Sigmodontomys alfari  Sigmodontomys alfari, also known as the short-tailed sigmodontomys, Alfaro's rice water rat, Cana rice rat, or Allen's rice rat, is a species of rodent in the genus "Sigmodontomys" of family Cricetidae. It is found from Honduras through Nicaragua, Costa Rica, and Panama into South America, where it occurs from Venezuela through Colombia to Ecuador.