Abraliopsis gilchristi (G. C. Robson, 1924) (additional source)
Acanthopriapulus horridus (Théel, 1911) (additional source)
Achelia barnardi Stock, 1959 (additional source)
Achelia brevicauda (Loman, 1904) (additional source)
Achelia columnaris Stock, 1992 (additional source)
Achelia communis (Bouvier, 1906) (additional source)
Achelia parvula (Loman, 1923) (additional source)
Achelia quadridentata (Hodgson, 1910) (additional source)
Achelia serratipalpis (Bouvier, 1911) (additional source)
Acontiophoridae Carlgren, 1938 (basis of record)
Acontiophorum (basis of record)
Actinoposthiidae Hooge, 2001 (basis of record)
Actinostella Duchassaing, 1850 (basis of record)
Adenopea cenata (Du Bois-Reymond Marcus, 1955) (basis of record)
Aglauropsis Müller, 1865 (basis of record)
Agnezia glaciata Michaelsen, 1898 (additional source)
Aidanosagitta Tokioka & Pathansali, 1963 (basis of record)
Aidanosagitta neglecta (Aida, 1897) (basis of record)
Aidanosagitta regularis (Aida, 1897) (basis of record)
Alatina Gershwin, 2005 (basis of record)
Alcyonium flaccidum Tixier-Durivault, 1966 accepted as Klyxum flaccidum (Tixier-Durivault, 1966) (additional source)
Alcyonium planiceps Williams, 1986 accepted as Lampophyton planiceps (Williams, 1986) (additional source)
Alloposus mollis A. E. Verrill, 1880 accepted as Haliphron atlanticus Steenstrup, 1861 (source of synonymy)
Ammothea depolaris Stock, 1966 (additional source)
Ammothella hedgpethi Fage, 1953 (additional source)
Ammothella setacea (Helfer, 1938) (additional source)
Amphioctopus P. Fischer, 1882 (basis of record)
Amphioxus lanceolatus (Pallas, 1774) accepted as Branchiostoma lanceolatum (Pallas, 1774) (source of synonymy)
Amphiscolops carvalhoi Marcus, 1952 accepted as Heterochaerus carvalhoi (Marcus, 1952) (basis of record)
Amphiscolops evelinae Marcus, 1947 (basis of record)
Amphitretus Hoyle, 1885 (basis of record)
Amphitretus pelagicus Hoyle, 1885 (basis of record)
Anactinia Annandale, 1909 (basis of record)
Anelassorhynchus indivisus (Sluiter, 1900) (additional source)
Anelassorhynchus moebii (Greeff, 1879) (basis of record)
Anomastrea Marenzeller, 1901 accepted as Anomastraea Marenzeller, 1901 (basis of record)
Anoplodactylus aculeatus Möbius, 1902 (additional source)
Anoplodactylus australis (Hodgson, 1914) (additional source)
Anoplodactylus capensis (Flynn, 1928) (additional source)
Anoplodactylus marcusi (Mello-Leitao, 1949) (additional source)
Anoplodactylus massiliensis Bouvier, 1916 (additional source)
Anoplodactylus ophiurophilus Stock, 1979 (additional source)
Anoplodactylus spurius Stock, 1992 (additional source)
Anoplodactylus stictus Marcus, 1940 (additional source)
Anoplodactylus unilobus Stock, 1959 (additional source)
Anoplodactylus vemae Child, 1982 (additional source)
Anous minutus Boie, 1844 (basis of record)
Anthelia flava (May, 1898) accepted as Sansibia flava (May, 1898) (additional source)
Anthostella Carlgren, 1938 (basis of record)
Anthothoe Carlgren, 1938 (basis of record)
Antillesoma antillarum (Grube, 1858) (additional source)
Antipathes abies (Linnaeus, 1758) accepted as Cupressopathes abies (Linnaeus, 1758) (source of synonymy)
Antipathes squamosa Koch, 1886 accepted as Tanacetipathes squamosa (Koch, 1886) (source of synonymy)
Aphilodon maritimus Lawrence, 1963 (additional source)
Aphrodoctopus schultzei (Hoyle, 1910) accepted as Eledone schultzei (Hoyle, 1910) (basis of record)
Aphrodroma Olson, 2000 (basis of record)
Aphrodroma brevirostris (Lesson, 1831) (basis of record)
Apionsoma (Edmondsius) pectinatum (Keferstein, 1867) (basis of record)
Aplidium altarium (Sluiter, 1909) (additional source)
Aplidium circulatum (Hartmeyer, 1912) (additional source)
Aplidium crustatum Monniot C., Monniot F., Griffiths & Schleyer, 2001 (additional source)
Aplidium flavolineatum (Sluiter, 1898) (additional source)
Aplidium haesitans Monniot C., Monniot F., Griffiths & Schleyer, 2001 (additional source)
Aplidium lobatum Savigny, 1816 (additional source)
Aplidium monile Monniot C., Monniot F., Griffiths & Schleyer, 2001 (additional source)
Aplidium pantherinum (Sluiter, 1898) (additional source)
Aplidium proliferum (Milne Edwards, 1841) (additional source)
Aplidium retiforme (Herdman, 1886) (additional source)
Aplidium solidum (Ritter & Forsyth, 1917) (additional source)
Apochela (basis of record)
Apodibius Dastych, 1983 (basis of record)
Apodibius nuntius Binda, 1984 (basis of record)
Arachnopathes Milne Edwards H., 1857 (basis of record)
Archaphanostoma marcusi Hooge & Rocha, 2006 accepted as Baltalimania marcusi (Hooge & Rocha, 2006) (basis of record)
Archidistoma aggregatum Garstang, 1891 (additional source)
Arhynchite Satô, 1937 (basis of record)
Arhynchite paulensis Amor, 1971 (basis of record)
Arthrotardigrada (basis of record)
Ascidia caudata Heller, 1878 (additional source)
Ascidia incrassata Heller, 1878 (additional source)
Ascidia munda Sluiter, 1898 (additional source)
Ascidia nigra (Savigny, 1816) accepted as Phallusia nigra Savigny, 1816 (additional source)
Ascidia retrosipho Millar, 1988 (additional source)
Ascidia sydneiensis Stimpson, 1855 (additional source)
Ascidiella aspersa (Müller, 1776) (additional source)
Ascorhynchus breviscapus Stock, 1968 (additional source)
Ascorhynchus corderoi du Bois-Reymond Marcus, 1952 (additional source)
Ascorhynchus inflatum Stock, 1963 accepted as Ascorhynchus inflatus Stock, 1963 (additional source)
Ascorhynchus ios Bamber & Thurston, 1993 (additional source)
Ascorhynchus ornatus (Helfer, 1938) (additional source)
Ascorhynchus pennai Mello-Leitao, 1946 (additional source)
Ascorhynchus simile Fage, 1942 (additional source)
Ascorhynchus somaliensis Stock, 1994 (additional source)
Aspidosiphon (Aspidosiphon) elegans (Chamisso & Eysenhardt, 1821) (additional source)
Aspidosiphon (Aspidosiphon) muelleri Diesing, 1851 represented as Aspidosiphon (Aspidosiphon) muelleri muelleri Diesing, 1851 (additional source)
Aspidosiphon (Paraspidosiphon) coyi Quatrefages, 1866 (basis of record)
Aspidosiphon (Paraspidosiphon) laevis Quatrefages, 1866 (additional source)
Aspidosiphon (Paraspidosiphon) steenstrupii Diesing, 1859 (additional source)
Asterocarpa humilis (Heller, 1878) (additional source)
Astrogorgia Verrill, 1868 (basis of record)

Ascensión for Echiniscus calcaratus Richters, 1908 
Ascensión for Macrobiotus ascensionis Richters, 1908 
Cape Verdean Exclusive Economic Zone for Ascorhynchus ios Bamber & Thurston, 1993 
Congo Basin for Limnocnida congoensis Bouillon, 1957 
Guinea for Macrobiotus priviterae Binda, Pilato, Moncada & Napolitano, 2001 
Kinshasa for Hypsibius multituberculatus Pilato, Binda & Lisi, 2003 
Kinshasa for Macrobiotus ragonesei Binda, Pilato, Moncada & Napolitano, 2001 
Madagascar for Cornechiniscus madagascariensis Maucci, 1993 
Madagascar for Discrepunguis polygonatus (Binda & Guglielmino, 1990) 
Madagascar for Echiniscus walteri Pilato & Lisi, 2003 
Madagascar for Hydra madagascariensis Campbell, 1999 
Madagascar for Macrobiotus madegassus Maucci, 1993 
Madeira for Echiniscus canedoi da Cunha & do Nascimento Ribeiro, 1962 
Madeira for Echiniscus manuelae da Cunha & do Nascimento Ribeiro, 1962 
Morocco for Echiniscus bisculptus Maucci, 1983 
Nosy Chesterfield (Madagascar) for Paracanthoisis richerdeforgesi (Bayer & Stefani, 1987) 
Seychelles for Discrepunguis tetrannulatus (Pilato, Binda & Lisi, 2004) 
Seychelles for Doryphoribius korganovae Biserov, 1994 
Seychelles for Echiniscus malpighii Biserov, 1994 
Seychelles for Echiniscus tropicalis Binda & Pilato, 1995 
Seychelles for Macrobiotus gerlachae Pilato, Binda & Lisi, 2004 
Seychelles for Macrobiotus pseudonuragicus Pilato, Binda & Lisi, 2004 
Seychelles for Macrobiotus seychellensis Biserov, 1994 
Seychelles for Minibiotus decrescens Binda & Pilato, 1995 
South Africa (country) for Distaplia capensis Michaelsen, 1934 
South Africa (country) for Distaplia durbanensis Millar, 1964 
South Africa (country) for Distaplia skoogi Michaelsen, 1924 
South Africa (country) for Eucoelium pallida (Millar, 1962) 
South Africa (country) for Halecium muricatum (Ellis & Solander, 1786) 
South Africa (country) for Hypodistoma vastum (Millar, 1962) 
South Africa (country) for Sigillina digitata (Millar, 1962) 
South Africa (country) for Sigillina psammophorus (Hartmeyer, 1912) 
South Africa (country) for Stereotheca elongata (Lamouroux, 1816) 
South Africa (country) for Sycozoa arborenscens Hartmeyer, 1912 
South Africa (country) for Symplectoscyphus indivisus (Bale, 1882) 
South Coast of Africa for Proechinophthirus zumpti Werneck, 1955 
St. Helena Exclusive Economic Zone for Amphianthus sanctaehelenae Carlgren, 1941 
St. Helena Exclusive Economic Zone for Anthopleura mortenseni Carlgren, 1941 
St. Helena Exclusive Economic Zone for Anthopleura sanctaehelenae Carlgren, 1941 
St. Helena Exclusive Economic Zone for Edwardsia sanctaehelenae Carlgren, 1941 
St. Helena Exclusive Economic Zone for Sclerhelia hirtella (Pallas, 1766) 
St. Helena Exclusive Economic Zone for Stichopathes filiformis (Gray, 1868) 
Tanzania for Discrepunguis polygonatus (Binda & Guglielmino, 1990) 
Tanzania for Doryphoribius maranguensis Binda & Pilato, 1995 
Tanzania for Echiniscus cirinoi Binda & Pilato, 1993 
Tanzania for Macrobiotus iharosi Pilato, Binda & Catanzaro, 1991 
Tanzania for Macrobiotus radiatus Pilato, Binda & Catanzaro, 1991 
Tanzania for Macrobiotus vanescens Pilato, Binda & Catanzaro, 1991 
Tanzania for Milnesium tetralamellatum Pilato & Binda, 1991 
Tanzania for Minibiotus africanus Binda & Pilato, 1995 
Tanzania for Parascon schusteri Pilato & Binda, 1987 
Tristan Da Cunha Exclusive Economic Zone for Achelia communis (Bouvier, 1906) 
Tunisia for Macrobiotus diffusus Binda & Pilato, 1987 
West Coast of South Africa for Larus hartlaubi Bruch, 1853 
Western South Atlantic for Acanthopriapulus horridus (Théel, 1911) 
Western South Atlantic for Achelia columnaris Stock, 1992 
Western South Atlantic for Achelia parvula (Loman, 1923) 
Western South Atlantic for Adenopea cenata (Du Bois-Reymond Marcus, 1955) 
Western South Atlantic for Aglauropsis agassizi Müller, 1865 
Western South Atlantic for Aglauropsis kawari Moreira & Yamashita, 1972 
Western South Atlantic for Alcyonium southgeorgiensis Casas, Ramil & van Ofwegen, 1997 
Western South Atlantic for Ammothea depolaris Stock, 1966 
Western South Atlantic for Amphiscolops carvalhoi Marcus, 1952 
Western South Atlantic for Amphiscolops evelinae Marcus, 1947 
Western South Atlantic for Anoplodactylus marcusi (Mello-Leitao, 1949) 
Western South Atlantic for Anoplodactylus spurius Stock, 1992 
Western South Atlantic for Anoplodactylus stictus Marcus, 1940 
Western South Atlantic for Anoplodactylus vemae Child, 1982 
Western South Atlantic for Archaphanostoma marcusi Hooge & Rocha, 2006 
Western South Atlantic for Arhynchite paulensis Amor, 1971 
Western South Atlantic for Ascorhynchus pennai Mello-Leitao, 1946 
Western South Atlantic for Avagina marci Dörjes & Karling, 1975 
Western South Atlantic for Billardia intermedia Blanco, 1967 
Western South Atlantic for Branchiostoma platae Hubbs, 1922 
Western South Atlantic for Briareopsis aegeon Bayer, 1993 
Western South Atlantic for Bunodactis patagoniensis (Carlgren, 1899) 
Western South Atlantic for Bunodosoma caissarum Corrêa in Belém, 1987 
Western South Atlantic for Calliactis androgyna Riemann-Zürneck, 1975 
Western South Atlantic for Callipallene evelinae Marcus, 1940 
Western South Atlantic for Callipallene margarita (Gordon, 1932) 
Western South Atlantic for Campanularia agas Cornelius, 1982 
Western South Atlantic for Campanularia clytioides (Lamouroux, 1824) 
Western South Atlantic for Carcinactis dolosa Riemann-Zürneck, 1975 
Western South Atlantic for Cateria styx Gerlach, 1956 
Western South Atlantic for Ceriantheomorphe brasiliensis Carlgren, 1931 
Western South Atlantic for Childia etium (Marcus, 1954) 
Western South Atlantic for Childia westbladi (Marcus, 1950) 
Western South Atlantic for Chiropsalmus zygonema Haeckel, 1880 
Western South Atlantic for Chromonephthea braziliensis van Ofwegen, 2005 
Western South Atlantic for Chrysaora lactea Eschscholtz, 1829 
Western South Atlantic for Cilunculus acanthus Fry & Hedgpeth, 1969 
Western South Atlantic for Coelocormus huxleyi Herdman, 1886 
Western South Atlantic for Colossendeis geoffroyi Mane-Garzon, 1944 
Western South Atlantic for Conocyema marplatensis Penschaszadeh & Christiansen, 1970 
Western South Atlantic for Corymorpha januarii Steenstrup, 1855 
Western South Atlantic for Corynactis carnea Studer, 1879 
Western South Atlantic for Costentalina vemae Scarabino, 1986 
Western South Atlantic for Crassibrachia brasiliensis Southward, 1968 
Western South Atlantic for Ctenocella hystrix (Milne Edwards & Haime, 1857) 
Western South Atlantic for Dasystenella acanthina (Wright & Studer, 1889) 

English 10-tentacle burrowing anemone for Halcampa decemtentaculata Hand, 1955
English 12-tentacle burrowing anemone for Halcampa duodecimcirrata (Sars, 1851)
English 12-tentacle parasitic anemone for Peachia parasitica (Agassiz, 1861)
English Abbott's booby for Papasula abbotti Ridgway, 1893
English aberrant toothshell for Gadila aberrans (Whiteaves, 1887)
English adhesive sea anemone for Cryptodendrum adhaesivum (Klunzinger, 1877)
English African pillow coral for Siderastrea savignyana Milne Edwards & Haime, 1849
English African squid [from synonym] for Loligo africana (Adam, 1950)
English Agassiz toothshell for Gadila agassizii (Dall, 1881)
English Alaskan anemone for Charisea saxicola Torrey, 1902
English Aleutian tern [from synonym] for Sterna aleutica Baird, 1869
English Amazon tern [from synonym] for Sterna superciliaris Vieillot, 1819
English American tuskshell for Paradentalium americanum (Chenu, 1843)
English anagolous bobtail for Sepiola affinis Naef, 1912
English ancient murrelet for Synthliboramphus antiquus (Gmelin, 1789)
English Andean gull for Larus serranus Tschudi, 1844
English Andrew's frigatebird for Fregata andrewsi Mathews, 1914
English anemone coral for Goniopora albiconus Veron, 2000
English anemone coral for Goniopora burgosi Nemenzo, 1955
English anemone coral for Goniopora cellulosa Veron, 1990
English anemone coral for Goniopora ciliatus Veron, 2000
English anemone coral for Goniopora columna Dana, 1846
English anemone coral for Goniopora djiboutiensis Vaughan, 1907
English anemone coral for Goniopora eclipsensis Veron & Pichon, 1982
English anemone coral for Goniopora fruticosa Saville-Kent, 1891
English anemone coral for Goniopora lobata Milne Edwards, 1860
English anemone coral [from synonym] for Goniopora minor Crossland, 1952
English anemone coral for Goniopora norfolkensis Veron & Pichon, 1982
English anemone coral for Goniopora palmensis Veron & Pichon, 1982
English anemone coral for Goniopora pandoraensis Veron & Pichon, 1982
English anemone coral for Goniopora pearsoni Veron, 2000
English anemone coral for Goniopora pendulus Veron, 1985
English anemone coral for Goniopora planulata (Ehrenberg, 1834)
English anemone coral for Goniopora polyformis (Zou, 1980)
English anemone coral for Goniopora savignyi Dana, 1846
English anemone coral for Goniopora somaliensis Vaughan, 1907
English anemone coral for Goniopora stokesi Milne Edwards & Haime, 1851
English anemone coral [from synonym] for Goniopora stutchburyi Wells, 1955
English anemone coral for Goniopora sultani Veron, DeVantier & Turak, 2000
English anemone coral for Goniopora tenella (Quelch, 1886)
English anemone coral for Goniopora tenuidens (Quelch, 1886)
English angel squid for Ancistroteuthis lichtensteinii (A. Férussac [in A. Férussac & d'Orbigny], 1835)
English Angola flying squid for Todarodes angolensis Adam, 1962
English angular sea whip for Pterogorgia anceps (Pallas, 1766)
English annulate sticky hydroid for Eudendrium vaginatum Allman, 1863
English annulate tuskshell for Episiphon sowerbyi (Guilding, 1834)
English Antarctic flying squid for Todarodes filippovae Adam, 1975
English Antarctic fulmar for Fulmarus glacialoides (Smith, 1840)
English Antarctic neosquid for Alluroteuthis antarcticus Odhner, 1923
English Antarctic skua [from synonym] for Catharacta antarctica (Lesson, 1831)
English Antillean tuskshell [from synonym] for Antalis antillaris (A. d'Orbigny, 1847)
English Antilles bobtail squid for Austrorossia antillensis (G. L. Voss, 1955)
English Arafura file snake for Acrochordus arafurae McDowell, 1979
English arch-beaked whale for Mesoplodon carlhubbsi Moore, 1963
English Arctic brooding anemone for Epiactis arctica (Verrill, 1868)
English Argentine shortfin squid for Illex argentinus (Castellanos, 1960)
English armed cranch squid for Galiteuthis armata Joubin, 1898
English Armenian gull for Larus armenicus Buturlin, 1934
English Arnoux's beaked whale for Berardius arnuxii Duvernoy, 1851
English artichoke coral for Scolymia cubensis (Milne Edwards & Haime, 1848)
English Ascension frigatebird for Fregata aquila (Linnaeus, 1758)
English ashy storm-petrel for Oceanodroma homochroa (Coues, 1864)
English Atlantic armhook squid for Gonatus steenstrupi Kristensen, 1981
English Atlantic banded octopus for Octopus zonatus G. L. Voss, 1968
English Atlantic bird squid for Ornithoteuthis antillarum Adam, 1957
English Atlantic bobtail for Sepiola atlantica A. d'Orbigny, 1842
English Atlantic cranch squid for Teuthowenia megalops (Prosch, 1849)
English Atlantic gonate squid for Gonatus steenstrupi Kristensen, 1981
English Atlantic hump-backed dolphin for Sousa teuszii (Kükenthal, 1892)
English Atlantic mushroom coral for Scolymia lacera (Pallas, 1766)
English Atlantic warty octopus for Scaeurgus unicirrhus (Delle Chiaje, 1841)
English Auckland chag [from synonym] for Phalacrocorax colensoi Buller, 1888
English Audouin's gull for Larus audouinii Payraudeau, 1826
English Australasian gannet for Morus serrator (Gray, 1843)
English Australian fur seal for Arctocephalus pusillus (Schreber, 1775)
English Australian pelican for Pelecanus conspicillatus Temminck, 1824
English Australian snubfin dolphin for Orcaella heinsohni Beasley, Robertson & Arnold, 2005
English banana coral for Trachyphyllia geoffroyi (Audouin, 1826)
English banded tuskshell for Antalis circumcincta (R. B. Watson, 1879)
English banded water snake for Nerodia fasciata (Linnaeus, 1766)
English band-rumped storm-petrel for Oceanodroma castro (Harcourt, 1851)
English bank cormorant for Phalacrocorax neglectus (Wahlberg, 1855)
English Bartsch's squid [from synonym] for Uroteuthis bartschi Rehder, 1945
English beaded sea anemone for Heteractis aurora (Quoy & Gaimard, 1833)
English bean coral for Euphyllia fimbriata (Spengler, 1799)
English Beck's petrel for Pseudobulweria becki (Murphy, 1928)
English Beka squid [from synonym] for Loligo beka Sasaki, 1929
English Bennetts watersnake [from synonym] for Enhydris bennetti (Gray, 1842)
English Bermuda petrel for Pterodroma cahow (Nichols & Mowbray, 1916)
English berry armhook squid for Gonatus berryi Naef, 1923
English berry tuskshell for Antalis berryi (A. G. Smith & M. Gordon, 1948)
English bigeye inshore squid [from synonym] for Loligo ocula Cohen, 1976
English big-fin bobtail squid for Rossia megaptera A. E. Verrill, 1881
English black fan-shaped hydroid for Solanderia gracilis Duchassaing & Michelin, 1846
English black jelly for Chrysaora achlyos Martin, Gershwin, Burnett, Cargo & Bloom, 1997
English black noddy for Anous minutus Boie, 1844
English black right whale for Balaena mysticetus Linnaeus, 1758
English Black Sea fan for Iciligorgia schrammi Duchassaing, 1870
English Black Sea rod for Plexaura homomalla (Esper, 1794)
English Black Sea turtle [from synonym] for Chelonia agassizii Bocourt, 1868