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Temporal range: Pleistocene to Recent
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Echimyidae
Subfamily: Eumysopinae
Genus: Euryzygomatomys
Goeldi, 1901
Species: E. spinosus
Binomial name
Euryzygomatomys spinosus
(Fischer, 1814)

The Guiara, Euryzygomatomys spinosus, or Fischer's Guiara, is a spiny rat species from South America. It is found in Argentina, Brazil and Paraguay. It is one of only two species in the genus Euryzygomatomys.


  1. ^ Catzeflis, F., Patton, J., Percequillo, A., Bonvicino, C. & Weksler, M. (2008). Euryzygomatomys spinosus. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 5 January 2009.