Isthmomys Hooper and Musser 1964

Wilson, Don E. & Reeder, DeeAnn, 2005, Order Rodentia - Family Cricetidae, Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore: The Johns Hopkins University Press, pp. 955-1189 : 1051

Isthmomys Hooper and Musser 1964

Isthmomys Hooper and Musser 1964 , Occas. Pap. Mus . Zool., Univ. Michigan, 635: 12.

Type Species: Megadontomys flavidus Bangs 1902

Species and subspecies: 2 species:

Species Isthmomys flavidus ( Bangs 1902)

Species Isthmomys pirrensis (Goldman 1912)

Discussion: Reithrodontomyini. Species associated here were originally classified in Megadontomys , used either as a genus or as a subgenus of Peromyscus ( Osgood, 1909) . Isthmomys was later diagnosed as a subgenus of Peromyscus ( Hooper and Musser, 1964b) and maintained at this rank by Hooper (1968); diagnosis emended and accorded generic status by Carleton (1980, 1989). Sister-group relationship with Megadontomys proposed by Carleton (1980) but unsupported by chromosomal banding data ( Stangl and Baker, 1984b). Aspects of morphology considered by Carleton (1973, 1980), Hooper and Musser (1964b), and Linzey and Layne (1969, 1974); karyology by Stangl and Baker (1984b).