Neacomys Thomas 1900

Neacomys Thomas 1900, Ann. Mag. Nat. Hist., ser. 7, 5: 153.

Type Species: Hesperomys spinosus Thomas 1882

Species and subspecies: 8 species:

Species Neacomys dubosti Voss, Lunde, and Simmons 2001

Species Neacomys guianae Thomas 1905

Species Neacomys minutus Patton, da Silva, and Malcolm 2000

Species Neacomys musseri Patton, da Silva, and Malcolm 2000

Species Neacomys paracou Voss, Lunde, and Simmons 2001

Species Neacomys pictus Goldman 1912

Species Neacomys spinosus (Thomas 1882)

Species Neacomys tenuipes Thomas 1900

Discussion: Oryzomyini . Sister genus to Microryzomys according to gene sequence studies (Myers et al., 1995; Patton and da Silva, 1995; Smith and Patton, 1999; Weksler, 2003) or to Oligoryzomys according to allozymic analyses (Dickerman and Yates, 1995). Recent taxonomic descriptions and detailed regional comparisons have markedly improved understanding of species diversity and their morphological discrimination (Patton et al., 2000; Voss et al., 2001). Delineation of yet other species and enhancement of distributional limits still required (e.g., see Malygin and Rosmiarek, 1996; Patton et al., 2000). Preliminary molecular geographic patterns discerned by Patton et al. (2000) offer a template for future taxonomic studies.