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 Sigmodon (Sigmodon) inopinatus Anthony 1924 Sigmodon (Sigmodon) inopinatus Anthony 1924 , Am. Mus . Novit., 114: 3 . Type Locality: Ecuador , Chimborazo Prov. , Mt Chimborazo , Urbina, 11,400 ft ( 3474 m ). Vernacular Names: Ecuadorian Cotton Rat . Distribution: Known only from high Andes in Azuay and Chimborazo provinces, Ecuador . Conservation: IUCN – Lower Risk (lc). Discussion: Subgenus Sigmodon ( S. fulviventer species group?). Lumped under S. hispidus by Cabrera (1961), following the footnoted opinion of Hershkovitz (1955 a ) , but distinctive morphology reasserted and species reinstated by Voss (1992) .