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 Otomyinae Thomas, 1897 - African swamp rats see Subfamily Murinae Batsch, 1788
           Genus Otomys Cuvier, 1824 - African swamp rats
             01 Otomys anchietae Bocage, 1882
             02 Otomys angoniensis Wroughton, 1906 - Angoni vlei rat
             03 Otomys denti Thomas, 1906
             04 Otomys irroratus (Brants, 1827) - vlei rat
             05 Otomys laminatus Thomas & Schwann, 1905 - laminate vlei rat
             06 Otomys maximus Roberts, 1924 - large vlei rat
             07 Otomys occidentalis Dieterlen & Van der Straeten, 1992
             08 Otomys saundersiae Roberts, 1929 - Saunder's vlei rat
             09 Otomys sloggetti Thomas, 1902 - Sloggett's vlei rat
             10 Otomys tropicalis Thomas, 1902
             11 Otomys typus Heuglin, 1877
             12 Otomys unisulcatus F. Cuvier, 1829 - bush Karroo rat
             13 Subgenus Anchotomys Thomas, 1918 see Genus Otomys Cuvier, 1824