Oligoryzomys fulvescens (Saussure 1860)

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 : 1141

Oligoryzomys fulvescens (Saussure 1860)

[Oligoryzomys] fulvescens (Saussure 1860) , Rev. Mag. Zool. Paris, ser. 2, 12: 102.

Type Locality: México, Veracruz State, Orizaba (as restricted by Merriam, 1901 a:295) .

Vernacular Names: Fulvous Colilargo.

Synonyms: Oligoryzomys costaricensis (J. A. Allen 1893) ; Oligoryzomys delicatus (J. A. Allen and Chapman 1897) ; Oligoryzomys fulvescens (Saussure 1860) ; Oligoryzomys engraciae ( Osgood 1945) ; Oligoryzomys lenis (Goldman 1915) ; Oligoryzomys mayensis ( Goldman 1918) ; Oligoryzomys messorius (Thomas 1901) ; Oligoryzomys munchiquensis (J. A. Allen 1912) ; Oligoryzomys navus (Bangs 1899) ; Oligoryzomys nicaraguae (J. A. Allen 1910) ; Oligoryzomys pacificus ( Hooper 1952) ; Oligoryzomys tenuipes (J. A. Allen 1904) .

Distribution: W and E versants of S México, through Central America, to Ecuador, N and C Venezuela, Guianas, and northernmost Brazil in South America.

Conservation: IUCN – Lower Risk (lc).

Discussion: All Middle American forms retained as subspecies by some (see Hall, 1981; Jones and Engstrom, 1986). Morphometric variation among Middle American forms evaluated by Carleton and Musser (1995) and their morphology contrasted with O. vegetus . Reported karyotypic variation intimates that more than one species occurs among the listed synonyms ( Andrades-Miranda et al., 2001 a; Gardner and Patton, 1976; Haiduk et al., 1979), whose status, particularly the South American taxa provisionally associated by Carleton and Musser (1995), warrants additional study. Linares (1998), e.g., recognized all Venezuelan populations (except O. griseolus ) as O. fulvescens ; whereas, Andrades-Miranda et al. (2001 a) listed specimens from Roraima, Brazil, as O. cf. messorius , a form described from Guyana; and see Voss et al. (2001) for another regional perspective regarding discrimination and specific assignment of Guianan samples vis a vis lowland populations in Middle America ( O. fulvescens ) and N Brazil ( O. microtis ).