Some articles on relationships, intergeneric relationships:
Oryzomyini - Taxonomy - Internal Classification
... The relationships among the oryzomyine genera have long been obscure, although several studies provided insights into the relations of some genera ... IRBP, a nuclear gene, and morphology to assess the relationships among the members of Oryzomyini ... He provided support for several intergeneric relationships and clarified the scale of the Oryzomys problem, as species of Oryzomys appeared in about ten separate clades ...
... The relationships among the oryzomyine genera have long been obscure, although several studies provided insights into the relations of some genera ... IRBP, a nuclear gene, and morphology to assess the relationships among the members of Oryzomyini ... He provided support for several intergeneric relationships and clarified the scale of the Oryzomys problem, as species of Oryzomys appeared in about ten separate clades ...