Acontiaria Stephenson, 1935 (additional source)
Actinia equina (Linnaeus, 1758) (additional source)
Actiniaria (additional source)
Actiniidae Rafinesque, 1815 (additional source)
Actinostolidae Carlgren, 1932 (additional source)
Actinothoe Fischer, 1889 (additional source)
Actinothoe sphyrodeta (Gosse, 1858) (additional source)
Athenaria (additional source)
Calliactis Verrill, 1869 (additional source)
Calliactis parasitica (Couch, 1842) (additional source)
Cereus pedunculatus (Pennant, 1777) (additional source)
Diadumene Stephenson, 1920 (additional source)
Diadumene cincta Stephenson, 1925 (additional source)
Diadumenidae Stephenson, 1920 (additional source)
Edwardsia timida Quatrefages, 1842 (additional source)
Endomyaria Stephenson, 1921 (additional source)
Hormathia Gosse, 1859 (additional source)
Hormathia digitata (O.F. Müller, 1776) (additional source)
Hormathiidae Carlgren, 1932 (additional source)
Mesomyaria Stephenson, 1921 accepted as Actinostoloidea Carlgren, 1932 (additional source)
Metridiidae Carlgren, 1893 (additional source)
Metridium de Blainville, 1824 (additional source)
Metridium senile (Linnaeus, 1761) (additional source)
Nynantheae accepted as Enthemonae (additional source)
Sagartia Gosse, 1855 (additional source)
Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia troglodytes (Price in Johnston, 1847) accepted as Cylista troglodytes (Price in Johnston, 1847) (additional source)
Sagartiidae Gosse, 1858 (additional source)
Sagartiogeton Carlgren, 1924 (additional source)
Sagartiogeton laceratus (Dalyell, 1848) accepted as Sagartia lacerata (Dalyell, 1848) (additional source)
Sagartiogeton undatus (Müller, 1778) accepted as Cylista undata (Müller, 1778) accepted as Sagartia undata (Müller, 1778) (additional source)
Stomphia (Gosse, 1859) (additional source)
Stomphia coccinea (Müller, 1776) (additional source)
Thenaria (additional source)