Tanyuromys aphrastus, known as the long-tailed sigmodontomys,Musser, G.G. and Carleton, M.D. 2005. Superfamily Muroidea. Pp. 894–1531 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. Harris's rice water rat, or the long-tailed rice rat,Duff, A. and Lawson, A. 2004. Mammals of the World: A checklist. New Haven: A & C Black. is a species of rodent in the family Cricetidae. It is known from Costa Rica, Panama, and Ecuador. In 2012, it was reassigned to its current genus from Sigmodontomys.
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