After Parker, 1982

<==o Alcyonaria [=? Octocorallia]
   |--o Protoalcyonaria Hickson, 1894
   |  |-- Haimeidae Wright, 1865
Haimeia - Hartea
   |  `-- Taiaroidae
   |--o Stolonifera
   |  |-- Clavulariidae
   |  |-- Cornulariidae
   |  `-- Tubiporidae
   |--o Telestacea
   |  |-- Coelogorgiidae
   |  |-- Pseudocladochonidae
   |  `-- Telestidae
   |--o Gastraxonacea
   |  `-- Pseudogorgiidae
   |--o Gorgonacea (sarveiskorallit)
   |  |--o Holaxonia
   |  |  |-- Acanthogorgiidae
   |  |  |-- Ainigmaptilidae
   |  |  |-- Chrysogorgiidae
   |  |  |-- Ellisellidae
   |  |  |-- Gorgoniidae
   |  |  |-- Ifalukellidae
   |  |  |-- Isididae
   |  |  |-- Keroeididae
   |  |  |-- Paramuriceidae
   |  |  |-- Plexauridae
   |  |  `-- Primnoidae
   |  `--o Scleraxonia
   |     |-- Anthothelidae
   |     |-- Briareidae
   |     |-- Coralliidae
   |     |-- Melithaeidae
   |     |-- Paragorgiidae
   |     |-- Parisididae
   |     `-- Subergorgiidae
   |--o Alcyonacea [Alcyoniina]
   |  |-- Alcyoniidae
   |  |-- Astrospiculariidae
   |  |-- Maasellidae
   |  |-- Nephtheidae
   |  |-- Siphonogorgiidae
   |  `-- Xeniidae (xeniat)
   |?- Pennatulacea (merisulat)
   `--o Helioporacea
      |-- Helioporidae
      `-- Lithotelestidae

Reference(s):