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Megaoryzomys curioi
Megaoryzomys curioi skull.JPG
Skull of a Megaoryzomys curioi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Subfamily: Sigmodontinae
Genus: Megaoryzomys
Lenglet & Coppois, 1979
Species: M. curioi
Binomial name
Megaoryzomys curioi
(Niethammer, 1964)

Megaoryzomys curioi, also known as the Galápagos giant rat,[2] is an extinct species of sigmodontine rodent, known only from Santa Cruz Island in the Galápagos Islands. It likely met its demise when European settlers introduced invasive species to the island. It is the only species in the genus Megaoryzomys. Its relationships are currently unclear; it has been placed in both Oryzomyini and Thomasomyini in the past.


  1. ^ Weksler, M. & Tirira, D. (2008). "Megaoryzomys curioi". IUCN Red List of Threatened Species. Version 2008. International Union for Conservation of Nature. Retrieved 6 January 2009. 
  2. ^ Musser and Carleton, 2005