Small Mammals Of The Mayo River Basin In Northern Peru, With The Description Of A New Species Of Sturnira (Chiroptera: Phyllostomidae) Velazco, Paúl M. Patterson, Bruce D. Bulletin of the American Museum of Natural History 2019 2019-04-05 2019 429 1 69 6RVHG (Pelzeln, 1883) Pelzeln 1883 [201,543,1221,1245] Mammalia Cricetidae Nectomys Animalia Rodentia 49 49 Chordata species rattus  IDENTIFICATION: We consulted descriptions and measurements of  Nectomys rattusprovided by Hershkovitz (1944, as  Nectomys squamipes melanius), Voss et al. (2001, as  Nectomys melanius), Bonvicino and Weksler (2015), and Chiquito et al. (2017). No subspecies are currently recognized in  Nectomys rattus( Bonvicino and Weksler, 2015; Chiquito et al., 2017).  Nectomys rattusis distinguished from other species in the genus by the following combination of characteristics: dorsal fur grayish brown; venter fur pale gray; hind feet lacking hypothenar pads; forefeet with distinct rudiment of thumb with nail; tail scaly but moderately haired; lacrimals contacting the maxillary bone; interparietal much wider than long; and dorsolateral exposition of the exoccipital reduced ( Bonvicino and Weksler, 2015; Chiquito et al., 2017). Our specimen conforms to previous descriptions of the species, and its measurements fall within the range of size variation previously documented.  REMARKS: Our single specimen was captured in a cultivated area. Lareschi and Velazco (2013)reported the mite  Gigantolaelaps goyanensisfrom our specimen. MUSM El Diamante 49 49 MUSM 39281 1 1