After Ruta, 1999, and Lee, Lefebvre & Choi, 2005

<==o †Cornuta Jaekel, 1901 (cornutes)
   |?- †Cornuta genus et species indet. A (Lee, Lefebvre & Choi, 2005)
   |?- †Cornuta genus et species indet. A (Lee, Lefebvre & Choi, 2005)
   |?- †Babinocystis
   |?- †Beryllia
   |?- †Bohemiaecystis
   |?- †Ceratocystis
   |?- †Chauvelia discoidalis Cribbs, 1990
   |?- †Cothurnocystisbifida
   |?- †Domfrontia
   |?- †Hanusia
   |?- †Lobocarpus
   |?- †Milonicystis
   |?- †Nanocarpus
   |?- †Nevadaecystis
   |?- †Ovocarpus moncereti Ubachs, 1994
   |?- †Procothurnocystis
   |?- †Progalliaecystis
   |?- †Prokopicystis
   |?- †Protocystites
   |?- †Reticulocarpos
   |?- †Thoralicystis
   |?- †Ceratocystis Jaekel, 1901
   |?- †Acuticarpus? republicensis
   |?-o †Amygdalothecidae
   |  `--o †Amygdalotheca Ubachs, 1969
   |     `-- †A. griffei
   |?-o †Hanusiidae
   |  |-- †Drepanocarpos Smith & Jell, 1999
   |  `-- †Galliaecystis Ubachs, 1969
   `--o †Cothurnocystidae Bather, 1913
      |?-o †Acuticarpus Sumrall, Sprinkle & Guensburg, 1997
      |  |-- †A. delticus Sumrall, Sprinkle & Guensburg, 1997
      |  `-- †A. republicensis Sumrall, Sprinkle & Guensburg, 1997
      |?-o †Archaeocothurnus Sumrall, Sprinkle & Guensburg, 1997
      |  |-- †A. bifida (Ubaghs & Robison, 1988) [Cothurnocystis bifida Ubaghs & Robison, 1988]
      |  `-- †A. goshutensis Sumrall, Sprinkle & Guensburg, 1997
      |?- †Ponticulocarpus robisoni Sumrall & Sprinkle, 1999
      |?-o †Cothurnocystinae
      |  `--o †Cothurnocystis Bather, 1913
      |     `-- †C. fellinensis Ubachs, 1969
      |?-o †Phyllocystinae
      |  |-- †Proscotiaecystis melchiori (Ubachs, 1983) Ubaghs, 1994
      |  `-- †Phyllocystis blayaci Thoral, 1935
      |?-o †Scotiaecystinae
      |  `-- †Scotiaecystis
      `--o †Chauvelicystinae Daley, 1992
         |?- †Ampelocarpus Lefebvre & Vizcaino, 1999
         |-- †Flabellicarpus rushtoni (Marí Mus, 2002) Marí Mus, 2003 [Flabellicystis rushtoni Marí Mus, 2002 (preoccupied)]
         |-- †Chauvelicystis ubachsi (Chauvel, 1966)
         |-- †Chauvelicystis vizcainoi Dalay, 1992
         `--+-- †Chauvelicystis spinosa Ubachs, 1969
            |-- †Milonicystis kerfornei Chauvel, 1986
            `--+-- †Prochauvelicystis semispinosa Daley, 1992
               `--+-- †Sokkaejaecystis serrata Lee, Lefebvre & Choi, 2005
                  `--+-- †Ampelocarpus landeyranensis Lefebvre & Vizcaïno, 1999
                     `-- †Lyricocarpus courtessolei Ubachs, 1994

Reference(s):