Tribe Sigmodontini Wagner 1843 (mouse)
Mammalia - Rodentia - Cricetidae
Parent taxon: Sigmodontinae according to S. J. Steppan et al. 2004
Sister taxa: Abrothrix, Bensonomys, Chelemys, Delomys, Euneomys, Geoxus, Holochilus, Ichthyomyini, Irenomys, Juliomys, Lundomys, Nectomys, Oligoryzomys, Oryzomyalia, Reithrodontomys, Rhipidomys, Scolomys, Thomasomys, Wiedomyini
Subtaxa: Prosigmodon, Sigmodon
Ecology: ground dwelling herbivore