URMO Taxon list
Anactinia carlgreni Nair, 1949
Anactinia indiana (Bamford, 1912)
Anactinia pelagica Annandale, 1909
Anactinia superficialis (Bamford, 1912)
Anthoactis armauerhanseni Leloup, 1932
Anthoactis australiae Carlgren, 1937
Anthoactis benedeni Leloup, 1932
Arachnactis albida Sars, 1846
Arachnactis bournei Fowler, 1897 accepted as Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859)
Arachnactis indica Panikkar, 1947
Arachnactis lloydii (Gosse, 1859) accepted as Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859)
Arachnactis panikkari Nair, 1949
Arachnactis sibogae McMurrich, 1910
Arachnactis valdiviae Carlgren, 1924
Arachnanthus australiae Carlgren, 1937
Arachnanthus bockii Carlgren, 1922
Arachnanthus errans Lopes, Scarabino, Carranza, Muñoz, Morandini, Nagata & Stampar, 2023
Arachnanthus oligopodus (Cerfontaine, 1891)
Arachnanthus sarsi Carlgren, 1912
Botruanthus benedeni (Torrey & Kleeberger, 1909)
Botrucnidiata damasi Leloup, 1932
Botrucnidifer norvegicus Carlgren, 1912
Botrucnidifer shtokmani Molodtsova, 2001
Bursanthus bamfordi Leloup, 1968
Calpanthula guinensis Van Beneden, 1897
Ceriantheomorphe adelita Lopes, Morandini & Stampar in Lopes et al., 2019
Ceriantheomorphe ambonensis (Kwietniewski, 1898)
Ceriantheomorphe brasiliensis (Mello-Leitão, 1919)
Ceriantheomorphe brasiliensis Carlgren, 1931 accepted as Ceriantheomorphe brasiliensis (Mello-Leitão, 1919)
Ceriantheopsis americana (Agassiz in Verrill, 1864)
Ceriantheopsis microbotanica Stampar, Mills & Keable, 2020
Ceriantheopsis nikitai Molodtsova, 2001
Ceriantheopsis zealandiaensis Stampar, Mills & Keable, 2020
Cerianthula atlantica Carlgren, 1931 (accepted > unreplaced junior homonym )
Cerianthula atlantica Van Beneden, 1924
Cerianthula benguelaensis Leloup, 1964
Cerianthula braemi Carlgren, 1924
Cerianthula canariensis Carlgren, 1924
Cerianthula lauriei Leloup, 1964
Cerianthula mediterranea Beneden, 1897
Cerianthula melo (Van Beneden, 1897)
Cerianthula michaelsarsi Carlgren, 1924
Cerianthula multiseptata Leloup, 1964
Cerianthula ommanneyi Leloup, 1964
Cerianthula polybotrucnidiata Leloup, 1964
Cerianthula rayneri Leloup, 1964
Cerianthula spinifer (van Beneden, 1897)
Cerianthus andamanensis Alcock, 1893 (uncertain > taxon inquirendum )
Cerianthus bathymetricus Moseley, 1877
Cerianthus brachysoma Cerfontaine, 1891 (uncertain > taxon inquirendum )
Cerianthus brasiliensis Mello-Leitão, 1919 accepted as Ceriantheomorphe brasiliensis (Mello-Leitão, 1919)
Cerianthus dohrni van Beneden, 1924 accepted as Pachycerianthus dohrni (van Beneden, 1924)
Cerianthus filiformis Carlgren, 1922
Cerianthus incertus Carlgren, 1932
Cerianthus japonicus Carlgren, 1922
Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859)
Cerianthus malakhovi Molodtsova, 2001
Cerianthus medusula (Klunzinger, 1877) (uncertain > taxon inquirendum )
Cerianthus membranaceous accepted as Cerianthus membranaceus (Gmelin, 1791)
Cerianthus membranaceus (Gmelin, 1791)
Cerianthus mortenseni Carlgren, 1922
Cerianthus natans Verrill, 1901 (uncertain > taxon inquirendum )
Cerianthus orientalis Verrill, 1866 (uncertain > taxon inquirendum )
Cerianthus profundus Andrès, 1881 (uncertain > taxon inquirendum )
Cerianthus punctatus Uchida, 1979
Cerianthus roulei Carlgren, 1912 accepted as Synarachnactis roulei (Carlgren, 1912)
Cerianthus septentrionalis Van Beneden, 1923 accepted as Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859)
Cerianthus sulcatus Kwietniewski, 1898
Cerianthus taedus McMurrich, 1910
Cerianthus tenebrarum Alcock, 1893 (uncertain > taxon inquirendum )
Cerianthus valdiviae Carlgren, 1912
Cerianthus vas McMurrich, 1893 (uncertain > taxon inquirendum )
Cerianthus vermicularis (Forbes in Johnston, 1847) (uncertain > taxon inquirendum )
Cerianthus vogti Danielssen, 1890
Dactylactis armata Van Beneden, 1897
Dactylactis benedeni Gravier, 1904
Dactylactis digitata Van Beneden, 1897
Dactylactis malayensis McMurrich, 1910
Dactylactis marri Leloup, 1964
Dactylactis viridis Verrill, 1898
Engodactylactis formosa (Gravier, 1920)
Hensenanthula dactylifera Van Beneden, 1897
Hensenanthula rotunda Leloup, 1964
Isapiactis obconica (McMurrich, 1910)
Isarachnactis brevis Calabresi, 1928
Isarachnactis lobiancoi (Carlgren, 1912)
Isarachnactis longipes Carlgren, 1924
Isarachnactis magnaghii Calabresi, 1928
Isarachnanthus bandanensis Carlgren, 1922
Isarachnanthus maderensis (Johnson, 1861)
Isarachnanthus panamensis Carlgren, 1922
Isodactylactis affinis Calabresi, 1927
Isodactylactis borealis Widersten, 1998
Isodactylactis discors (Senna, 1907)
Isodactylactis elegans (van Beneden, 1897)
Isodactylactis kempi Leloup, 1964
Isodactylactis obscura Calabresi, 1927
Isodactylactis praecox (Senna, 1907)
Isodactylactis tardiva (Senna, 1907)
Isovactis carlgreni Leloup, 1942