(partly) after Hess, Ausich, Brett & Simms, 1999, and Parsley & Zhao, 2006

<==o Blastozoa Sprinkle, 1973
   |?-o †Eocrinoidea Jaekel, 1918 [paraphyletic]
   |  |?- †Balangicystis rotundus Parsley & Zhao, 2006
   |  `--o †Gogiida Broadhead, 1982
   |     |-- †Rhopalocystis Ubaghs, 1963
   |     `--o †Eocrinidae Jaekel, 1918 emend. Parsley & Zhao, 2006 [Sinoeocrinidae Zhao et al., 1994 (pars); Lichenoididae Jaekel, 1918 sensu Zhao et al., 1994 (pars)]
   |        |-- †Acanthocystites Barrande 1887
   |        |-- †Akadocrinus Prokop, 1962
   |        |--o †Gogia Walcott, 1917
   |        |  |-- †G. hobbsi Sprinkle, 1973
   |        |  |-- †G. longidactylus (Walcott, 1886)
   |        |  |-- †G. ojenai Durham, 1919
   |        |  |-- †G. prolifica Walcott, 1917
   |        |  `-- †G. spiralis
   |        |--o †Sinoeocrinus Zhao et al., 1994 [Paragogia Zhao et al., 1994; Curteocrinus Zhao et al., 1994]
   |        |  |-- †S. lui Zhao et al., 1994 [Sinoeocrinus curtobrachiolus Zhao et al., 1994; Sinoeocrinus lepidus Zhao et al., 1994; Sinoeocrinus longus Zhao et al., 1994; Sinoeocrinus minus Zhao et al., 1994; Paragogia globosa Zhao et al., 1994; Curteocrinus guizhouensis Zhao et al., 1994]
   |        |  `?- †“S. globus” Zhao, Huang & Gong, 1999 [nomen nudum]
   |        `-- †Lichenoides Barrande, 1846
   `--o †Blastoidea Sprinkle, 1973
      |?-o †Codaster Wachsmuth and Springer, 1886
      |  |-- †C. osgoodensis (Miller, 1879) [Stephanocrinus osgoodensis Miller, 1879]
      |  |-- †C. pentalobus [Stephanocrinus pentalobus (Hall, 1882)]
      |  `-- †C. pulchellus [Stephanocrinus pulchellus (Miller and Dyer, 1878)]
      |?- †Globoblastus norwoodi
      |?- †Macurdablastus
      |?- †Schizoblastus
      |?- †Cryptoblastus
      |?- †Pyramiblastus
      |?- †Orophocrinus
      |?- †Globoblastus
      |?- †Pentremoblastus [polyphyletic Pentremitidae?]
      |?-+-- †Strongyloblastus
      |  `-- †Pentremites Say, 1820 [polyphyletic Pentremitidae?]
      |?- †Troosticrinus
      |?-o †Ambolostomatidae
      |  `-- †Ambolostoma
      |?-o †Belocrininae
      |  `-- †Belocrinus
      |?-o Troosticrinidae
      |  `--+-- †Metablastus
      |     `--+-- †Calycoblastus [polyphyletic Pentremitidae?]
      |        `-- †Rhopaloblastus [polyphyletic Pentremitidae?]
      `--+-- †Pentremitidea medusae [polyphyletic Pentremitidae?]
         `--+-- †Conuloblastus [polyphyletic Pentremitidae?]
            `--+-- †Devonoblastus [polyphyletic Pentremitidae?]
               |-- †Eleutherocrinus [polyphyletic Pentremitidae?]
               `--o †Hyperoblastidae
                  `--+--o †Hyperoblastus
                     |  `-- †H. reimanni
                     `-- †Petaloblastus

Reference(s):