After Mckenna & Bell, 1997

    Hystricognatha Woods, 1976
        Hystricomorpha Brandt, 1855
        Hystrichomorphi Brandt, 1855
        Hystrichomorpha Brandt, 1855
        Hystricognatha Woods, 1976
        Hystricognatha Woods; McKenna & Bell, 1997
      including:
        Hystricognathiformes Bryant & McKenna, 1995

        †Tsaganomyidae Matthew & Granger, 1923
             †Tsaganomyinae Matthew & Granger, 1923
             †Tsaganomyidae A.E. Wood, in Patterson & A.E. Wood, 1982
             †Tsaganomyidae Matthew & Granger; McKenna & Bell, 1997

        Laonastidae Jenkins, Kilpatrick, Robinson & Timmins, 2005

        Hystricognathi Tullberg, 1899
            Hystricognathi Tullberg, McKenna & Bell, 1997
          including:
            Aculeata Illiger, 1811
                (non Aculeata Geoffroy Saint-Hilaire, 1795, a synonym of Tachyglossidae)
                (non Aculeata, the poison-stinged wasps)
            Nototrogomorpha Schaub, 1953
            Caviomorpha A.E. Wood, 1955
            Phiomorpha Lavocat, 1967

            Hystricidae Fischer de Waldheim, 1817
                Histricini Fischer de Waldheim, 1817
                Hystricinorum Fischer de Waldheim, 1817
                Hystricidae Gray, 1821
                Hystrices Giebel, 1855
                Hystricida Haeckel, 1866
                Hystricoidea Gill, 1872
                Hystrioidae Miller & Gidley, 1918 (in partim)
                Hystricota Kalandadze & Rautian, 1922
                Hystricidae Fischer de Waldheim; McKenna & Bell, 1997

                Atherurinae Lyon, 1907
                    Atherurinae Lyon; McKenna & Bell, 1997

                Hystricinae Fischer de Waldheim, 1817
                    Histricini Fischer de Waldheim, 1817
                    Hystricina C.L. Bonaparte, 1837
                    Hystricinae Murray, 1866
                    Hystricinae Fischer de Waldheim; McKenna & Bell, 1997

            Erethizontidae Bonaparte, 1845
                Erethyzonina Bonaparte, 1845
                Erethizontidae Thomas, 1897
                Erethizontoidea Simpson, 1945
                Erethizontomorphia Bugge, 1974
                Erethizontidae Bonaparte; McKenna & Bell, 1997
              including:
                Cercolabina Gray, 1843
                Cercolabidae Ameghino, 1889
                Coendidae Trouessart, 1897

                Chaetomyinae Thomas, 1897
                    Chaetomyinae Thomas, 1897
                    Chaetomyinae Thomas; McKenna & Bell, 1997

                †Steiromyinae Ameghino, 1902
                    †Steiromyinae Ameghino, 1902
                    Erethizontinae Bonaparte; McKenna & Bell, 1997 (in partim)
                    †Steiromyinae Ameghino; Candela, 2004

                Erethizontinae Bonaparte, 1845
                    Erethyzonina Bonaparte, 1845
                    Erethizontinae Thomas, 1897
                    Erethizontinae Bonaparte; McKenna & Bell, 1997 (in partim)
                    Coendinae Pocock; Candela, 2000
                    Coendinae Pocock; Candela, 2001
                  including:
                    Cercolabina Gray, 1843
                    Sphingurinae Alston, 1876
                    †Steiromyinae Ameghino, 1902
                    Coendinae Pocock, 1922

            †Myophiomyidae Lavocat, 1973

                †Phiocricetomyinae Lavocat, 1973

                †Myophiomyinae Lavocat, 1973

            †Diamantomyidae Schaub, 1958

                    †Metaphiomyinae Lavocat, 1973

            †Phiomyidae A.E. Wood, 1955

            †Kenyamyidae Lavocat, 1973

            Pteromuridae Tullberg, 1899
                Muriaformia Van der Hoeven, 1858
                Pteromuridae Tullberg, 1899
                Pteromurinae Tullberg, 1899

            Thryonomyidae Pocock, 1922
                Thrynomyidae Pocock, 1922
                Thrynomyoidea A.E. Wood, 1955
                Aulacodina Bonaparte, 1845
                Ulacodidae Brandt, 1855
                Thrynomyidae Pocock; McKenna & Bell, 1997

            Bathyergomorphi Thullberg, 1899
                Bathyergidae Waterhouse, 1841
                Bathyergoidea Osborn, 1910
                Bathyergoidae Miller & Gidley, 1918
                Bathyergomorpha Roberts, 1951
                Bathyergomorphi Thullberg, 1899; McKenna & Bell, 1997

                †Bathyergoididae Lavocat, 1973

                Bathyergidae Waterhouse, 1841
                    Orycteridae Lesson, 1842
                    Bathyergini Winge, 1924
                  including:
                    Georychi Wiegmann, 1832
                    Georychina Gravenhorst, 1843
                    Georychini Brandt, 1855
                    Georrhynchida Haeckel, 1866
                    Georychidae Anonymous, 1897

                    Heterocephalinae Landry, 1957

                    Bathyerginae Waterhouse, 1841
                        Bathyergidae Waterhouse, 1841
                        Bathyerginae Alston, 1876
                        Bathyergini Winge, 1924
                        Bathyerginae Landry, 1957
                        Bathyerginae Waterhouse; McKenna & Bell, 1997
                      including:
                        Georychini Wiegmann, 1832
                        Georychini Brandt, 1855
                        Georychinae Roberts, 1951

            Caviida Bryant & McKenna, 1995
                Caviae Fischer de Waldheim, 1817
                Caviarum Fischer de Waldheim, 1817
                Caviomorpha Carroll, 1988
                Gaviida (lapsus calami)

                Cavioidea Fischer de Waldheim, 1817
                    Sub-ungulata Illiger, 1811
                    Caviae Fischer de Waldheim, 1817
                    Caviarum Fischer de Waldheim, 1817
                    Caviadae Gray, 1821
                    Cavioidea Kraglievich, 1930
                  including:
                    Dinomyoidea Schaub, 1953

                    Agoutidae Gray, 1821
                        Coelogenyidae Gervais, 1849
                        Coelogenina Gervais, 1849
                        Coelogenyidae Burmeister, 1854
                        Cuniculidae Miller & Gidley, 1918
                      including:
                        Dasyporcina Gray, 1825
                        Dasyproctina Bonaparte, 1838
                        Dasyproctidae H. Smith, 1842
                        Dasyproctida Haeckel, 1866
                        †Cephalomyidae Ameghino, 1897

                        Agoutinae Gray, 1821
                            Agoutidae Gray, 1821
                            Coelogenina Gervais, 1849
                            Coelogenyidae Burmeister, 1854
                            Cuniculidae Miller & Gidley, 1918
                            Coelogenyidae Pocock, 1922
                            Cuniculinae Simpson, 1945
                            Agoutinae Hall & Kelson, 1959
                            Agoutinae Gray; McKenna & Bell, 1997

                        Dasyproctinae Gray, 1825
                            Dasyporcina Gray, 1825
                            Dasyproctina Bonaparte, 1838
                            Dasyproctidae H. Smith, 1842
                            Dasyproctini Brandt, 1855
                          including:Cephalomyidae Ameghino, 1897
                            †Cephalomyidae Ameghino, 1897; Kramarz, 2001a

                    †Eocardiidae Ameghino, 1891
                        †Eocardidae Ameghino, 1891
                        †Eocardiidae Ameghino; McKenna & Bell, 1997

                        †Luantinae A.E. Wood & Patterson, 1959
                            †Luantinae A.E. Wood & Patterson, 1959
                            †Luantinae A.E. Wood & Patterson; McKenna & Bell, 1997

                        †Eocardiinae Ameghino, 1891
                            †Eocardidae Ameghino, 1891
                            †Eocardiinae Ameghino; McKenna & Bell, 1997

                    Dinomyidae Peters, 1873
                        Dinomyes Peters, 1873
                        Dinomyina Troschel, 1874
                        Dinomyidae Alston, 1876
                        Dinomyoidea Schaub, 1953
                        Dinomyidae Peters; McKenna & Bell, 1997
                      including:Eumegamyidae Kraglievich, 1926

                        †Eumegamyinae Kraglievich, 1926
                            †Eumegamyidae Kraglievich, 1926
                            †Eumegamyinae Kraglievich, 1932
                            †Eumegamyini Mones, 1981
                            †Eumegamyinae Kraglievich; McKenna & Bell, 1997
                          including:Phoberomyinae Kraglievich, 1931
                            †Tetrastylusinae Kraglievich, 1940

                        †Potamarchinae Kraglievich, 1926
                            †Potamarchidae Kraglievich, 1926
                            †Potamarchinae Simpson, 1945
                            †Potamarchinae Kraglievich; McKenna & Bell,1997

                        Dinomyinae Peters, 1873
                            Dinomyes Peters, 1873
                            Dinomyina Troschel, 1874
                            Dinomyidae Alston, 1876
                            Dinomyinea Schaub, 1953
                            Dinomyini Mones, 1981
                            Dinomyinae Peters; McKenna & Bell, 1997

                    Caviidae Fischer de Waldheim, 1817
                        Caviae Fischer de Waldheim, 1817
                        Caviarum Fischer de Waldheim, 1817
                        Caviadae Gray, 1821
                        Caviina Gray, 1825
                        Caviidae Waterhouse, 1839
                        Caviidae Simpson, 1945
                        Caviidae  Fischer de Waldheim; McKenna & Bell, 1997
                        Gaviidae (lapsus calami)

                        Caviinae Fischer de Waldheim, 1817
                            Caviae Fischer de Waldheim, 1817
                            Caviarum Fischer de Waldheim, 1817
                            Caviadae Gray, 1821
                            Caviina Gray, 1825
                            Caviini Brandt, 1855
                            Caviinae Murray, 1866
                            Caviinae Fischer de Waldheim; McKenna & Bell, 1997

                        Dolichotinae Pocock, 1922

                        †Cardiomyinae Kraglievich, 1930

                    Hydrochoeridae Gray, 1825
                        Hydrocharina Gray, 1825
                        Hydrochoeridae Gill, 1872
                        Hydrochaeridae Cabrera, 1961
                        Hydrochoeridae Gray; McKenna & Bell, 1997
                        Hydrochoeridae Gray; Prado, Cerdeño & Roig-Juñent, 1998

                        †Cardiatheriinae Kraglievich, 1930
                            †Cardiotheriinae Kraglievich, 1930
                            †Cardiotheriinae Simpson, 1945
                            †Cardiotheriinae Kraglievich; McKenna & Bell, 1997

                        †Anatochoerinae Mones & Vucetich, in Mones, 1991

                        Hydrochoerinae Gray, 1825
                            Hydrocharina Gray, 1825
                            Hydrochaerina Bonaparte, 1850
                            Hydrobii Brandt, 1855
                            Hydrochoerinae Weber, 1928
                            Hydrochoerinae Gray; McKenna & Bell, 1997
                          including:Protohydrochoerinae Kraglievich, 1930

                Octodontoidea Waterhouse, 1839
                    Octodontidae Waterhouse, 1839
                    Octodontoidea Simpson, 1945
                    Octodontoidea Waterhouse; McKenna & Bell, 1997
                  ?including:
                    Muriformes Giebel, 1855
                    Muriformidae Ameghino, 1887

                    Octodontidae Waterhouse, 1839
                        Octodontina Waterhouse, 1858
                      including:
                        Psammoryctina Wagner, 1841
                        Psammoryctida Haeckel,1866
                        Ctenomyidae Gervais, 1849
                        Spelacopodidae Lilljeborg, 1866
                        †Paradoxomydae Ameghino, 1889
                        †Acaremyidae A.E. Wood, 1949

                        †Acaremyinae Ameghino, 1902
                            †Acaremyinae Ameghino, 1902
                            †Acaremyidae A.E. Wood, 1949
                            †Acaremyinae Ameghino; McKenna & Bell, 1997
                            †Acaremyidae Ameghino; Guiomar Vucetich & Kramarz, 2003

                        Octodontinae Waterhouse, 1839
                            Octodontidae Waterhouse, 1839
                            Octodontinae Waterhouse; McKenna & Bell, 1997
                            Octodontidae Guiomar Vucetich & Kramarz, 2003
                          including:
                            Psammoryctina Wagner, 1841
                            Psammoryctida Haeckel,1866
                            Ctenomyidae Gervais, 1849
                            Spelacopodidae Lilljeborg, 1866
                            †Paradoximyina Ameghino, 1886
                            †Paradoxomydae Ameghino, 1889

                            Octodontini Waterhouse, 1839
                                Octodontidae Waterhouse, 1839
                                Octodontini Waterhouse; McKenna & Bell, 1997
                              including:
                                Psammoryctina Wagner, 1841
                                Psammoryctida Haeckel,1866
                                Ctenomyidae Gervais, 1849
                                Spelacopodidae Lilljeborg, 1866
                                †Paradoximyina Ameghino, 1886
                                †Paradoxomydae Ameghino, 1889

                             Ctenomyini Lesson, 1842
                                Ctenomysideae Lesson, 1942
                                Ctenomyinae Gervais, 1849
                                Ctenomyinae Lesson; McKenna & Bell, 1997

                    Echimyidae Gray, 1825
                        Echymina Gray, 1825
                        Echimyda Pictet, 1843
                        Echymyidae C.L. Bonaparte, 1850
                        Echimyina Waterhouse, 1858
                        Echimyidae Miller & Gibley. 1918
                        Loncherini Giebel, 1847
                        Loncheridae Burmeister, 1850
                        Echinomyidae Ameghino, 1889

                        Heteropsomyinae Anthony, 1917
                            Heteropsomyinae Anthony; McKenna & Bell, 1997
                          including:
                            Eumysopinae Rusconi, 1935
                            Eumysopinae Patton & Reig, 1989

                        †Adelphomyinae Patterson & Pascual, 1968

                        Myocastorinae Ameghino, 1902
                            Myiopotamyina Bonaparte, 1850
                            Myopotamini Tullberg, 1900
                            Myocastoridae Ameghino, 1902
                            Myocastorinae Patterson & Pascual, 1968
                            Myocastorinae Ameghino; McKenna & Bell, 1997

                        Dactylomyinae Tate, 1935

                        Echimyinae Gray, 1825
                            Echymina Gray, 1825
                            Echymydina C.L. Bonaparte, 1837
                            Echimyinae Murray, 1866
                            Loncherini Giebel, 1847
                            Loncherinae Thomas, 1897
                            Echimyinae Gray; McKenna & Bell, 1997

                    Capromyidae Smith, 1842
                      including:
                        Plagiodontinae Ellerman, 1940
                        †Isolobodontinae Woods, 1989
                        †Hexolobodontinae Woods, 1989

                    †Heptaxodontidae Anthony, 1917
                        †Heptaxodontinae Anthony, 1917
                        †Heptaxodontinae Miller & Gidley, 1918
                        †Heptaxodontinae Anthony; McKenna & Bell, 1997
                      including:Amblyrhizinae Schaub, 1951
                        †Clidomyinae Woods, 1989

                Chinchilloidea Bennett, 1833
                    Chinchillidae Bennett, 1833
                    Chinchilloidea Kraglievich, 1940
                    Eriomyina Van der Hoeven, 1858
                    Chinchilloidea Bennett; McKenna & Bell, 1997

                    Chinchillidae Bennett, 1833
                        Chinchillina Waterhouse, 1858
                        Eriomyidae Burmeister, 1854
                        Eriomyina Van der Hoeven, 1858
                        Chinchillidae Bennett; McKenna & Bell, 1997
                      including:
                        Lagostomi Wiegmann, 1832
                        Lagostomidae Bonaparte, 1838
                        Lagostomida Haeckel, 1866
                        Viscacidae Ameghino, 1904
                        Viscacciidae Rovereto, 1914

                        Lagostominae Wiegmann, 1832
                            Lagostomi Wiegmann, 1832
                            Lagostomina C. L. Bonaparte, 1838
                            Lagostomida Haeckel, 1866
                            Lagostominae Pocock, 1922
                            Lagostominae Wiegmann; McKenna & Bell, 1997

                        Chinchillinae Bennett, 1833
                            Chinchillidae Bennett, 1833
                            Eriomyina Van der Hoeven, 1858
                            Chinchillinae Pocock, 1922
                            Chinchillinae Bennett; McKenna & Bell, 1997
                          including:
                            Viscacidae Ameghino, 1904
                            Viscacciidae Rovereto, 1914

                        †Neoepiblemidae Kraglievich, 1926
                            †Neoepibleminae Simpson, 1945
                            †NeoepiblemidaeKraglievich; McKenna & Bell
                            †Neoepiblemidae Kraglievich; Negri & Ferigolo, 1999
                          including:Perimyidae Landry, 1957

                        Abrocomidae Miller & Gidley, 1918

Reference(s):