Galapagos Species Database

The Galapagos Species Database shares the information about the species from our Natural History Collections.

Nesoryzomys indefessus (Thomas, 1899)

Raton de Santa Cruz, Indefatigable Galapagos mouse

Taxonomy

Domain
Eukaryota

Kingdom
Animalia

Phylum
Chordata

Class
Mammalia

Order
Rodentia

Family
Cricetidae

Genus
Nesoryzomys

Species
indefessus

Taxon category: Accepted

Origin: Endemic

Status

Extinct

Distribution

Distribution: It was present in Santa Cruz and Baltra Islands. The last collected were in 1934 and 1929 respectively. First report were in 1897 and 1898 respectively.

References

  • Jiménez-Uzcátegui, G. Milstead, B., Márquez, C., Zabala, J., Buitrón, P., Llerena, A., et al. (2007) Galapagos vertebrates: endangered status and conservation actions. Galapagos Report 2006–2007. Charles Darwin Foundation, Puerto Ayora, p. 104–110.
  • Steadman, D. Stafford, T.W., Donahue, D.J. & Jull, A.J.T. (1991) Chronology of Holocene vertebrate extinction in the Galápagos Islands. Quaternary Research 36(1): 126-133.
  • Snell, H.L. Tye, A., Causton, C.E. & Bensted-Smith, R. (1999) Estado y amenazas de la biodiversidad terretre de Galápagos. Visión para la biodiversidad de las islas Galápagos. Fundación Charles Darwin para las islas Galápagos y WWF. Puerto Ayora, Galápagos.
  • Harris, D.B. (2006) Introduced black rats abd endemic Galapagos rice rats: competition, coexistence and conservation. A thesis submitted for the degree of Doctor of Philosophy. Linacre College, Oxford.
  • Dowler R.C. Carroll, D.S. & Edwards, C.W. (2000) Rediscovery of rodents (Genus Nesoryzomys) considered extint in the Galapagos Island. Oryx 34(2): 109-117.
  • Harris, D.B. MacDonald, D.W. (2007) Population ecology of the endemic rodent Nesoryzomys swarthi in the tropical desert of the Galapagos Islands. Journal of Mammalogy 88 (1): 208-219.
  • IUCN (2015) The IUCN Red List of Threatened Species. Version 2015-4. <www.iucnredlist.org>. Downloaded on 20 November 2015.

You are welcome to download and use the information found in this page, acknowledging its source.

This page should be cited as follows:

"Galapagos Species Database, Nesoryzomys indefessus", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=5231. Accessed 9 June 2025.