Acontiaria Stephenson, 1935 (additional source)
Actinauge Verrill, 1883 (additional source)
Actinauge longicornis (Verrill, 1882) (additional source)
Actinauge verrillii McMurrich, 1893 (additional source)
Actinernidae Stephenson, 1922 (additional source)
Actinernus Verrill, 1879 (additional source)
Actinernus nobilis Verrill, 1879 (additional source)
Actiniaria (additional source)
Actiniidae Rafinesque, 1815 (additional source)
Actinostola Verrill, 1883 (additional source)
Actinostola callosa (Verrill, 1882) (additional source)
Actinostola groenlandica Carlgren, 1899 (additional source)
Actinostola spetsbergensis Carlgren, 1893 accepted as Glandulactis spetsbergensis (Carlgren, 1893) (additional source)
Actinostolidae Carlgren, 1932 (additional source)
Actinothoe Fischer, 1889 (additional source)
Actinothoe modesta (Verrill, 1866) (additional source)
Adamsia sociabilis Verrill, 1882 accepted as Calliactis sociabilis (Verrill, 1882) (additional source)
Allantactis Danielssen, 1890 (additional source)
Allantactis parasitica Danielssen, 1890 (additional source)
Amphianthus mirabilis (Verrill, 1879) (additional source)
Antholoba Hertwig, 1882 (additional source)
Antholoba achates (Drayton in Dana, 1846) (additional source)
Antholoba perdix (Verrill, 1882) (additional source)
Athenaria (additional source)
Bolocera Gosse, 1860 (additional source)
Bolocera tuediae (Johnston, 1832) (additional source)
Bunodactis Verrill, 1899 (additional source)
Bunodactis stella (Verrill, 1864) accepted as Aulactinia stella (Verrill, 1864) (additional source)
Calliactis Verrill, 1869 (additional source)
Diadumene Stephenson, 1920 (additional source)
Diadumene leucolena (Verrill, 1866) (additional source)
Diadumenidae Stephenson, 1920 (additional source)
Drillactis Verrill, 1922 (additional source)
Drillactis pallida (Verrill, 1880) (additional source)
Edwardsia elegans Verrill, 1869 (additional source)
Edwardsia sipunculoides (Stimpson, 1853) (additional source)
Endocoelantheae accepted as Actinernoidea Stephenson, 1922 (additional source)
Endomyaria Stephenson, 1921 (additional source)
Epiactis Verrill, 1869 (additional source)
Epiactis fecunda (Verrill, 1899) accepted as Urticina fecunda (Verrill, 1899) (additional source)
Gonactinia Sars, 1851 (additional source)
Gonactinia prolifera (Sars, 1835) (additional source)
Gonactiniidae Carlgren, 1893 (additional source)
Halcampa Gosse, 1858 (additional source)
Halcampa arctica Carlgren, 1893 (additional source)
Halcampa duodecimcirrata (Sars, 1851) (additional source)
Halcampidae Andres, 1883 (additional source)
Haloclava Verrill, 1899 (additional source)
Haloclava producta (Stimpson, 1856) (additional source)
Haloclavidae Verrill, 1899 (additional source)
Hormathia Gosse, 1859 (additional source)
Hormathia digitata (O.F. Müller, 1776) (additional source)
Hormathia nodosa (Fabricius, 1780) (additional source)
Hormathiidae Carlgren, 1932 (additional source)
Liponema Hertwig, 1882 (additional source)
Liponema multicornis (Verrill, 1880) accepted as Liponema multicorne (Verrill, 1880) (additional source)
Mesacmaea Andres, 1883 (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)
Nematostella Stephenson, 1935 (additional source)
Nematostella vectensis Stephenson, 1935 (additional source)
Nynantheae accepted as Enthemonae (additional source)
Paracalliactis Carlgren, 1928 (additional source)
Paranthus Andres, 1883 (additional source)
Paranthus rapiformis (Le Sueur, 1817) (additional source)
Peachia Gosse, 1855 (additional source)
Peachia parasitica (Agassiz, 1861) (additional source)
Protantheae accepted as Gonactiniidae Carlgren, 1893 (additional source)
Sagartiidae Gosse, 1858 (additional source)
Sagartiogeton Carlgren, 1924 (additional source)
Sagartiogeton verrilli Carlgren, 1942 (additional source)
Stephanauge Verrill, 1899 (additional source)
Stephanauge nexilis (Verrill, 1883) (additional source)
Stomphia (Gosse, 1859) (additional source)
Stomphia coccinea (Müller, 1776) (additional source)
Tealia Gosse, 1858 (additional source)
Tealia felina (Linnaeus, 1767) accepted as Urticina felina (Linnaeus, 1761) (additional source)
Thenaria (additional source)