Acanthoisis flabellum Wright & Studer, 1889 (basis of record)
Acontiactis gokhaleae England, 1990 (additional source)
Acontiaria Stephenson, 1935 (basis of record)
Acontiophorum bombayense Parulekar, 1968 (basis of record)
Acontiophorum bombayensis Parulekar, 1968 accepted as Acontiophorum bombayense Parulekar, 1968 (additional source)
Acontiophorum mortenseni Carlgren, 1938 (additional source)
Acontiophorum niveum Fautin, Eppard & Mead, 1988 (additional source)
Acraspedanthus elongatus Carlgren, 1924 accepted as Isoparactis ferax (Stuckey, 1909) (basis of record)
Acraspedanthus ferax (Stuckey, 1909) accepted as Isoparactis ferax (Stuckey, 1909) (additional source)
Acthelmis intestinalis (Fabricius, 1780) (additional source)
Actinauge abyssorum Carlgren, 1934 (additional source)
Actinauge bocki Carlgren, 1943 (additional source)
Actinauge chilensis Carlgren, 1959 (additional source)
Actinauge cristata Riemann-Zürneck, 1986 (additional source)
Actinauge granulata Carlgren, 1928 (additional source)
Actinauge longicornis (Verrill, 1882) (basis of record)
Actinauge richardi (Marion, 1906) (additional source)
Actinauge verrilli McMurrich, 1893 accepted as Actinauge verrillii McMurrich, 1893 (basis of record)
Actinauge verrillii McMurrich, 1893 (basis of record)
Actinecta de Blainville, 1830 (basis of record)
Actinecta coerulea (Lesson, 1830) (basis of record)
Actinecta cyanea (Brandt, 1835) (basis of record)
Actinecta olivacea (Le Sueur, 1817) (basis of record)
Actinecta torpedo (Bell, 1886) (basis of record)
Actinecta ultramarina (Péron & Le Sueur in Le Sueur, 1817) (basis of record)
Actinecta viridula (Quoy & Gaimard, 1833) (basis of record)
Actineria dendrophora Haddon & Shackleton, 1893 (additional source)
Actineria villosa Quoy & Gaimard in de Blainville, 1830 (additional source)
Actinernidae Stephenson, 1922 (additional source)
Actinernus antarcticus (Carlgren, 1914) (basis of record)
Actinernus elongatus (Hertwig, 1882) (additional source)
Actinernus michaelsarsi Carlgren, 1918 (additional source)
Actinernus nobilis Verrill, 1879 (basis of record)
Actinernus robustus (Hertwig, 1882) (additional source)
Actinia abyssicola Moseley, 1877 accepted as Stephanauge abyssicola (Moseley, 1877) (basis of record)
Actinia alba Risso, 1827 (additional source)
Actinia anachoreta Pax, 1922 accepted as Pseudactinia infecunda (McMurrich, 1893) (source of synonymy)
Actinia aster Ellis, 1768 (additional source)
Actinia atrimaculata Grube, 1840 (additional source)
Actinia australiensis Carlgren, 1950 (additional source)
Actinia bermudensis (McMurrich, 1889) (additional source)
Actinia bicolor Le Sueur, 1817 accepted as Calliactis tricolor (Le Sueur, 1817) (source of synonymy)
Actinia bicornis Müller, 1776 (additional source)
Actinia brevicirrhata Risso, 1827 accepted as Cereus pedunculatus (Pennant, 1777) (additional source)
Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (basis of record)
Actinia cari Delle Chiaje, 1822 (additional source)
Actinia carneola Stimpson, 1853 accepted as Stomphia coccinea (Müller, 1776) (source of synonymy)
Actinia chlorodactyla Brandt, 1835 (additional source)
Actinia cleopatrae Hemprich & Ehrenberg in Ehrenberg, 1834 (additional source)
Actinia curta Drayton in Dana, 1846 (additional source)
Actinia delicatula (Hertwig, 1888) (additional source)
Actinia denticulosa Le Sueur, 1817 accepted as Corynactis denticulosa (Le Sueur, 1817) (source of synonymy)
Actinia dubia Lesson, 1830 (additional source)
Actinia elongata Delle Chiaje, 1825 (additional source)
Actinia equina (Linnaeus, 1758) (additional source)
Actinia erythrospilota Brandt, 1835 (additional source)
Actinia filiformis Rapp, 1829 accepted as Cereus filiformis (Rapp, 1829) (additional source)
Actinia fiscella Müller, 1789 (additional source)
Actinia fragacea Tugwell, 1856 (additional source)
Actinia gelatinosa Moseley, 1877 (additional source)
Actinia gemma Drayton in Dana, 1846 (additional source)
Actinia glandulosa Otto, 1823 accepted as Bunodactis glandulosa (Otto, 1823) (additional source)
Actinia gracilis Hemprich & Ehrenberg in Ehrenberg, 1834 (additional source)
Actinia grobbeni Watzl, 1922 (additional source)
Actinia iris Müller, 1789 (additional source)
Actinia judaica (Linnaeus, 1761) (additional source)
Actinia kraemeri Pax, 1914 (additional source)
Actinia laurentii Brandt, 1835 (additional source)
Actinia mamillaris Quoy & Gaimard, 1833 (additional source)
Actinia melanaster Verrill, 1901 accepted as Anemonia melanaster (Verrill, 1901) (source of synonymy)
Actinia mertensii Brandt, 1835 (additional source)
Actinia minutissima Le Sueur, 1817 (additional source)
Actinia multicolor Stimpson, 1856 accepted as Physactis multicolor (Stimpson, 1856) (additional source)
Actinia nigropunctata Stimpson, 1856 accepted as Sagartia nigropunctata (Stimpson, 1856) accepted as Cylista nigropunctata (Stimpson, 1856) (source of synonymy)
Actinia nitida Dawson, 1858 accepted as Stomphia coccinea (Müller, 1776) (basis of record)
Actinia obtruncata Stimpson, 1853 (additional source)
Actinia papuana Quoy & Gaimard, 1833 (additional source)
Actinia phaeochira (Schmarda, 1852) accepted as Anemonia sulcata (Pennant, 1777) (additional source)
Actinia prasina Gosse, 1860 (additional source)
Actinia reclinata Bosc, 1802 (additional source)
Actinia rosea Risso, 1827 (additional source)
Actinia rosula Ehrenberg, 1834 (additional source)
Actinia rufa Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (additional source)
Actinia simplex Ehrenberg, 1834 (additional source)
Actinia striata Quoy & Gaimard, 1833 (additional source)
Actinia striata Rizzi, 1907 (additional source)
Actinia tenebrosa Farquhar, 1898 (additional source)
Actinia tongana Quoy & Gaimard, 1833 (additional source)
Actinia truncata Müller, 1776 (additional source)
Actinia varians Müller, 1806 (additional source)
Actinia violacea Risso, 1827 (additional source)
Actinia virgata Johnson, 1861 accepted as Actinia cari Delle Chiaje, 1822 (additional source)
Actinia volva Müller, 1776 (additional source)
Actinia yarrellii Cocks, 1851 (additional source)
Actinia zebra Grube, 1840 (additional source)
Actiniaria (additional source)
Actiniogeton Carlgren, 1938 accepted as Gyractis Boveri, 1893 (source of synonymy)
Actiniogeton ambonensis (Kwietniewski, 1898) accepted as Anthopleura ambonensis (Kwietniewski, 1898) (additional source)
Actiniogeton spenceri (Haddon & Duerden, 1896) accepted as Gyractis spenceri (Haddon & Duerden, 1896) (source of synonymy)
Actinioidea Rafinesque, 1815 (basis of record)