Megaoryzomys curioi (Niethammer, 1964)

Galapágos giant rat



Taxonomy & Nomenclature



Conservation Status


Last record: Late Quaternary; 1600 (Fisher & Blomberg, 2012)

IUCN RedList status: Extinct



Santa Cruz, Galapágos Islands


Biology & Ecology




VCCDRS 54866
VCCDRS 55281

For full details, see: and






Original scientific description:

Niethammer, J. (1964). Contribution a la connaissance des mammiferes terrestres de l'ile Indefatigable (=Santa Cruz), Galapagos. Résultats de l'expedition Allemagne aux Galapagos 1962/63. Mammalia, 28:593-606.


Other references:

Alcover, Josep Antoni et al. (1998). Mammal Species of the World: Additional Data on Insular Mammals. American Museum Novitates 3248, 29 pp., 1 table.

Fisher, Diana O. and Blomberg, Simon P. (2012). Inferring Extinction of Mammals from Sighting Records, Threats, and Biological Traits. Conservation Biology 26(1): 57-67.

Hutterer, Rainer and Oromi, P. (1993). La rata gigante de la Isla Santa Cruz, Galapagos: Algunos datos y problemas. Resultados Cientificos del Proyecto Galapagos, Patrimonio de la Humanidad, Museo de Ciencias Naturales, Tenerife 4: 63-76.

Musser, G.G. and Carleton, M.D. 2005. Superfamily Muroidea. In: D.E. Wilson and D.A. Reeder (eds), Mammal Species of the World: a geographic and taxonomic reference, pp. 894-1531. The John Hopkins University Press, Baltimore, USA.

Ronez, Christophe et al. (2021). Tribal allocation and biogeographical significance of one of the largest sigmodontine rodent, the extinct Galápagos Megaoryzomys (Cricetidae). Historical Biology 33(9): 1920-1932.

Steadman, David W. and Ray, C. E. (1982). The Relationships of Megaoryzomys curioi, an Extinct Cricetine Rodent (Muroidea: Muridae) from the Galapagos Islands, Ecuador. Smithsonian Contributions to Paleobiology, 51: 23 pages, 11 figures.

Weksler, M. and Tirira, D. (2008). Megaoryzomys curioi. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.1. ( Downloaded on 12 September 2011.

Weksler, M. and Tirira, D. G. (2019). Megaoryzomys curioi. The IUCN Red List of Threatened Species 2019: e.T136657A22330270. Downloaded on 26 June 2021.

Wilson, D.E. & Reeder, D.M. 2005 Mammal species of the world: a taxonomic and geographic reference. Third edition. Baltimore, MD: John Hopkins University Press.


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