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

<==o †Homalozoa
   |?- †Ctenocystoidea
   |?- †Homostelea
   |?- †Homoiostelea
   `--o †Stylophora Gill & Caster, 1960 [Calcichordata; Caroidea] [incl.? Ankyroida]
      |?- †Aspidocarpus bohemicus Ubaghs, 1979
      |?- †Chauvelia discoidalis Cribbs, 1990
      |?- †Ovocarpus moncereti Ubachs, 1994
      |?- †Reticulocarpos
      |?- †Amygdalotheca
      |?- †Domfrontia
      |?- †Prokopicystis
      |?- †Nanocarpus
      |--o †Ceratocystis Jaekel, 1901
      |  `-- †C. perneri
      |--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)
      |  |?- †Acuticarpus? republicensis
      |  |?-o †Amygdalothecidae
      |  |  `--o †Amygdalotheca Ubachs, 1969
      |  |     `-- †A. griffei
      |  |?-o †Hanusiidae
      |  |  |-- †Drepanocarpos Smith & Jell, 1999
      |  |  `-- †Galliaecystis Ubachs, 1969
      |  `--o †Cothurnocystidae Bather, 1913
      |     |?- †Archaeocothurnus Sumrall, 1997
      |     |?- †Ponticulocarpus Sumrall & Sprinkle, 1999
      |     |?-o †Cothurnocystinae
      |     |  `--o †Cothurnocystis Bather, 1913
      |     |     `-- †C. fellinensis Ubachs, 1969
      |     |?-o †Phyllocystinae
      |     |  |-- †Proscotiaecystis melchiori (Ubachs, 1983)
      |     |  `-- †Phyllocystis blayaci Thoral, 1935
      |     |?-o †Scotiaecystinae
      |     |  `-- †Scotiaecystis
      |     `--o †Chauvelicystinae Daley, 1992
      |        |-- †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
      |?-o †Lagynocystidae
      |  `-- †Lagynocystis pyramidalis
      |?-o †Peltocystidae
      |  `-- †Peltocystis cornuta
      `?-o †Mitrata (mitrates)
         |?- †Lobocarpus Ubachs, 1998
         `?-o †Mitrocystidae
            |-- †Mitrocystides mitra Barrande, 1887
            |-- †Eomitrocystella savilli Beisswenger, 1994
            `--+--o †Mitrocystella
               |  |-- †M. incipiens
               |  `-- †M. abarrandei
               `--o †Anomalocystidae sensu Ruta, 1999 [Fig. 13b]
                  |-- †Barrandeocarpus jaekeli Ubaghs, 1979; U. Dev. WEu.
                  `--+-- †Kierocystis incerta Parsley, 1991; U. Dev. ENA.
                     `--+-- †Barrandeocarpus norvegicus Craske & Jefferies, 1989; U. Dev. WEu.
                        `--+-- †Ateleocystites guttenbergensis Kolata & Jollie, 1982; U. Dev. CNA.
                           `--+--+-- †Kopficystis kirkfieldi Parsley, 1991; U. Dev. ENA.
                              |  `--+-- †Willmanocystis denticulata Kolata & Jollie, 1982; U. Dev. Aust.
                              |     `--+-- †Anomalocystis cornutus Hall, 1858; L. Dev. ENA.
                              |        `--+-- †Bokkeveldia oosthuizeni Ruta & Theron, 1997; L. Dev. SAf.
                              |           `--+-- †Mongolocarpos minzhini Rozhnov, 1990; U. Dev. CAs.
                              |              `--+-- †Placocystites forbesianus de Koninck, 1869; U. Dev. WEu.
                              |                 `--+-- †Rhenocystis latipedunculata Dehm, 1932; L. Dev. CEu.
                              |                    `-- †Victoriacystis wilkinsi Gill & Caster, 1960; U. Dev. Aust.
                              `--+-- †Diamphidiocystis drepanon Kolata & Guensburg, 1979; U. Dev. ENA.
                                 `--+-- †Enoploura popei Gaster, 1952; U. Dev. ENA.
                                    `--+-- †Occultocystis koeneni Haude, 1995; L. Dev. SSA.
                                       `--+-- †Notocarpos garratti Philip, 1981; U. Dev. Aust.
                                          `--+-- †Tasmanicytidium burretti Gaster, 1983; U. Dev. Aust.
                                             `--+-- †Placocystella africana (Reed, 1925) L. Dev. SAf.
                                                `--+-- †Allenicytidium flemingi Gaster & Gill, 1968; L. Dev. NZ.
                                                   `-- †Australocystis langei Caster, 1954; L. Dev. ESA.

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