 Eremoryzomys is now one of about 28 genera in the tribe Oryzomyini , which includes well over a hundred species distributed mainly in South America , including nearby islands such as the Galápagos Islands and some of the Antilles . Oryzomyini is one of several tribes recognized within the subfamily Sigmodontinae , which encompasses hundreds of species found across South America and into southern North America . Sigmodontinae itself is the largest subfamily of the family Cricetidae , other members of which include voles , lemmings , hamsters , and deermice , all mainly from Eurasia and North America . 
