<==o †Herpetotheriidae Trouessant, 1879 [Didelphidae: Herpetotheriinae Trouessant, 1879 sensu McKenna & Bell, 1997]
   |?- †Herpetotheriidae gen. et sp. indet. [Kappelman, Maas, Sen, Alpagut, Fortelius & Lunkka, 1996] [Eocene, Anatolia]
   |?- †Herpetotheriidae gen. et sp. indet. [Thewissen, Williams & Hussain, 2001] [Eocene, Indo-Pakistan]
   |?-o †Amphiperatherium Filhol, 1879 [Oxygomphius von Meyer, 1846; Microtarsioides Weigelt, 1933; Ceciliolemur Weigelt, 1933]
   |  |-- †A. minutum
   |  `-- †A. frequens
   |?-o †Asiadidelphis Gabunia, Shevyreva & Gabunia, 1990; Olig. CAs.
   |  |-- †A. zaissanensse Gabunia, Shevyreva & Gabunia, 1990
   |  `-- †A. tjutkovae Emry, Lucas, Szalay & Tleuberdina, 1995
   |?- †Garadelphys [Geratherium Crochet, 1984]
   |?- †Entomacodon Marsh, 1872 [Centracodon, Marsh, 1872]
   |?- †Maastrichtidelphys meurismeti Martin, Case, Jagt, Schulp & Mulder, 2005; U.Cret. WEu.
   |-- †Swaindelphys cifelli Johanson, 1996
   |-- †Esteslestes ensis Novacek, Ferrusquia-Villafranca, Flynn, J., Wyss & Norell, 1991
   |--o †Nortedelphys Case, Goin & Woodburne, 2005 [Alphadon Lillegraven, 1969 (in partim)]; U.Cret. SWNA.
   |  |-- †N. magnus Case, Goin & Woodburne, 2005 [Alphadon marshi Lillegraven, 1969 (in partim)]
   |  |-- †N. intermedius Case, Goin & Woodburne, 2005
   |  `-- †N. minimus Case, Goin & Woodburne, 2005
   `--+--+-- Notometatheria?
      |  `--o †Herpetotherium Cope, 1873; E. Ter. NA.
      |     |?- †H. sp.
      |     |?- †H. sp. cf. H. knighti
      |     |?- †H. sp. cf. H. marsupium
      |     |?- †H. sp. cf. H. marsupium
      |     |-- †H. valens (Lambe, 1908)
      |     |-- †H. marsupium Troxell, 1923 [Peratherium marsupium (Troxell, 1923)]
      |     |-- †H. knighti (Macgrew, 1959) [Peratherium knighti Macgrew, 1959]
      |     `--+-- H. merriami 
      |        `--+-- H. fugax
      |           `-- H. youngi
      |--o †Copedelphys Korth, 1994
      |  |?- †C. sp. cf. C. titanelix
      |  |?- †C. sp. cf. C. innominata
      |  |?- †C. sp. cf. C. stevensoni
      |  |-- †C. innominata (Simpson, 1928)
      |  |-- †C. titanelix
      |  `-- †C. stevensoni
      `--o †Peratherium Aymard, 1850 [†Alacodon Quinet, 1964; †Qatranitherium Crochet, Thomas, Sen, Roger, Gheerbrant & Al-Sulaimani, 1992; †Quatranitherium Szalay, 1994; †Peratotherium (lapsus calami?)]
         |?- †P.? sp.
         |?- †P. scalare [†Herpetotherium scalare]
         |?- †P. marginale [†Herpetotherium marginale]
         |?- †P. huntii [†Herpetotherium huntii]
         |-- †P. comstocki
         |-- †P. edwardi
         |-- †P. lavergnensis
         |-- †P. elegans
         `?- †P. innominatum (Simpson, 1928) [=? Copedelphys innominata (Simpson, 1928)]

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