After Watabe, Tsubamoto & Tsogtbaatar, 2007 (fig. 8b)

<==o †Tritylodontidae Cope, 1884 [Bainotheriidae Young, 1940]
   |?- †Montirictus kuwajimaensis Matsuoka, Kusuhashi & Corfe, 2016
   |?-+-- †Yuanotherium minor Hu, Meng & Clark, 2009
   |  |-- †Shartegodon altai Velazco, Buczek & Novacek, 2017; L.Jur. EAs.
   |  `-- †Nuurtherium baruunensis Velazco, Buczek & Novacek, 2017; L.Jur. EAs.
   |--o †Oligokyphus Hennig, 1922 [Chalepotherium; Mucrotherium von Huene, 1933; Uniserium von Huene, 1933]
   |  |?- †O. plieningeri (Ameghino, 1903) [Chalepotherium plieningeri (Ameghino, 1903)]
   |  |-- †O. triserialis Hennig, 1922 [Mucrotherium cingulatum von Huene, 1933; Uniserium von Huene, 1933]
   |  |-- †O. lufengensis Luo & Sun, 1993
   |  |-- †O. sp. [Jenkins, Crompton & Downs, 1983] [USA: Arizona: Kayenta For.]
   |  |-- †O. major Kühne, 1956
   |  `-- †O. minor Kühne, 1956
   `--+--o †Tritylodon [?Triglyphus; Likhoelia Ginsburg, 1961; Tritylodontoideus Fourie, 1962]
      |  |?- †T. fraasi Lydekker, 1887 [“Triglyphus (Fraas, 1866) fraasi” Lydekker, ?1887-90]
      |  |-- †T. longaevus Owen, 1884 [Likhoelia ellenbergi Ginsburg, 1961]
      |  `-- †T. maximus (Fourie, 1962) [Tritylodontoideus maximus Fourie, 1962]
      `--+-- †Diazhongia longirostrata Cui, 1981 [= Lufengia delicata Chow & Hu, 1959??]
         |--o †Lufengia Chow & Hu, 1959
         |  |-- †L. minor (Young, 1947) [= Bienotherium minor Young, 1947]
         |  `-- †L. delicata Chow & Hu, 1959 [= Diazhongia longirostrata Cui, 1981??]
         `--+--+-- †Kayentatherium wellesi (Kermack, 1982) [Nearctylodon broomi Lewis, 1986; Kayentotherium] 
            |  `--o †Bienotherium Young, 1940
            |     |-- †B. yunnanense Young, 1940 [incl. Bienotherium elegans Young, 1947]
            |     |-- †B. minor Young, 1947 [= Lufengia minor (Young, 1947)??]
            |     `-- †B. magnum Chow, 1962
            `--+--+-- †Dinnebitodon amarali Sues, 1986a
               |  `-- †Yunnanodon brevirostre Cui, 1976 [Yunnania?]
               `--+--o †Bienotheroides Young, 1982; M.-U.Jur. CAs.
                  |  |-- †B. shartagensis Watabe, Tsubamoto & Tsogtbaatar, 2007, L.Jur. EAs.
                  |  |-- †B. ultimus Maisch, Matzke & Sun, 2004; L.Jur. CAs.
                  |  |-- †B. wanshienensis Young, 1982 [B. wanxienensis; B. wanhsienensis (lapsus calami)]
                  |  `-- †B. zigongensis Sun, 1986
                  `--+-- †Bocatherium mexicanum Clark & Hopson, 1985
                     |-- †Polistodon chuannanensis He & Cai, 1984
                     |-- †Stereognathus ooliticus Charlesworth, 1855; M.Jur. WEu.
                     `-- †Xenocretosuchus sibiricus Tatarinov & Matchenko, 1999; E.Cret. CAs.

After Velazco, Buczek & Novacek, 2017

<==o †Tritylodontidae
   |-- †Oligokyphus
   `--+-- †Tritylodon
      `--+-- †Bienotherium
         `--+-- †Kayentatherium
            `--+-- †Bienotheroides
               |-- †Montirictus
               |-- †Polistodon
               |-- †Xenocretosuchus
               |--+-- †Lufengia
               |  `--+-- †Diazhongia
               |     |-- †Dinnebitodon
               |     `-- †Yunnanodon
               |--+-- †Yuanotherium
               |  |-- †Shartegodon
               |  `-- †Nuurtherium
               `--+-- †Bocatherium
                  `-- †Stereognathus

Reference(s):

  • Velazco, P. M., Buczek, A. J. & Novacek, M. J., 2017: Two New Tritylodontids (Synapsida, Cynodontia, Mammaliamorpha) from the Upper Jurassic, Southwestern Mongolia.
    –American Museum Novitates: Vol. #3874, pp. (1-35) [doi: 10.1206/3874.1]

Reference(s):

Special thanks to:

Jos H. M. Dols, for gathering additional information and species of these animals.