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Waterhouse's swamp rat
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Cricetidae
Subfamily:	Sigmodontinae
Genus:	Scapteromys
Species:	S. tumidus
Binomial name
Scapteromys tumidus (Waterhouse, 1837)

Waterhouse's swamp rat (Scapteromys tumidus) is a semiaquatic rodent species from South America. It is found in southern Brazil, Uruguay and northern Argentina, where it lives in freshwater and salt marshes, as well as open grassland of the pampas. Its karyotype has 2n = 24, substantially lower than its closest relative S. aquaticus with 2n = 32.

References

1. ^ Queirolo, D.; Christoff, A.; D'Elia, G.; Pardinas, U. (2017) . "Scapteromys tumidus". IUCN Red List of Threatened Species. 2017: e.T19945A121711379. Retrieved 28 June 2020.
2. Musser, G. G.; Carleton, M. D. (2005). "Scapteromys tumidus". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 1172. ISBN 978-0-8018-8221-0. OCLC 62265494.
3. Musser, G. G.; Carleton, M. D. (2005). "Scapteromys aquaticus". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 1172. ISBN 978-0-8018-8221-0. OCLC 62265494.

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