Order Rodentia - Family Cricetidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 955 1189 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Akodon aerosus Thomas 1913 Akodon aerosus Thomas 1913 , Ann. Mag. Nat. Hist., ser. 8, 11: 406 . Type Locality: Ecuador , Tungurahua Prov. , upper Río Pastaza , Mirador, 1500 m . Vernacular Names: Yungas Akodont . Synonyms: Akodon baliolus Osgood 1915 . Distribution: Upper montane forests along E Andean slopes, 1200-2000 m, in Ecuador , Perú , and C Bolivia ( Anderson, 1997 ; Patton and Smith, 1992 ). Conservation: IUCN – Lower Risk (lc). Discussion: Type species of Chalcomys , usually placed as a synonym of the subgenus Akodon (Cabrera, 1961; Reig, 1987). Formerly included as a subspecies of A. urichi by Cabrera (1961), but Gardner and Patton (1976) , noting the pronounced difference in diploid number, listed the two as separate species; we include urichi under Necromys (see that account). Probably more than one species yet masquerades under the name of A. aerosus (see Patton and Smith, 1992 ; Patton et al., 1990); status of surdus as a possible junior synonym needs resolution (see Patton and Smith, 1992 ). Anderson (1997) recognized baliolus as a valid subspecies for Bolivian populations.