Mammalia - Rodentia - Cricetidae

Parent taxon: Sigmodontinae according to L. O. Salles et al. 2006

Sister taxa: Abrothrix, Bensonomys, Chelemys, Delomys, Euneomys, Geoxus, Holochilus, Ichthyomyini, Irenomys, Juliomys, Lundomys, Nectomys, Oryzomyalia, Reithrodontomys, Rhipidomys, Scolomys, Sigmodontini, Thomasomys, Wiedomyini

Subtaxa: Oligoryzomys flavescens, Oligoryzomys longicaudatus

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Ecology: ground dwelling herbivore