Systematics of the genus Oecomys (Sigmodontinae: Oryzomyini): molecular phylogenetic, cytogenetic and morphological approaches reveal cryptic species - Suárez-Villota, Elkin Y; Carmignotto, Ana Paula; Brandão, Marcus Vinícius; Percequillo, Alexandre Reis; Silva, Maria José de J (Zoological Journal of the Linnean Society, 2018)