Familia and genera from Wikipedia

<==o Zoanthidea [Zoanthiniaria; Zoantharia de Blainville, 1830] (zoanthids; kukkakorallit)
   |-- Abyssoanthus Reimer & Fujiwara, in Reimer, Sinniger, Fujiwara, Hirano & Maruyama, 2007 [Abyssoanthidae]
   |-- Epizoanthus Gray, 1867 [Epizoanthidae]
   |--o Hydrozoanthidae
   |  |-- Hydrozoanthus Sinniger, Reimer & Pawlowski, 2010
   |  `-- Terrazoanthus Reimer & Fujii, 2010
   |?- Neozoanthus [Neozoanthidae]
   |?- Paleaozoanthus
   |--o Parazoanthidae
   |  |-- Antipathozoanthus Sinniger, Reimer & Pawlowski, 2010
   |  |-- Corallizoanthus Reimer, in Reimer Nonaka, Sinniger & Iwase, 2008
   |  |-- Isozoanthus Carlgren, 1905
   |  |-- Mesozoanthus Sinniger & Haussermann, 2009
   |  |-- Parazoanthus Haddon & Shackleton, 1891
   |  `-- Savalia Nardo, 1814 [Gerardia]
   |--o Sphenopidae
   |  |-- Palythoa Lamouroux, 1816
   |  `-- Sphenopus
   `--o Zoanthidae
      |-- Acrozoanthus
      |-- Isaurus Gray, 1828
      `-- Zoanthus Cuvier, 1800

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