Nectomys Peters 1861 The genus Nectomys comprises six species, N. apicalis (Peters 1861), N. magdalenae (Thomas 1897) (that includes N. m. magdalenae and N. m. grandis (Thomas 1897)), N. palmipes (Allen & Chapman 1893) (that includes N. p. palmipes and N. p. tatei (Hershkovitz 1948)), N. rattus (Pelzeln 1883), N. saturatus (Thomas 1897), and N. squamipes (Brants 1827). Water rats of the genus Nectomys were found in most lowland rainforest biomes in South America, and in the riverine forests of open habitats, such as the Cerrado, Llanos, and other grasslands (Bonvicino & Weksler 2015; Chiquito & Percequillo 2019). All cytogenetic data available for the genus was presented on Table 7, and the distribution of diploid and fundamental number of karyotyped specimens were presented on Fig. 11.

Published as part of Moreira, Camila Do Nascimento, Ventura, Karen, Percequillo, Alexandre Reis & Yonenaga-Yassuda, Yatiyo, 2020, A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes, pp. 1-111 in Zootaxa 4876 (1) on page 38, DOI: 10.11646/zootaxa.4876.1.1, http://zenodo.org/record/4423612