Oryzomys macconnelli Thomas 1910

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 : 1150

Oryzomys macconnelli Thomas 1910

Oryzomys macconnelli Thomas 1910 , Ann. Mag. Nat. Hist., ser. 8, 6: 186.

Type Locality: Guyana, Demerara Dist., Supenaam River, a tributary of the Lower Essequibo.

Vernacular Names: MacConnell's Oryzomys.

Synonyms: Oryzomys incertus J. A. Allen 1913 ; Oryzomys mureliae J. A. Allen 1915 .

Distribution: Tropical evergreen rain forest, sea level to 1524 m, of SC Colombia, E Ecuador and Perú, eastwards to S Venezuela, Guianas, and N Brazil (see Musser et al., 1998:Fig. 78).

Conservation: IUCN – Lower Risk (lc).

Discussion: Included in O. capito (= O. megacephalus ) by Hershkovitz (1960) but retained as species by Cabrera (1961). Morphological and karyotypic basis for species recognition reinforced by Pine (1973), Gardner and Patton (1976), and Husson (1978) (and see comments under O. megacephalus ). Musser et al. (1998) contributed a synopsis of its distribution, chromosomal variation, and morphological discrimination from related oryzomyines; differences in karyotype and cytochrome b haplotypes ( Patton et al., 2000) intimate that macconnelli as presently defined is a composite of two species. Phylogeographic relationships among populations of O. macconnelli and between O. macconnelli and other nitidus group species examined by Costa (2003).