Order Rodentia - Family Cricetidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 955 1189 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Megadontomys Merriam 1898 Megadontomys Merriam 1898 , Proc. Biol. Soc. Wash., 12: 115 . Type Species: Peromyscus thomasi Merriam 1898 Species and subspecies: 3 species: Species Megadontomys cryophilus Musser 1964 Species Megadontomys nelsoni Merriam 1898 Species Megadontomys thomasi Merriam 1898 Discussion: Reithrodontomyini. Used variably as a genus until Osgood (1909) stabilized its taxonomic ranking as a subgenus of Peromyscus , and so followed by Hooper and Musser (1964 b ) and Hooper (1968). Carleton (1980 , 1989) viewed the relationships and differentiation of Megadontomys at the generic level (but see Rogers, 1983). Aspects of morphology studied by Carleton (1973 , 1980 ), Hooper and Musser (1964 b ) , and Linzey and Layne (1969 , 1974 ). Karyological affinities evaluated by Rogers (1983), Rogers et al. (1984), and Stangl and Baker (1984) . Werbitsky and Kilpatrick (1987) reported relatively low levels of genetic similarity among the nominal forms.