Thaptomys Thomas 1916

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 : 1179

Thaptomys Thomas 1916

Thaptomys Thomas 1916 , Ann. Mag. Nat. Hist., ser. 8, 18: 339.

Type Species: Hesperomys subterraneus Hensel 1873

Species and subspecies: 1 species:

Species Thaptomys nigrita (Lichtenstein 1829)

Discussion: Akodontini. Following its description as an akodontine genus, the taxon has been usually retained as a subgenus of Akodon (Cabrera, 1961; Ellerman, 1941; Massoia, 1963 a) or even a full synonym of the nominate subgenus (Reig, 1987). Recently, Hershkovitz (1990 a, 1998) has reasserted the singular morphological traits of the taxon as "definitely non Akodon " and concurred with Thomas’ (1916 c) generic segregation. Cladistic interpretations of cytochrome b sequences portray nigrita as genetically highly divergent from Akodon proper, either as sister group to that genus ( Smith and Patton, 1999), to Necromys (D’Elía et al., 2003), or to the clade Necromys Thalpomys (D’Elía, 2003).