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Nesoryzomys indefessus
Conservation status
Extinct (1930s)  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Cricetidae
Subfamily:	Sigmodontinae
Genus:	Nesoryzomys
Species:	†N. indefessus
Binomial name
†Nesoryzomys indefessus (Thomas, 1899)

Nesoryzomys indefessus, also known as the Santa Cruz nesoryzomys or Indefatigable Galápagos mouse, is an extinct species of rodent from the genus Nesoryzomys of family Cricetidae from Galápagos Islands of Ecuador. It formerly lived on Santa Cruz Island, but is now extinct, probably due to the introduction of black rats. Another related rodent, N. narboroughi, is sometimes considered to be a subspecies of N. indefessus.

Etymology

Its specific name is Latin for "unwearied, indefatigable", but the species was named after its island, which was formerly known as "Indefatigable Island" after a ship with the same name.

References

1. Tirira, D.G.; Weksler, M. (2019). "Nesoryzomys indefessus". IUCN Red List of Threatened Species. 2019: e.T14708A22390443. doi:10.2305/IUCN.UK.2019-1.RLTS.T14708A22390443.en.
2. Musser and Carleton, 2005
3. Duff and Lawson, 2004
4. Mammal species of the world: a taxonomic and geographic reference (3. Aufl ed.). Baltimore & London: Johns Hopkins University Press. 2005. ISBN 978-0-8018-8221-0.

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• IUCN Red List extinct species
• Nesoryzomys
• Extinct rodents
• Extinct mammals of South America
• Endemic fauna of the Galápagos Islands
• Rodent extinctions since 1500
• Taxa named by Oldfield Thomas
• Species made extinct by human activities
• Mammals described in 1899
• Sigmodontinae stubs