Familia and genera from Wikipedia
<==o Ceriantharia [Ceriantipatharia in partim] (Tube-dwelling anemones) |--o Penicilaria | `--o Arachnactidae McMurrich, 1910 | |-- Anactinia Annandale, 1909 | |-- Arachnactis Sars, 1846 | |-- Arachnanthus Carlgren, 1912 | |-- Dactylactis van Beneden, 1897 | |-- Isapiactis Carlgren, 1924 | |-- Isarachnactis Carlgren, 1924 | |-- Isarachnanthus Carlgren, 1924 | |-- Isovactis | |-- Ovactis | `-- Paranactinia `--o Spirularia |--o Botrucnidiferidae Carlgren, 1912 | |-- Angianthula Leloup, 1964 | |-- Atractanthula Leloup, 1964 | |-- Botracnidifer | |-- Botruanthus | |-- Botrucnidiata Leloup, 1932 | |-- Botrucnidifer | |-- Calpanthula | |-- Cerianthula Beneden, 1898 | |-- Gymnanthula Leloup, 1964 | |-- Hensenanthula | |-- Ovanthula | `-- Sphaeranthula `--o Cerianthidae Milne-Edwards & Haime, 1852 |-- Anthoactis Leloup, 1932 |-- Apiactis Beneden, 1898 |-- Bursanthus |-- Ceriantheomorphe |-- Ceriantheopsis Carlgren, 1912 |-- Cerianthus Delle Chiaje, 1830 |-- Engodactylactis |-- Isodactylactis |-- Nautanthus |-- Pachycerianthus Roule, 1904 |-- Paradactylactis |-- Parovactis |-- Peponactis |-- Plesiodactylactis |-- Sacculactis |-- Solasteractis |-- Synarachnactis Carlgren, 1924 |-- Syndactylactis `-- Trichactis
Reference(s):
- Anonymous, 2013: Ceriantharia [last updated: 2013-04-13]
–Wikipedia - The Free Encyclopedia: http://en.wikipedia.org/wiki/Ceriantharia [last visited: 2014-02-15]