After McKenna & Bell, 1997, Cooke, 2000, Schwartz & Megirian, 2004, and Prideaux, 2004

<==o †Sthenurinae Glauert, 1926 [taxonomic history]
   |--o †Hadronomas Woodburne, 1967 [†Hadronomus; †Aladronomas] [Hadronomini (not recognized by Prideaux)]
   |  |-- †H. sp. [Prideaux, 2004]
   |  `-- †H. puckridgi Woodburne, 1967
   `--o †Sthenurini Szalay, 1994 [not recognized by Prideaux]
      |?- †Eosthenurus [not recognized by Prideaux]
      |--o †Sthenurus Owen, 1874a [incl.? †Simosthenurus Tedford, 1966]
      |  |-- †S. andersoni Marcus, 1962
      |  `--+-- †S. atlas (Owen, 1838)
      |     |-- †S. murrayi Prideaux, 2004
      |     |-- †S. notabilis Bartholomai, 1963
      |     `--+-- †S. stirlingi Wells & Tedford, 1995
      |        |-- †S. tindalei Tedford, 1966
      |        `-- †S. sp. cf. S. tindalei [Prideaux, 2004]
      `--+-- †Metasthenurus newtonae (Prideaux, 2000) Prideaux, 2004
         `--o †Simosthenurini Prideaux, 2004
            |--o †Archaeosimos Prideaux, 2004
            |  |-- †A. cegsai (Pledge, 1992) [†Simosthenurus cegsai Pledge, 1992; †Procoptodon cegsai (Pledge, 1992)]
            |  |-- †A. correllii Prideaux, 2004
            |  `?- cf. †A. sp. [Prideaux, 2004]
            `--+-- †“Simosthenurusbrachyselenis Prideaux & Wells, 1997
               |-- †“Simosthenurustirarensis Prideaux, 2004
               `--+--+-- †“Simosthenurusbaileyi Prideaux & Wells, 1998
                  |  |?- †“Simosthenurus” sp. cf. baileyi (Prideaux, 2004)
                  |  `--+-- †“Simosthenurusantiquus (Bartholomai, 1963)
                  |     |?- †“Simosthenurus” sp. cf. “P.antiquus [Prideaux, 2004]
                  |     `-- †“Simosthenuruspales (De Vis, 1895) [Sthenurus pales]
                  `--+--o †Simosthenurus Tedford, 1966 [Sthenurus Owen, 1874a (in partim)]
                     |  |-- †S. euryskaphus Prideaux & Well, 1997
                     |  `--+-- †S. occidentalis Glauert, 1910
                     |     |-- †S. sp. cf. S. occidentalis [Prideaux, 2004]
                     |     `--o †S. maddocki Flannery & Hope, 1984 [†Procoptodon maddocki (Flannery & Hope, 1984)]
                     |        |-- †S. m. maddocki Flannery & Hope, 1984 [†Procoptodon maddocki maddocki (Flannery & Hope, 1984)]
                     |        `-- †S. m. nullarborensis Prideaux, 1994 [†Procoptodon maddocki nullarborensis (Prideaux, 1994)]
                     `--+-- †“Procoptodonbrowneorum (Merrilees, 1968a) [Sthenurus brownei Merrilees, 1968a (non 1970)]
                        `--+-- †“Procoptodongilli (Merrilees, 1968a) [non 1970]
                           `--+-- †“Procoptodonmccoyi (Turnbull, Lundelius & Tedford, 1992) [†Simosthenurus mccoyi Turnbull, Lundelius & Tedford, 1992]
                              `--+-- †“Procoptodonoreas (De Vis, 1895)
                                 `--+-- †“Procoptodonwilliamsi Prideaux, 2004
                                    `--o †Procoptodon Owen, 1874b [†Pachysiagon Owen, 1874; †Simosthenurus Tedford, 1966]
                                       |?- †P. texasensis [not recognized by Prideaux]
                                       |-- †P. pusio Owen, 1874b [non Flannery, 1983]
                                       `--+-- †P. goliath (Owen, 1845a)
                                          `-- †P. rapha Owen, 1874b

Reference(s):

 

Special thanks to:

Jos H. M. Dols, for gathering additional information and missing species.