Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
         Subfamily Sigmodontinae Wagner, 1843
           Genus Oecomys Thomas, 1906 - bicolored rice rats
             01 Oecomys bicolor Tomes, 1860
             02 Oecomys cleberi Locks, 1981
             03 Oecomys concolor Wagner, 1845
             04 Oecomys flavicans Thomas, 1894
             05 Oecomys mamorae Thomas, 1906
             06 Oecomys paricola Thomas, 1904 - arboreal rice rat
             07 Oecomys phaeotis Thomas, 1901
             08 Oecomys rex Thomas, 1910
             09 Oecomys roberti Thomas, 1903[1904]
             10 Oecomys rutilus Anthony, 1921
             11 Oecomys speciosus J. A. Allen & Chapman, 1893
             12 Oecomys superans Thomas, 1911
             13 Oecomys trinitatis J. A. Allen & Chapman, 1893