Microryzomys Thomas 1917

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 : 1126

Microryzomys Thomas 1917

Microryzomys Thomas 1917 , Smithson. Misc. Coll., 68: 1.

Type Species: Hesperomys minutus Tomes 1860

Synonyms: Thallomyscus Thomas 1926 .

Species and subspecies: 2 species:

Species Microryzomys altissimus Osgood 1933

Species Microryzomys minutus (Tomes 1860)

Discussion: Oryzomyini . Named as a subgenus of Oryzomys and either retained as such (Cabrera, 1961; Ellerman, 1941; Osgood, 1933 a) or placed in synonymy with Oligoryzomys ( Gyldenstolpe, 1932; Tate, 1932 e; Thomas, 1926). Junior synonymy of Thallomyscus established by Osgood (1933 a). Raised to genus by Carleton and Musser (1984) and later revised by them (1989). Cladistically primitive member of Oryzomyini , sharing certain morphological traits with Oligoryzomys ( Carleton and Musser, 1989; Carleton and Olson, 1999); sister genus to Neacomys according to gene sequence studies ( Myers et al., 1995; Patton and da Silva, 1995; Smith and Patton, 1999) or to the Neacomys Oligoryzomys clade according to allozymic analyses ( Dickerman and Yates, 1995).