After Eaton, 1995, and McKenna & Bell, 1997

<==o †Neoplagiaulacinae Ameghino, 1890 sensu McKenna & Bell, 1997 [Neoplagiaulacidae Ameghino, 1890 sensu Kielan-Jaworowska & Hurum, 2001]
   |?- †Mesodma sp.1, cf. M. formosa
   |?- †Mesodma sp.2, cf. M. formosa
   |?- †Mesodma sp.3, cf. M. formosa
   |?- †Mesodma sp.4
   |?- †Mesodma sp.5
   |?- †Mesodma hensleighi
   |?- †Mesodma senecta
   |?- †Mesodma garfieldensis Archibald, 1982
   |?- †M. pygmaea Sloan, 1987
   |--+-- †Mesodma formosa (Marsh, 1889) [Halodon formosus Marsh, 1889??]
   |  `--o †Ectypodus Matthew & Cranger, 1921 [Charlesmooria Kühne, 1969 ]
   |     |?- †E. childei (Kühne, 1969)
   |     |?- †E. simpsoni (Jepsen, 1930)
   |     |?- †E. elaphus Scott, 2005
   |     |-- †E. aphronorus Sloan, 1981
   |     |-- †E. szalayi Sloan, 1981
   |     |-- †E. musculus Matthew & Granger, 1921
   |     `--+-- †E. powelli Jepsen, 1940
   |        `-- †E. tardus (Jepsen, 1930)
   |--+-- †Mesodma primaeva [Perectypodus primaeva]
   |  `--+-- †Mesodma thompsoni Clemens, 1964
   |     |--+-- †Mesodma ambigua Jepsen, 1940 [†Mesodma. sp.4, cf. Mesodma thompsoni??]
   |     |  `-- †Mesodma siberlingi (Simpson, 1935) [Ectypodus?; Mimetodon?]
   |     `--o †Mimetodon Jepsen, 1940
   |        |-- †M. krausei Slaon, 1981
   |        |-- †M.? nanophus (Holtzman, 1978) [Neoplagiaulax nanophus Holtzman, 1978]
   |        |-- †M. trovessortianus
   |        `--+-- †M. churchilli Jepsen, 1940
   |           `-- †M. douglassi
   |--o †Neoplagiaulax Lemoine, 1882
   |  |-- †N. nanophus Holtzman, 1978
   |  |-- †N. nelsoni Sloan, 1987
   |  |-- †N. mckennai Sloan, 1987 [N. mckennaiai Sloan, 1987 (lapsus calami)]
   |  |-- †N. jepi Sloan, 1987
   |  |-- †N. annae Vianey-Liaud, 1986
   |  |-- †N. fractus Dorr, 1952
   |  |-- †N. nicolai Vianey-Liaud, 1986
   |  |-- †N. macintyrei Slaon, 1981
   |  |--+-- †N. hazeni (Jepsen, 1940)
   |  |  `-- †N. sp. cf. N. hazeni Krause, 1977, and Fox, 1990
   |  |-- †N. paskapooensis Scott, 2005 [Neoplagiaulax hunteri Krishtalka, 1973 (in partim); Neoplagiaulax sp. 2 Fox, 1990]
   |  |-- †N. cimolodontoides Scott, 2005 [Neoplagiaulax sp. 3 Fox, 1990]
   |  `--+-- †N. macrotomeus (Wilson, 1956)
   |     |-- †N. copei Lemoine, 1885
   |     |-- †N. eocaenus (Lemoine, 1880) [type]
   |     |-- †N. grangeri (Simpson, 1935)
   |     `?-+-- †N. serrator Scott, 2005 [N. hunteri Krishtalka, 1973 (in partim); N. sp. 1 Fox, 1990]
   |        |-- †N. kremnus Johnston & Fox, 1984
   |        |-- †N. sp. cf. N. hunteri (Simpson, 1936) [Blindman River localities??]
   |        `-- †N. hunteri (Simpson, 1936)
   |--o †Parectypodus Jepsen, 1930
   |  |?- †P. lovei Sloan, 1966
   |  |?- †P. vanvaleni Sloan, 1981
   |  |-- †P. corystes Scott, 2003
   |  |-- †P. sloani Schiebout, 1974
   |  |-- †P. trovessartianus (Cope, 1882) ["P. trouessarti"; Ptilodus; Mimetodon; Neoplagiaulax]
   |  |-- †P. sylviae (Rigsby, 1980) [Ectypodus sylviae Rigby, 1980 ]
   |  |-- †P. pattersoni Sloan, 1987
   |  |-- †P. armstrongi Johnston & Fox, 1984
   |  |-- †P. sinclairi (Simpson, 1935)
   |  `--+-- †P. laytoni Jepsen, 1940
   |     `-- †P. simpsoni
   |--o †Carnaysia Vianey-Liaud, 1986
   |  |-- †C. manueli Vianey-Liaud, 1986
   |  `-- †C. davidi Vianey-Liaud, 1986
   |--o †Krauseia Vianey-Liaud, 1986
   |  `-- †K. clemensi (Sloan, 1981) [Parectypodus clemensi Sloan, 1981]
   |-- †Xironomys swainae Rigby, 1980 [Xyronomys; ?Eucosmodontidae]
   |-- †Xancolomys mcgrewi Rigby, 1980
   `-- †Mesodmops Tong & Wang, 1994

Reference(s):

 

Special thanks to:

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