodrats". Journal of Mammalogy. in press. doi:10.1093/jmammal/gyz105.
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