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 Sigmodontomys alfari J. A. Allen 1897 Sigmodontomys alfari J. A. Allen 1897 , Bull. Am. Mus . Nat. Hist., 9: 39 . Type Locality: Costa Rica , Limón Prov. , 3 mi ( 5 km ) E Guápiles, Jiménez, 700 ft ( 213 m ). Vernacular Names: Short-tailed Sigmodontomys . Synonyms: Sigmodontomys barbacoas (J. A. Allen 1916 ) ; Sigmodontomys efficax Goldman 1913 ; Sigmodontomys esmeraldarum Thomas 1901 ; Sigmodontomys ochraceus (J. A. Allen 1908 ) ; Sigmodontomys ochrinus (Thomas 1921) ; Sigmodontomys russulus (Thomas 1897) . Distribution: Lowland forest from E Honduras to Panamá ; C and W Colombia to NW Venezuela and NW Ecuador (see Musser et al., 1998:Fig. 51). Conservation: IUCN – Lower Risk (lc). Discussion: Karyotype reported by Gardner and Patton (1976) . Musser et al. (1998) summarized locality records and compared them with other oryzomyines having trans-Andean distributions.