Oligoryzomys microtis, also known as the Small-eared Colilargo or Small-eared Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in western Brazil, eastern Peru, Bolivia, and northern Paraguay.
Musser, G.G. and Carleton, M.D. 2005. Superfamily Muroidea. Pp. 8941531 in Wilson, D.E. and Reeder, D.M. (eds.). Mammal Species of the World: a taxonomic and geographic reference. 3rd ed. Baltimore: The Johns Hopkins University Press, 2 vols., 2142 pp. ISBN 978-0-8018-8221-0
Patton, J., Weksler, M., Bonvicino, C. and Percequillo, A. 2008. . In IUCN. IUCN Red List of Threatened Species. Version 2009.2. < www.iucnredlist.org>. Downloaded on November 28, 2009.
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