Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Goodrich, 1930
         Amniota Haeckel, 1866 - amniotes
           Class Mammalia Linnaeus, 1758 - mammals
             Subclass Theria Parker & Haswell, 1897
               Theria of Metatherian-Eutherian grade
                 Infraclass Eutheria Gill, 1872
                   Order Rodentia Bowdich, 1821 - rodents
                     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
                       1 Infraorder Bathygeromorpha see Parvorder Bathyergomorphi Tullberg, 1899
                       2 Infraorder Hystricomorpha Brandt, 1855 [monotypic] see Suborder Hystricomorpha Brandt, 1855
                       3 Infraorder Phiomorpha Lavocat, 1962 [monotypic] see Parvorder Phiomorpha Lavocat, 1967
                       4 Infraorder Caviomorpha Wood & Patterson, 1955 see Parvorder Caviomorpha Wood & Patterson, 1955