Aahithis Schallreuter, 1988 † (extant flag source)
Aahithis Schallreuter, 1988 † (habitat flag source)
Abderos Schüller & Jirkov, 2013 (habitat flag source)
Abderos Schüller & Jirkov, 2013 (extant flag source)
Abditoporella Sosa-Yañez, Vieira & Solís-Marín, 2015 (extant flag source)
Abditoporella Sosa-Yañez, Vieira & Solís-Marín, 2015 (habitat flag source)
Aboderium Rhumbler, 1913 accepted as Boderia Wright, 1867 (habitat flag source)
Abyssaforia Sysoev & Kantor, 1987 (source of synonymy)
Abyssoprimnoa Cairns, 2015 (habitat flag source)
Acanomyphoria Guo, 1985 † (basis of record)
Acanomyphoria Guo, 1985 † (habitat flag source)
Acanomyphoria Guo, 1985 † (extant flag source)
Acanthocercodes Kritsky & Diggles, 2015 (habitat flag source)
Acinoproscelos Bamber & Błażewicz-Paszkowycz, 2013 (habitat flag source)
Acipenserobdella Epstein, 1969 (habitat flag source)
Actinactis accepted as Asteractis Verrill, 1869 (habitat flag source)
Actinellopsis J.C. Taylor, B. Karthick & J.P. Kociolek in Taylor, Karthick, Kociolek, Wetzel & Cocquyt, 2014 (current name source)
Actinellopsis J.C. Taylor, B. Karthick & J.P. Kociolek in Taylor, Karthick, Kociolek, Wetzel & Cocquyt, 2014 (verified source for family)
Actiniloba accepted as Actinoloba de Blainville, 1830 (habitat flag source)
Actiniodes accepted as Actinioides Haddon & Shackleton, 1893 (habitat flag source)
Actinonernus accepted as Actinernus Verrill, 1879 (habitat flag source)
Actinula accepted as Similipecten Winckworth, 1932 (verified source for family)
Actinula accepted as Similipecten Winckworth, 1932 (habitat flag source)
Actinula accepted as Similipecten Winckworth, 1932 (basis of record)
Aculamprotula Wu, Liang, Wang & Shan, 1999 (habitat flag source)
Acutiangulata Buschmina, 1968 † (habitat flag source)
Acutiangulata Buschmina, 1968 † (extant flag source)
Acyphoniscus Frankenberger, 1941 (habitat flag source)
Adaugammarus Sidorov, Gontcharov & Sharina, 2015 (habitat flag source)
Admytilus Berezovsky, 2015 † (habitat flag source)
Admytilus Berezovsky, 2015 † (extant flag source)
Adolescaria Sinitzin, 1911 (habitat flag source)
Aenigmula Golding, 2014 (habitat flag source)
Aequacytheridea Mandelstam, 1947 † (habitat flag source)
Aequacytheridea Mandelstam, 1947 † (extant flag source)
Aerosakkonema N.K. Thu & M.M. Watanabe in Thu, Tanabe, Yoshida, Matsuura & Watanabe, 2012 (current name source)
Aetokthonos S.B. Wilde & J.R. Johansen in Wilde, Johansen, Wilde, Jiang, Bartelme & Haynie, 2014 (current name source)
Afonsoconus Tucker & Tenorio, 2013 accepted as Conus Linnaeus, 1758 (habitat flag source)
Africana Ocaña & Brito in Ocaña et al., 2015 accepted as Euafricana Ceccolini & Cianferoni, 2021 (basis of record)
Africana Ocaña & Brito in Ocaña et al., 2015 accepted as Euafricana Ceccolini & Cianferoni, 2021 (extant flag source)
Africana Ocaña & Brito in Ocaña et al., 2015 accepted as Euafricana Ceccolini & Cianferoni, 2021 (habitat flag source)
Afrozoila Fehse, 2016 (habitat flag source)
Afrozoila Fehse, 2016 (extant flag source)
Afsharius M. Huber, Langleit & Kreipl, 2015 (habitat flag source)
Agrafia Szarowska & Falniowski, 2011 (habitat flag source)
Ahlibeyrichia Schallreuter & Schaefer, 1988 † (extant flag source)
Ahlibeyrichia Schallreuter & Schaefer, 1988 † (habitat flag source)
Ailadinium M. Saburoa & N. Chomérat, 2014 (current name source)
Aipstasia accepted as Aiptasia Gosse, 1858 (habitat flag source)
Aiptasimorpha Stephenson, 1920 accepted as Aiptasiomorpha Stephenson, 1920 (habitat flag source)
Aiptosiogeton Schmidt, 1972 accepted as Aiptasiogeton Schmidt, 1972 (habitat flag source)
Akidellina Rozhdestvenskaya, 1972 † (habitat flag source)
Akidellina Rozhdestvenskaya, 1972 † (extant flag source)
Alacuppa Oskars, Bouchet & Malaquias, 2015 (habitat flag source)
Alaona M. Huber, Langleit & Kreipl, 2015 (habitat flag source)
Albacythere Kozur & Nicklas, 1970 † (habitat flag source)
Albacythere Kozur & Nicklas, 1970 † (extant flag source)
Albileberis Hou, 1978 † (habitat flag source)
Albileberis Hou, 1978 † (extant flag source)
Alcomaja Ng & Richer de Forges, 2015 (habitat flag source)
Allogenarchopsis Urabe & Shimazu, 2013 (habitat flag source)
Allolepidapedon Yamaguti, 1940 (habitat flag source)
Alloleptochelia Guţu, 2016 (habitat flag source)
Allopolymorphina Quilty & Whitehead, 2014 † (habitat flag source)
Allopolymorphina Quilty & Whitehead, 2014 † (extant flag source)
Alphacarmotetravirus (habitat flag source)
Alphamesonivirus (habitat flag source)
Alphapermutotetravirus (habitat flag source)
Alpinoschwagerina Bensh, 1972 † accepted as Pseudoschwagerina Dunbar & Skinner, 1936 † (habitat flag source)
Alpinoschwagerina Bensh, 1972 † accepted as Pseudoschwagerina Dunbar & Skinner, 1936 † (extant flag source)
Altana M.S. Kulikovskiy, H. Lange-Bertalot & D. Metzeltin in Kulikovskiy, Lange-Bertalot, Metzeltin & Witkowski, 2012 (verified source for family)
Altana M.S. Kulikovskiy, H. Lange-Bertalot & D. Metzeltin in Kulikovskiy, Lange-Bertalot, Metzeltin & Witkowski, 2012 (current name source)
Altha Neckaja, 1955 † (habitat flag source)
Altha Neckaja, 1955 † (extant flag source)
Alverezina Bermudez & Rivero, 1963 accepted as Eggerella Cushman, 1933 (habitat flag source)
Alverezina Bermudez & Rivero, 1963 accepted as Eggerella Cushman, 1933 (extant flag source)
Amalthea R. D'Archino & W.A. Nelson in D'Archino, Nelson & Zuccarello, 2014 (current name source)
Ambiaxiopsis Komai, 2011 (habitat flag source)
Americoliva Petuch, 2013 (habitat flag source)
Ameritella M. Huber, Langleit & Kreipl, 2015 (habitat flag source)
Amicus Tschigova, 1977 † (extant flag source)
Amicus Tschigova, 1977 † (habitat flag source)
Ammassolinea P. Hašler, P. Dvořák, A. Poulíčková & D.A. Casamatta, 2014 (basis of record)
Amphicervis Mound, 1961 † (extant flag source)
Amphicocconeis M. De Stefano & D. Marino, 2003 (current name source)
Amphilothaceae (basis of record)
Amphilothales (basis of record)
Amphiro McIntosh, 1922 accepted as Terebella Linnaeus, 1767 (habitat flag source)
Amphiro McIntosh, 1922 accepted as Terebella Linnaeus, 1767 (extant flag source)
Amphithalmus accepted as Amphithalamus Carpenter, 1864 (habitat flag source)
Amygdalonajas Crosse & Fischer, 1894 accepted as Truncilla Rafinesque, 1819 (habitat flag source)
Anadontoides Simpson in F.C. Baker, 1898 accepted as Anodontoides Simpson in F.C. Baker, 1898 (habitat flag source)
Anastegina Vitalis-Zilahy, 1966 accepted as Operculina d'Orbigny, 1826 (habitat flag source)
Anastegina Vitalis-Zilahy, 1966 accepted as Operculina d'Orbigny, 1826 (extant flag source)
Anaulaca Shu & Cui, 1983 † (habitat flag source)
Anaulaca Shu & Cui, 1983 † (extant flag source)
Andersenia R. Wetherbee & R.F. Waller in Wetherbee, Gornik, Grant & Waller, 2015 (current name source)
Anechinocardium Hickman, 2015 † (habitat flag source)
Anechinocardium Hickman, 2015 † (extant flag source)
Anenonia accepted as Anemonia Risso, 1826 (habitat flag source)

 Nomenclatural status

 for Idotoega Lockington, 1877

orthographia [details]

 Nomenclatural status

 for Phyllophorus Heding & Panning, 1954

later usage [details]

 Nomenclatural status

 for Phyllophorus Heding & Panning, 1954

later usage [details]

 Nomenclatural status

 for Sursumara Malyutina, 2003

orthographia [details]

 Nomenclatural status

 for Sursumara affinis Malyutina, 2004

orthographia [details]

 Taxonomic remark

 for Amphiraphia J.-Y. Chen & H.-Z. Zhu, 1983

Amphiraphia cells, initially considered to represent a new family and order by the describers, are in fact the ... [details]

 Taxonomic remark

 for Auricularia Chun, 1896

Authorship as given in WoRMS (2016), but possibly a later usage of Auricularia Müller, 1849, a suppressed name ... [details]

 Taxonomic remark

 for Bathylevensteinia Pettibone, 1976

Misspelling in Pettibone (1994) when she transferred the genus to Macellicephalinae; Bathylevensteina is correct ... [details]

 Taxonomic remark

 for Echinotrochus Leske, 1778

A nomen nudum according to A. Kroh, 2011, details in relevant WoRMS record. [details]

 Taxonomic remark

 for Harenorhynchus Hoxhold, 1974

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Harenorhynchus proterandrius Hoxhold, 1974

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Hyphalocythere Benson, 1976

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Hyphalocythere acanthoderma (Brady, 1880)

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Idotoega Lockington, 1877

Emended in errata to Idotaega (Nomen. Zool.) [details]

 Taxonomic remark

 for Jatoba Poinar, Vega & Stroiński, 2020 †

Journal issue is for 2021, however article published online in 2020, taxon has associated ZooBank LSID. [details]

 Taxonomic remark

 for Lamelliposthia Steinböck, 1932

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Lamelliposthia rubromaculata Steinböck & Lanser, 1932

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Lamelliposthia rubropunctata Steinböck, 1932

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Lycastis Audouin & Milne-Edwards, 1833

Hartman Catalogue wrongly records the name as a homonym, however according to WoRMS (2016) it is a later usage of ... [details]

 Taxonomic remark

 for Oxycythereis Benson, 1974

This genus (nomen nudum) was replaced by Pennyella Neale, 1974 (WoRMS, 2016). [details]

 Taxonomic remark

 for Raphidiophorus Thompson, 1979 †

According to WoRMS, the spelling Raphidiophorus as used in the article title is a lapsus for the correct spelling ... [details]

 Taxonomic remark

 for Rhaphidiophorus Thompson, 1979 †

Intended correct spelling (Raphidiophorus is a lapsus in article title), refer original work and note in WoRMS, 2016. [details]

 Taxonomic remark

 for Spirorbidae

Currently valid as subfamily (Spirorbinae), refer WoRMS. [details]

 Taxonomic remark

 for Spongiobranchaea d'Orbigny, 1836

Original spelling Spongiobranchea; the spelling Spongiobranchaea is in prevailing usage according to WoRMS (2016) and ... [details]

 Taxonomic remark

 for Suhmicythere Benson, 1974

This nomen nudum was replaced by Dutoitella Dingle, 1989 (information from WorMS, 2016) [details]

 Taxonomic remark

 for Sursumara Malyutina, 2003

Literature misspelling. [details]

 Taxonomic remark

 for Sursumara affinis Malyutina, 2004

Literature misspelling. [details]

 Taxonomic remark

 for Thalassocythere Benson, 1977

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for Thalassocythere acanthoderma (Brady, 1880)

A nomen nudum according to WoRMS. [details]

 Taxonomic remark

 for 

Record from WoRMS (2013) but presumably not a species epithet. [details]

 Taxonomic remark

 for Xandarosina Benson in Benson & Sylvester-Bradley, 1971

This nomen nudum was replaced by Bathycythere Sissingh, 1971 (WoRMS, 2016) [details]