IRMNG Taxon list
Archaeoceania tournieri Picard & Rahm, 1954 accepted as Cnidostoma fallax Vanhöffen, 1911
Calycidion formosum Fewkes, 1882
Cionistes reticulata Wright, 1861
Clava capitata Thompson, 1844 accepted as Hydractinia echinata (Fleming, 1828)
Clava cornea Wright, 1857 accepted as Clava multicornis (Forsskål, 1775)
Clava diffusa Allman, 1863 accepted as Clava multicornis (Forsskål, 1775)
Clava leptostyla L. Agassiz, 1862
Clava multicornis (Forsskål, 1775)
Clava multiformis
Clava nana Motz-Kossowska, 1905
Clava nodosa Wright, 1863 accepted as Clava multicornis (Forsskål, 1775)
Clava nudum accepted as Rhizogeton nudus (Broch, 1909)
Clava parasitica Gmelin, 1788 accepted as Clava multicornis (Forsskål, 1775)
Clava squamata accepted as Rhizogeton nudus (Broch, 1909)
Clava squamata (Müller, 1776) accepted as Clava multicornis (Forsskål, 1775)
Clavactinia gallensis Thornely, 1904
Clavactinia multitentaculta Millard, 1975 accepted as Hydractinia multitentaculata (Millard, 1975)
Clavactinia protecta (Schuchert, 1996) accepted as accepted as Fiordlandia protecta Schuchert, 1996
Cnidostoma fallax Vanhöffen, 1911
Cystactinia ocalana Brooks, 1964 †
Dysmorphosa conchicola Philippi, 1842 accepted as Hydractinia exigua (Haeckel, 1880)
Dysmorphosa dubia Mayer, 1900 accepted as Hydractinia dubia (Mayer, 1900)
Dysmorphosa minuta Mayer, 1900 accepted as Lizzia blondina Forbes, 1848
Dysmorphosa tenuis Browne, 1902 accepted as Hydractinia tenuis (Browne, 1902)
Echinochorium clavigerum Hassall, 1841 accepted as Hydractinia echinata (Fleming, 1828)
Fiordlandia protecta Schuchert, 1996
Hydractinia aculeata (Wagner, 1833)
Hydractinia aggregata Fraser, 1911
Hydractinia alderi (Hodge, 1863)
Hydractinia allmani Bonnevie, 1898
Hydractinia altispina Millard, 1955
Hydractinia americana (Mayer, 1910)
Hydractinia americana Edwards, 1972
Hydractinia anechinata (Ritchie, 1907)
Hydractinia angusta Hartlaub, 1904
Hydractinia antonii Miglietta, 2006
Hydractinia apicata (Kramp, 1959)
Hydractinia arctica (Jäderholm, 1902)
Hydractinia areolata Alder, 1862
Hydractinia arge (Clarke, 1882)
Hydractinia armata Fraser, 1940
Hydractinia australis (Schuchert, 1996)
Hydractinia bayeri Hirohito, 1984
Hydractinia bella (Hand, 1961)
Hydractinia betkensis (Watson, 1978)
Hydractinia borealis (Mayer, 1900)
Hydractinia brachyurae (Hirohito, 1988)
Hydractinia calderi Bouillon, Medel & Peña-Cantero, 1997
Hydractinia californica Torrey, 1904
Hydractinia canalifera Millard, 1957
Hydractinia carcinicola (Hiro, 1939)
Hydractinia carica Bergh, 1887
Hydractinia carnea (M. Sars, 1846)
Hydractinia carolinae Fraser, 1912
Hydractinia clavata Jäderholm, 1905
Hydractinia claviformis (Bouillon, 1965)
Hydractinia conchicola (Yamada, 1947)
Hydractinia cryptoconcha Hirohito, 1988
Hydractinia cryptogonia Hirohito, 1988
Hydractinia cytaeiformis Vervoort, 2006
Hydractinia dendritica Hickson & Gravely, 1907
Hydractinia denhami (Thornely, 1904)
Hydractinia diogenes Millard, 1959
Hydractinia disjuncta Fraser, 1938
Hydractinia dongshanensis Xu & Huang, 2006
Hydractinia dubia (Mayer, 1900)
Hydractinia echinata (Fleming, 1828)
Hydractinia echinulata De Blainville
Hydractinia epiconcha Stechow, 1908
Hydractinia epidocleensis Leloup, 1931
Hydractinia epispongia Fraser, 1938
Hydractinia exigua (Haeckel, 1880)
Hydractinia fallax Broch, 1914
Hydractinia fucicola (Sars, 1857)
Hydractinia fuciola accepted as Stylactis fuciola (Sars, 1857) accepted as Hydractinia fucicola (Sars, 1857)
Hydractinia gorgonoides (Nutting, 1906)
Hydractinia granulata Hirohito, 1988
Hydractinia grisea Leuckart, 1847 accepted as Hydractinia echinata (Fleming, 1828)
Hydractinia guangxiensis Huang, Li & Zhang, 2010
Hydractinia hancocki Fraser, 1938
Hydractinia hartlaubi Neppi & Stiasny, 1911 accepted as Hydractinia areolata Alder, 1862
Hydractinia hayamaensis (Hirohito, 1988)
Hydractinia hooperi (Sigerfoos, 1899)
Hydractinia humilis (Hartlaub, 1905)
Hydractinia humilis Bonnevie, 1898
Hydractinia inabai (Hirohito, 1988)
Hydractinia incerta Van Beneden, 1867
Hydractinia inermis (Allman, 1872)
Hydractinia ingolfi Kramp, 1932
Hydractinia kaffaria Millard, 1955
Hydractinia kaffraria Millard, 1955
Hydractinia lactea Van Beneden, 1841
Hydractinia laevispina Fraser, 1922
Hydractinia longispina Fraser, 1938
Hydractinia mar (Gasco & Calder, 1993)
Hydractinia marsupialia Millard, 1975
Hydractinia meteoris (Thiel, 1938)
Hydractinia michaelseni Broch, 1914
Hydractinia milleri Torrey, 1902
Hydractinia minima (Trinci, 1903)