Three species of Paronychomys are known: P. alticuspis, P. lemredfieldi, and P. tuttlei.[2][3]"Paronychomys" shotwelli, described by Korth (2011) from Hemphilian-age deposits in Oregon, is now placed in the separate genus Tsaphanomys.[4][5]
^ L. L. Jacobs. 1977. Rodents of the Hemphillian age Redington local fauna, San Pedro Valley, Arizona. Journal of Paleontology 51(3):505-519
^J. A. Baskin. 1979. Small Mammals of the Hemphillian Age White Cone Local Fauna, Northeastern Arizona. Journal of Paleontology 53(3):695-708
^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):137-147
^Robert A. Martin; Richard J. Zakrzewski (2019). "On the ancestry of woodrats". Journal of Mammalogy. in press. doi:10.1093/jmammal/gyz105.