(Hylaeamys oniscus)
Hylaeamys oniscus, the sowbug rice rat, is a rodent species in the genus Hylaeamys of family Cricetidae. It was formerly placed in the genus Oryzomys as Oryzomys oniscus. It occurs only in northeastern Brazil. It is close to Hylaeamys laticeps, which occurs further south in Brazil, and the two have been considered to be the same species.