• Abyssoprimnoa gemina Cairns, 2015
• Acabaria abyssicola Kükenthal, 1909 (uncertain > unassessed)
• Acabaria africana (Kükenthal, 1908) accepted as Melithaea africana (Kükenthal, 1908)
• Acabaria amboinensis Hentschel, 1903 accepted as Melithaea amboinensis (Hentschel, 1903)
• Acabaria andamanensis van Ofwegen, 1987 accepted as Melithaea andamanensis (van Ofwegen, 1987)
• Acabaria australis (Gray, 1868) accepted as Melithaea australis (Gray, 1868)
• Acabaria baladea Grasshoff, 1999 accepted as Melithaea baladea (Grasshoff, 1999)
• Acabaria bicolor (Nutting, 1908) accepted as Melithaea bicolor (Nutting, 1908)
• Acabaria biserialis Kükenthal, 1908 accepted as Melithaea biserialis (Kükenthal, 1908)
• Acabaria capensis (Studer, 1878) accepted as Melithaea capensis (Studer, 1878)
• Acabaria cinquemiglia Grasshoff, 1999 accepted as Melithaea cinquemiglia (Grasshoff, 1999)
• Acabaria confusum (Moroff, 1902) accepted as Melithaea japonica (Verrill, 1865)
• Acabaria corymbosa Kükenthal, 1908 accepted as Melithaea corymbosa (Kükenthal, 1908)
• Acabaria crosslandi Stiasny, 1938 accepted as Acabaria splendens (Thomson & McQueen, 1908) accepted as Melithaea splendens (Thomson & McQueen, 1908)
• Acabaria dakini Thorpe, 1928 (uncertain > nomen dubium)
• Acabaria delicata Hickson, 1940 accepted as Melithaea delicata (Hickson, 1940)
• Acabaria divaricata Gray, 1859 accepted as Melithaea divaricata (Gray, 1859)
• Acabaria erythaea accepted as Acabaria erythraea (Ehrenberg, 1834) accepted as Melithaea erythraea (Ehrenberg, 1834)
• Acabaria erythraea (Ehrenberg, 1834) accepted as Melithaea erythraea (Ehrenberg, 1834)
• Acabaria flabellum (Thomson & Mackinnon, 1910) accepted as Melithaea flabellum (Thomson & Mackinnon, 1910)
• Acabaria formosa Nutting, 1911 accepted as Melithaea formosa (Nutting, 1911)
• Acabaria formosum (Moroff, 1902) accepted as Melithaea japonica (Verrill, 1865)
• Acabaria fragilis (Wright & Studer, 1889) accepted as Melithaea fragilis (Wright & Studer, 1889)
• Acabaria frondosa (Brundin, 1896) accepted as Melithaea frondosa (Brundin, 1896)
• Acabaria furcata (J.S. Thomson, 1916) accepted as Melithaea furcata (J.S. Thomson, 1916)
• Acabaria gracillima (Ridley, 1884) accepted as Melithaea gracillima (Ridley, 1884)
• Acabaria habereri Kükenthal, 1908 accepted as Melithaea habereri (Kükenthal, 1908)
• Acabaria haddoni Hickson, 1937 accepted as Melithaea haddoni (Hickson, 1937)
• Acabaria hicksoni Nutting, 1911 accepted as Melithaea hicksoni (Nutting, 1911)
• Acabaria japonica (Verrill, 1865) accepted as Melithaea japonica (Verrill, 1865)
• Acabaria kuea Grasshoff, 1999 accepted as Melithaea kuea (Grasshoff, 1999)
• Acabaria laevis (Wright & Studer, 1889) accepted as Melithaea laevis (Wright & Studer, 1889)
• Acabaria mabahissi Hickson, 1940 accepted as Melithaea mabahissi (Hickson, 1940)
• Acabaria mangyshlakensis Kusmicheva, 1980 †
• Acabaria modesta Kükenthal, 1908 accepted as Melithaea modesta (Kükenthal, 1908)
• Acabaria nodosa Wright & Studer, 1889 accepted as Melithaea nodosa (Wright & Studer, 1889)
• Acabaria nuttingi Hickson, 1937 accepted as Melithaea nuttingi (Hickson, 1937)
• Acabaria ouvea Grasshoff, 1999 accepted as Melithaea ouvea (Grasshoff, 1999)
• Acabaria philippinensis (Wright & Studer, 1889) accepted as Melithaea philippinensis (Wright & Studer, 1889)
• Acabaria planoregularis Kükenthal, 1909 accepted as Melithaea planoregularis (Kükenthal, 1909)
• Acabaria pulchra Hickson, 1937 accepted as Melithaea pulchra (Hickson, 1937)
• Acabaria ramulosa Kükenthal, 1909 accepted as Melithaea ramulosa (Kükenthal, 1909)
• Acabaria robusta (Shann, 1912) accepted as Melithaea robusta (Shann, 1912)
• Acabaria rosea Tixier-Durivault, 1954 (uncertain > unassessed)
• Acabaria rubeola (Wright & Studer, 1889) accepted as Melithaea rubeola (Wright & Studer, 1889)
• Acabaria rubra Esper, 1789 accepted as Melithaea rubra (Esper, 1789)
• Acabaria serrata Ridley, 1884 accepted as Melithaea serrata (Ridley, 1884)
• Acabaria sinaica Grasshoff, 2000 accepted as Melithaea sinaica (Grasshoff, 2000)
• Acabaria splendens (Thomson & McQueen, 1908) accepted as Melithaea splendens (Thomson & McQueen, 1908)
• Acabaria squarrosa Kükenthal, 1909 accepted as Melithaea squarrosa (Kükenthal, 1909)
• Acabaria tenuis Kükenthal, 1908 accepted as Melithaea tenuis (Kükenthal, 1908)
• Acabaria triangulata Nutting, 1911 accepted as Melithaea triangulata (Nutting, 1911)
• Acabaria undulata Kükenthal, 1908 accepted as Melithaea undulata (Kükenthal, 1908)
• Acabaria valdiviae Kükenthal, 1908 accepted as Melithaea valdiviae (Kükenthal, 1908)
• Acabaria variabilis (Hickson, 1905) accepted as Melithaea variabilis (Hickson, 1905)
• Acabaria variabilis (Thomson & Henderson, 1906) accepted as Melithaea hendersoni Reijnen, McFadden, Hermanlimianto & van Ofwegen, 2014
• Acalycigorgia angustiflora Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia angustiflora Kükenthal & Gorzawsky, 1908
• Acalycigorgia ceylonensis (Thomson & Henderson, 1905) accepted as Acanthogorgia ceylonensis Thomson & Henderson, 1905
• Acalycigorgia densiflora Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia densiflora (Kükenthal & Gorzawsky, 1908)
• Acalycigorgia dofleini Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia dofleini Kükenthal & Gorzawsky, 1908
• Acalycigorgia gracillima Kükenthal, 1909 accepted as Acanthogorgia gracillima Kükenthal, 1908
• Acalycigorgia grandiflora Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia grandiflora (Kükenthal & Gorzawsky, 1908)
• Acalycigorgia incrustata (Kükenthal, 1919) accepted as Acanthogorgia incrustata Kükenthal, 1919
• Acalycigorgia inermis (Hedlund, 1890) accepted as Acanthogorgia inermis Hedlund, 1890
• Acalycigorgia irregularis Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia irregularis (Kükenthal & Gorzawsky, 1908)
• Acalycigorgia japonica Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia japonica Kükenthal & Gorzawsky, 1908
• Acalycigorgia multispina Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia multispina Kükenthal & Gorzawsky, 1908
• Acalycigorgia paradoxa Nutting, 1912 accepted as Acanthogorgia paradoxa Nutting, 1912
• Acalycigorgia procera (Moroff, 1902) accepted as Acanthogorgia procera (Moroff, 1902)
• Acalycigorgia radians Kükenthal & Gorzawsky, 1908 accepted as Acanthogorgia radians (Kükenthal & Gorzawsky, 1908)
• Acalycigorgia sibogae Stiasny, 1943 accepted as Acanthogorgia sibogae (Stiasny, 1947)
• Acalycigorgia sibogae Stiasny, 1947 accepted as Acanthogorgia sibogae (Stiasny, 1947)
• Acalycigorgia spissa Kükenthal, 1909 accepted as Acanthogorgia spissa Kükenthal, 1908
• Acalycigorgia vegae Aurivillius, 1931 accepted as Acanthogorgia vegae Aurivillius, 1931
• Acalycigorgia wireni Aurivillius, 1931 accepted as Acanthogorgia wireni (Aurivillius, 1931)
• Acamptogorgia acanthostoma Germanos, 1895 accepted as Villogorgia acanthostoma (Germanos, 1895)
• Acamptogorgia alternans Wright & Studer, 1889 accepted as Villogorgia alternans (Wright & Studer, 1889)
• Acamptogorgia arbuscula (Gray MS in Wright & Studer, 1889) accepted as Villogorgia arbuscula (Gray MS in Wright & Studer, 1889)
• Acamptogorgia atra Thomson & Henderson, 1905 accepted as Villogorgia atra (Thomson & Henderson, 1905)
• Acamptogorgia bebrycoides (von Koch, 1887) accepted as Villogorgia bebrycoides (von Koch, 1887)
• Acamptogorgia ceylonensis (Thomson & Henderson, 1905) accepted as Villogorgia ceylonensis (Thomson & Henderson, 1905)
• Acamptogorgia circium Thomson & Henderson, 1906 accepted as Villogorgia circium (Thomson & Henderson, 1906)
• Acamptogorgia foliata Thomson & Russell, 1909 accepted as Villogorgia foliata (Thomson & Russell, 1909)
• Acamptogorgia fruticosa Germanos, 1895 accepted as Villogorgia fruticosa (Germanos, 1895)
• Acamptogorgia gracilis Thomson, 1905 accepted as Villogorgia gracilis (Thomson, 1905)
• Acamptogorgia horrida Hickson, 1905 accepted as Echinomuricea horrida (Hickson, 1905)
• Acamptogorgia rubra Thomson, 1905 accepted as Villogorgia rubricata Ramvilas, Alderslade & Ranjeet, 2023
• Acamptogorgia spatulata Nutting, 1910 accepted as Villogorgia spatulata (Nutting, 1910)
• Acamptogorgia spinosa Hiles (uncertain > taxon inquirendum)
• Acamptogorgia spinosa Hiles, 1899 accepted as Echinomuricea spinosa (Hiles, 1899)
• Acamptogorgia tenuis Thomson & Simpson, 1909 accepted as Villogorgia tenuis (Thomson & Simpson, 1909)
• Acamptogorgia tuberculata Hiles, 1899 accepted as Villogorgia tuberculata (Hiles, 1899)
• Acanella africana Kükenthal, 1915
• Acanella arbuscula (Johnson, 1862)
• Acanella aurelia Heestand Saucier & France, 2017
• Acanella chiliensis Wright & Studer, 1889
• Acanella dispar Bayer, 1990
• Acanella eburnea (Pourtalès, 1868) accepted as Acanella arbuscula (Johnson, 1862)
• Acanella furcata Thomson, 1929
• Acanella gigliolii Cecchini, 1914 accepted as Isidella elongata (Esper, 1788)