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 Nectomys apicalis Peters 1860 Nectomys apicalis Peters 1860 , Abh. Preuss. Akad. Wiss., 1860: 152 . Type Locality: Ecuador , Napo Prov. , Tena, 512 m (as restricted by Hershkovitz, 1944:53 ). Vernacular Names: Western Amazonian Nectomys . Synonyms: Nectomys fulvinus Thomas 1897 ; Nectomys garleppii Thomas 1899 ; Nectomys montanus Hershkovitz 1944 ; Nectomys napensis Hershkovitz 1944 ; Nectomys saturatus Thomas 1897 ; Nectomys vallensis Hershkovitz 1944 . Distribution: Westernmost Brazil ( Acre and Amazonas ), and contiguous lowlands and Andean foothills of C and E Ecuador , E Perú , and WC Bolivia (see Anderson, 1997 :Fig. 685; Patton et al., 2000 :Fig. 78); distributional limits uncertain. Discussion: Argued by Patton et al. (2000) as the oldest name for those water rat populations in western Amazonia with a 2n = 38-42 karyotype, including garleppii , which Reig (in Honacki et al., 1982 ) and Barros et al. (1992) recognized as a species. More than a single species is likely represented among the listed synonyms, whether they belong to one of the other species recognized here or to some other species yet to be determined.