Acontiaria Stephenson, 1935 (basis of record)
Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Actinia coccinea Müller, 1776 accepted as Stomphia coccinea (Müller, 1776) (source of synonymy)
Actinia dianthus Ellis, 1768 accepted as Metridium dianthus (Ellis, 1768) (basis of record)
Actinia digitata Müller, 1776 accepted as Hormathia digitata (O.F. Müller, 1776) (basis of record)
Actinia elegans Dalyell, 1848 accepted as Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (basis of record)
Actinia equina (Linnaeus, 1758) (additional source)
Actinia lacerata Dalyell, 1848 accepted as Sagartiogeton laceratus (Dalyell, 1848) accepted as Sagartia lacerata (Dalyell, 1848) (basis of record)
Actinia parasitica Couch, 1842 accepted as Calliactis parasitica (Couch, 1842) (basis of record)
Actinia pedunculata Pennant, 1777 accepted as Cereus pedunculatus (Pennant, 1777) (basis of record)
Actinia troglodytes Price in Johnston, 1847 accepted as Sagartia troglodytes (Price in Johnston, 1847) accepted as Cylista troglodytes (Price in Johnston, 1847) (basis of record)
Actinia undata Müller, 1778 accepted as Sagartiogeton undatus (Müller, 1778) accepted as Cylista undata (Müller, 1778) accepted as Sagartia undata (Müller, 1778) (basis of record)
Actiniaria (additional source)
Actinioidea Rafinesque, 1815 (basis of record)
Actinothoe sphyrodeta (Gosse, 1858) (additional source)
Athenaria (basis of record)
Calliactis parasitica (Couch, 1842) (additional source)
Cereus pedunculatus (Pennant, 1777) (additional source)
Ceriantharia (additional source)
Cerianthidae Milne Edwards & Haime, 1851 (additional source)
Cylista Wright, 1859 (basis of record)
Cylista troglodytes (Price in Johnston, 1847) (basis of record)
Cylista undata (Müller, 1778) accepted as Sagartia undata (Müller, 1778) (basis of record)
Diadumene cincta Stephenson, 1925 (additional source)
Diadumene lineata (Verrill, 1869) (basis of record)
Edwardsia timida Quatrefages, 1842 (additional source)
Endomyaria Stephenson, 1921 (basis of record)
Hexacorallia (additional source)
Hormathia digitata (O.F. Müller, 1776) (additional source)
Mesomyaria Stephenson, 1921 accepted as Actinostoloidea Carlgren, 1932 (basis of record)
Metridioidea Carlgren, 1893 (basis of record)
Metridium dianthus (Ellis, 1768) (basis of record)
Metridium senile (Linnaeus, 1761) (additional source)
Priapus equinus Linnaeus, 1758 accepted as Actinia equina (Linnaeus, 1758) (basis of record)
Priapus felinus Linnaeus, 1761 accepted as Urticina felina (Linnaeus, 1761) (basis of record)
Priapus senilis Linnaeus, 1761 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia lacerata (Dalyell, 1848) (basis of record)
Sagartia lineata Verrill, 1869 accepted as Diadumene lineata (Verrill, 1869) (basis of record)
Sagartia sphyrodeta Gosse, 1858 accepted as Actinothoe sphyrodeta (Gosse, 1858) (basis of record)
Sagartia troglodytes (Price in Johnston, 1847) accepted as Cylista troglodytes (Price in Johnston, 1847) (additional source)
Sagartia undata (Müller, 1778) (basis of record)
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)
Spirularia (basis of record)
Stomphia coccinea (Müller, 1776) (additional source)
Synarachnactis Carlgren, 1924 (basis of record)
Thenaria (basis of record)
Urticina felina (Linnaeus, 1761) (additional source)