Between brackets is the number of accepted species
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- Biota
- Kingdom Animalia
- Phylum Acanthocephala
- Phylum Agmata †
- Phylum Animalia (awaiting allocation)
- Phylum Animalia incertae sedis
- Phylum Annelida
- Phylum Arthropoda
- Phylum Brachiopoda
- Phylum Bryozoa
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Phylum Cnidaria
- Subphylum Anthozoa
- Class Hexacorallia
- Class Octocorallia
- Order Gorgonacea accepted as Octocorallia
- Order Malacalcyonacea
- Family Acanthoaxiidae van Ofwegen & McFadden, 2010
- Family Acanthogorgiidae Gray, 1859
- Family Acrophytidae McFadden & van Ofwegen, 2017
- Family Acrossotidae Bourne, 1914
- Family Alcyonidae accepted as Alcyoniidae Lamouroux, 1812
- Family Alcyoniidae Lamouroux, 1812
- Family Anthogorgiidae McFadden, van Ofwegen & Quattrini, 2024
- Family Anthothelidae Broch, 1916 accepted as Alcyoniidae Lamouroux, 1812
- Family Aquaumbridae Breedy, van Ofwegen & Vargas, 2012
- Family Arulidae McFadden & Ofwegen, 2012
- Family Asterospiculariidae Utinomi, 1951 accepted as Xeniidae Ehrenberg, 1828
- Family Astrogorgiidae McFadden, van Ofwegen & Quattrini, 2024
- Family Astrospiculariidae accepted as Asterospiculariidae Utinomi, 1951
- Family Capnellidae McFadden, van Ofwegen & Quattrini, 2024
- Family Carijoidae McFadden, van Ofwegen & Quattrini, 2024
- Family Cerveridae McFadden, van Ofwegen & Quattrini, 2024
- Family Cladiellidae McFadden, van Ofwegen & Quattrini, 2024
- Family Clavulariidae Hickson, 1894
- Family Coelogorgiidae Bourne, 1900
- Family Corymbophytidae McFadden & van Ofwegen, 2017
- Family Discophytidae McFadden, van Ofwegen & Quattrini, 2024
- Family Eunicellidae McFadden, van Ofwegen & Quattrini, 2024
- Family Euplexauridae McFadden, van Ofwegen & Quattrini, 2024
- Family Gorgoniidae Lamouroux, 1812
- Family Incrustatidae McFadden, van Ofwegen & Quattrini, 2024
- Family Isididae Lamouroux, 1812
- Family Keroeididae Kinoshita, 1910
- Family Lemnaliidae Gray, 1869
- Family Leptophytidae McFadden & van Ofwegen, 2017
- Family Maasellidae Poche, 1914 accepted as Paralcyoniidae Gray, 1869
- Family Malacacanthidae McFadden, van Ofwegen & Quattrini, 2024
- Family Melithaeidae Gray, 1870
- Family Melitodidae accepted as Melithaeidae Gray, 1870
- Family Muriceidae accepted as Plexauridae Gray, 1859
- Family Nephtheidae Gray, 1862
- Genus Chromonephthea van Ofwegen, 2005
- Genus Coronephthya Utinomi, 1966
- Genus Coronephthya Utinomi, 1962 accepted as Coronephthya Utinomi, 1966
- Genus Dendronephthya Kükenthal, 1905
- Species Dendronephthya acaulis Kükenthal, 1906
- Species Dendronephthya aculeata Kükenthal, 1905
- Species Dendronephthya agaricoides Henderson, 1909
- Species Dendronephthya alba Utinomi, 1952
- Species Dendronephthya albogilva Henderson, 1909
- Species Dendronephthya alcocki Thomson & Henderson, 1906
- Species Dendronephthya alexanderi Nutting, 1908
- Species Dendronephthya amaebisclera Thomson & Dean, 1931
- Species Dendronephthya ambigua Henderson, 1909
- Species Dendronephthya andamanensis Henderson, 1909
- Species Dendronephthya andersoni Henderson, 1909
- Species Dendronephthya anguina Wright & Studer, 1889
- Species Dendronephthya annectens Sherriffs, 1922
- Species Dendronephthya arakanensis Henderson, 1909
- Species Dendronephthya arborea May, 1899
- Species Dendronephthya arbuscula Henderson, 1909
- Species Dendronephthya argentea Kükenthal, 1905
- Species Dendronephthya armata Holm, 1895
- Species Dendronephthya armifer Thomson & Dean, 1931
- Species Dendronephthya aruensis Kükenthal, 1910
- Species Dendronephthya aspera Tixier-Durivault & Prevor, 1960
- Species Dendronephthya aurantiaca Thomson & Henderson, 1906
- Species Dendronephthya aurea Utinomi, 1952
- Species Dendronephthya aurora Ridley, 1887
- Species Dendronephthya australis Kükenthal, 1905
- Species Dendronephthya biformata Harrison, 1908
- Species Dendronephthya binongkoensis Verseveldt, 1966
- Species Dendronephthya boletiformis Ridley, 1887
- Species Dendronephthya bonnieri Verseveldt, 1960
- Species Dendronephthya booleyi Henderson, 1909
- Species Dendronephthya boschmai Verseveldt, 1966
- Species Dendronephthya brachycaulos Henderson, 1909
- Species Dendronephthya brevirama Burchardt, 1898
- Species Dendronephthya bruuni Verseveldt & van Ofwegen, 1991
- Species Dendronephthya caerula Kükenthal, 1905
- Species Dendronephthya candida Pütter, 1900
- Species Dendronephthya carnea Wright & Studer, 1889
- Species Dendronephthya castanea Utinomi, 1952
- Species Dendronephthya celosia Lesson, 1834 accepted as Spongodes celiosa (Lesson, 1834)
- Species Dendronephthya cervicornus Wright & Studer, 1889
- Species Dendronephthya chimnoi Harrison, 1908
- Species Dendronephthya cirsium Kükenthal, 1905
- Species Dendronephthya clara Tixier-Durivault & Prevor, 1960
- Species Dendronephthya clavata Kükenthal, 1905
- Species Dendronephthya cocosiensis Henderson, 1909
- Species Dendronephthya colemani Verseveldt, 1977
- Species Dendronephthya collaris Wright & Studer, 1889
- Species Dendronephthya colombiensis Henderson, 1909
- Species Dendronephthya composita Tixier-Durivault & Prevor, 1962
- Species Dendronephthya conica Henderson, 1909
- Species Dendronephthya coronata Wright & Studer, 1889
- Species Dendronephthya costatorubra Henderson, 1909
- Species Dendronephthya crassa Tixier-Durivault & Prevor, 1960
- Species Dendronephthya crosslandi Thomson & Henderson, 1906
- Species Dendronephthya crystallina Henderson, 1909
- Species Dendronephthya curvata Kükenthal, 1905
- Species Dendronephthya decipiens Henderson, 1909
- Species Dendronephthya decussatospinosa Utinomi, 1952
- Species Dendronephthya delicatissima Henderson, 1909
- Species Dendronephthya dendritica Utinomi, 1954
- Species Dendronephthya dendrophyta Wright & Studer, 1889
- Species Dendronephthya densa Kükenthal, 1906
- Species Dendronephthya depressa Kükenthal, 1895
- Species Dendronephthya devexa Tixier-Durivault & Prevor, 1960
- Species Dendronephthya dichotoma Henderson, 1909
- Species Dendronephthya disciformis Kükenthal, 1905
- Species Dendronephthya divaricata Gray, 1862
- Species Dendronephthya doederleini Kükenthal, 1905
- Species Dendronephthya dofleini Kükenthal, 1905
- Species Dendronephthya dollfusi Tixier-Durivault & Prevor, 1962
- Species Dendronephthya dromidicola Utinomi, 1952
- Species Dendronephthya eburnea Kükenthal, 1905
- Species Dendronephthya echinata Tixier-Durivault & Prevor, 1959
- Species Dendronephthya ehrenbergi Kükenthal, 1904
- Species Dendronephthya electa Tixier-Durivault & Prevor, 1962
- Species Dendronephthya elegans Harrison, 1908
- Species Dendronephthya elegans Henderson, 1909
- Species Dendronephthya elongata Henderson, 1909
- Species Dendronephthya erinacea Kükenthal, 1905
- Species Dendronephthya fallax Tixier-Durivault & Prevor, 1962
- Species Dendronephthya featherensis Verseveldt, 1977
- Species Dendronephthya filigrana Kükenthal, 1906
- Species Dendronephthya fischeri Tixier-Durivault & Prevor, 1960
- Species Dendronephthya flabellifera Studer, 1888
- Species Dendronephthya flammea Sherriffs, 1922
- Species Dendronephthya flava May, 1899
- Species Dendronephthya florida Esper, 1791
- Species Dendronephthya foliata Henderson, 1909
- Species Dendronephthya folifera Pütter, 1900
- Species Dendronephthya formosa Gravier, 1908
- Species Dendronephthya fragilis Tixier-Durivault & Prevor, 1960
- Species Dendronephthya furcata Utinomi, 1952
- Species Dendronephthya fusca Studer, 1894
- Species Dendronephthya ganjamensis Henderson, 1909
- Species Dendronephthya gardineri Thomson & Mackinnon, 1909
- Species Dendronephthya gigantea Verrill, 1864
- Species Dendronephthya gilva Henderson, 1909
- Species Dendronephthya gloriosa Utinomi, 1952
- Species Dendronephthya golgotha Utinomi, 1952
- Species Dendronephthya gracillima Kükenthal, 1905
- Species Dendronephthya grandiflora Henderson, 1909
- Species Dendronephthya gravieri Kükenthal, 1910
- Species Dendronephthya gregoriensis Henderson, 1909
- Species Dendronephthya griffini Roxas, 1933
- Species Dendronephthya guggenheimi Roxas, 1933
- Species Dendronephthya habereri Kükenthal, 1905
- Species Dendronephthya hadzii Tixier-Durivault & Prevor, 1959
- Species Dendronephthya halterosclera Thomson & Dean, 1931
- Species Dendronephthya harrisoni Henderson, 1909
- Species Dendronephthya hartmeyeri Kükenthal, 1903
- Species Dendronephthya hemprichi Klunzinger, 1877
- Species Dendronephthya heterocyathus Wright & Studer, 1889
- Species Dendronephthya hicksoni Kükenthal, 1905
- Species Dendronephthya hirsuta Tixier-Durivault & Prevor, 1960
- Species Dendronephthya hyalina Kükenthal, 1905
- Species Dendronephthya hystricosa Verseveldt & van Ofwegen, 1991
- Species Dendronephthya inconfusa Tixier-Durivault & Prevor, 1962
- Species Dendronephthya inermis Henderson, 1909
- Species Dendronephthya inhacaensis Verseveldt, 1960
- Species Dendronephthya intermedia Thomson & Dean, 1931 accepted as Chromonephthea intermedia (Thomson & Dean, 1931)
- Species Dendronephthya investigata Tixier-Durivault & Prevor, 1962
- Species Dendronephthya involuta Kükenthal, 1895
- Species Dendronephthya irregularis Henderson, 1909
- Species Dendronephthya japonica Kükenthal, 1905
- Species Dendronephthya jucunda Tixier-Durivault & Prevor, 1960
- Species Dendronephthya klunzingeri (Studer, 1888)
- Species Dendronephthya koellikeri Kükenthal, 1905
- Species Dendronephthya kukenthali Gravier, 1908
- Species Dendronephthya kukenthali Thomson & Henderson, 1906
- Species Dendronephthya lanxifera Holm, 1895
- Species Dendronephthya latipes Tixier-Durivault & Prevor, 1960
- Species Dendronephthya laxa Wright & Studer, 1889
- Species Dendronephthya lokobeensis Verseveldt
- Species Dendronephthya longicaulis Kükenthal, 1905
- Species Dendronephthya longispina Henderson, 1909
- Species Dendronephthya lutea Kükenthal, 1905
- Species Dendronephthya macrocaulis Henderson, 1909
- Species Dendronephthya macrospina Wright & Studer, 1889
- Species Dendronephthya magna Tixier-Durivault & Prevor, 1960
- Species Dendronephthya magnacantha Nutting, 1912
- Species Dendronephthya malabarensis Henderson, 1909
- Species Dendronephthya malaya Roxas, 1933
- Species Dendronephthya manyanensis Roxas, 1933
- Species Dendronephthya marenzelleri Kükenthal, 1905
- Species Dendronephthya masoni Henderson, 1909
- Species Dendronephthya maxima Kükenthal, 1905
- Species Dendronephthya mayi (Kükelthal, 1904)
- Species Dendronephthya merguiensis Henderson, 1909
- Species Dendronephthya mertoni Kükenthal, 1910
- Species Dendronephthya mexicana Kükenthal, 1905
- Species Dendronephthya michaelseni Kükenthal, 1910
- Species Dendronephthya microspiculata Pütter, 1900
- Species Dendronephthya minima Verseveldt, 1966
- Species Dendronephthya mirabilis (Tixier-Durivault & Prevorsek, 1962)
- Species Dendronephthya miriabilis Henderson, 1909
- Species Dendronephthya mirifica Tixier-Durivault, 1972
- Species Dendronephthya mollis Holm, 1895
- Species Dendronephthya monticulosa Wright & Studer, 1889
- Species Dendronephthya mortenseni Tixier-Durivault & Prevor, 1959
- Species Dendronephthya moseri Roxas, 1933
- Species Dendronephthya mucronata (Pütier, 1900)
- Species Dendronephthya multispinosa Henderson, 1909
- Species Dendronephthya mutabilis Tixier-Durivault & Prevor, 1962
- Species Dendronephthya natalensis Tixier-Durivault & Prevor, 1960
- Species Dendronephthya nicobarensis Henderson, 1909
- Species Dendronephthya nigrescens Kükenthal, 1905
- Species Dendronephthya nigripes Nutting, 1912
- Species Dendronephthya nigrotincta Ridley, 1887
- Species Dendronephthya nipponica Utinomi, 1952
- Species Dendronephthya noumeensis Verseveldt, 1974
- Species Dendronephthya novaezeelandiae Kükenthal, 1905
- Species Dendronephthya obtusa Henderson, 1909
- Species Dendronephthya ochracea Henderson, 1909
- Species Dendronephthya orientalis Henderson, 1909
- Species Dendronephthya ovata Henderson, 1909
- Species Dendronephthya oviformis Nutting, 1912
- Species Dendronephthya padavensis Henderson, 1909
- Species Dendronephthya palaoensis Utinomi, 1952
- Species Dendronephthya pallida Henderson, 1909
- Species Dendronephthya palmata Utinomi, 1952
- Species Dendronephthya parvula Henderson, 1909
- Species Dendronephthya pectinata Holm, 1895
- Species Dendronephthya pectinata Song, 1976
- Species Dendronephthya pellucida Henderson, 1909
- Species Dendronephthya pentagona Henderson, 1909
- Species Dendronephthya persica Henderson, 1909
- Species Dendronephthya pharonis Thomson & Macqueen, 1911
- Species Dendronephthya planoregularis Burchardt, 1898
- Species Dendronephthya puetteri Kükenthal, 1905
- Species Dendronephthya pulchella Utinomi, 1952
- Species Dendronephthya pulchra Thomson & Henderson, 1905
- Species Dendronephthya pumilio Studer, 1888
- Species Dendronephthya punctata Kükenthal, 1906
- Species Dendronephthya punicea Studer, 1888
- Species Dendronephthya purpurea Henderson, 1909
- Species Dendronephthya pustulosa Wright & Studer, 1889
- Species Dendronephthya pyriformis Verseveldt & van Ofwegen, 1991
- Species Dendronephthya quadrata Henderson, 1909
- Species Dendronephthya querciformis Kükenthal, 1906
- Species Dendronephthya radiata Kükenthal, 1905
- Species Dendronephthya ramulosa Gray, 1862
- Species Dendronephthya regia Verseveldt, 1968
- Species Dendronephthya repens Kükenthal, 1905
- Species Dendronephthya reticulata Thomson & Dean, 1931
- Species Dendronephthya revelata Tixier-Durivault & Prevor, 1962
- Species Dendronephthya rigida Studer, 1888
- Species Dendronephthya robusta Kükenthal, 1895
- Species Dendronephthya roemeri Kükenthal, 1911
- Species Dendronephthya rosamondae Boone, 1938
- Species Dendronephthya rosea Kükenthal, 1895
- Species Dendronephthya rubeola Henderson, 1909
- Species Dendronephthya rubescens Harrison, 1908
- Species Dendronephthya rubescens Thomson & Dean, 1931
- Species Dendronephthya rubra May, 1899
- Species Dendronephthya savignyi Ehrenberg, 1843
- Species Dendronephthya semperi Studer, 1888
- Species Dendronephthya simplex Sherriffs, 1922
- Species Dendronephthya sinaiensis Verseveldt, 1971
- Species Dendronephthya sinensis Pütter, 1900
- Species Dendronephthya snelliusi Verseveldt, 1966
- Species Dendronephthya speciosa Kükenthal, 1905
- Species Dendronephthya spinifera (Holm, 1895)
- Species Dendronephthya spinosa Gray, 1862
- Species Dendronephthya spinulosa Gray, 1862
- Species Dendronephthya spissa Tixier-Durivault & Prevor, 1962
- Species Dendronephthya spongiosa Tixier-Durivault & Prevor, 1959
- Species Dendronephthya staphyloidea Verseveldt & van Ofwegen, 1991
- Species Dendronephthya stockci Verseveldt, 1968
- Species Dendronephthya stolonifera May, 1899
- Species Dendronephthya studeri Ridley, 1884
- Species Dendronephthya suensoni Holm, 1895
- Species Dendronephthya suesiana Thomson & Macqueen, 1907
- Species Dendronephthya suluensis Verseveldt, 1966
- Species Dendronephthya surugaensis Imahara, 1977
- Species Dendronephthya tabaensis Verseveldt & Cohen, 1971
- Species Dendronephthya tenera Holm, 1895
- Species Dendronephthya tenuis Tixier-Durivault & Prevor, 1960
- Species Dendronephthya thomsoni Harrison, 1908
- Species Dendronephthya thuja Henderson, 1909
- Species Dendronephthya tixierae d'Hondt, 1977
- Species Dendronephthya translucens Henderson, 1909
- Species Dendronephthya tripartita Henderson, 1909
- Species Dendronephthya tuberculata Utinomi, 1952
- Species Dendronephthya uliginosa Thomson & Henderson, 1906
- Species Dendronephthya umbellata Wright & Studer, 1889
- Species Dendronephthya utinomii Tixier-Durivault & Prevor, 1959
- Species Dendronephthya variata Henderson, 1909
- Species Dendronephthya varicolor Henderson, 1909
- Species Dendronephthya vervoorti Verseveldt & van Ofwegen, 1991
- Species Dendronephthya villosa Kükenthal, 1905
- Species Dendronephthya waitei Thomson & Mackinnon, 1911
- Species Dendronephthya weberi Verseveldt, 1966
- Species Dendronephthya wijsmanae Verseveldt, 1974
- Species Dendronephthya yamamotoi Utinomi, 1954
- Species Dendronephthya zanzibarensis Thomson & Henderson, 1906
- Genus Dendronepththya accepted as Dendronephthya Kükenthal, 1905
- Genus Dufa
- Genus Krystallophanes Danielssen, 1887 accepted as Gersemia Marenzeller, 1877
- Genus Lithophyton accepted as Litophyton Forskål, 1775
- Genus Lithophytum Kükenthal, 1903 accepted as Litophyton Forskål, 1775
- Genus Litophyton Forskål, 1775
- Genus Neospongodes Kükenthal, 1903
- Genus Nephtea Agassiz, 1845 accepted as Nephthea Audouin in Savigny, 1826
- Genus Nephthea Audouin in Savigny, 1826 accepted as Litophyton Forskål, 1775
- Genus Nephthya Ehrenberg, 1834 accepted as Nephthea Audouin in Savigny, 1826
- Genus Nephthya Gervais, 1840 accepted as Nephthea Audouin in Savigny, 1826
- Genus Nephthys Audouin, 1827 accepted as Nephthea Audouin in Savigny, 1826
- Genus Nephthys Gistl, 1848 accepted as Nephthea Audouin in Savigny, 1826
- Genus Nephtya Van Beneden, 1867 accepted as Nephthea Audouin in Savigny, 1826
- Genus Neptaea Blainville, 1830 accepted as Nephthea Audouin in Savigny, 1826
- Genus Nepthya Hickson, 1884 accepted as Nephthea Audouin in Savigny, 1826
- Genus Orexia Gistl, 1848 accepted as Nephthea Audouin in Savigny, 1826
- Genus Pacifiphyton Williams, 1997
- Genus Scleronephthya Studer, 1887
- Genus Spoggodes Milne-Edwards, 1857 accepted as Spongodes Lesson, 1831
- Genus Spongodes Lesson, 1831 accepted as Dendronephthya Kükenthal, 1905
- Genus Spongodia Agassiz, 1846 accepted as Spongodes Lesson, 1831
- Genus Stereonephthya Kükenthal, 1905
- Genus Umbellulifera Thomson & Dean, 1931
- Family Nephthyidae [Cnidaria, misspelling of Nephtheidae] accepted as Nephtheidae Gray, 1862
- Family Nephthyigorgiidae McFadden, van Ofwegen & Quattrini, 2024
- Family Nidaliidae Gray, 1869
- Family Paralcyoniidae Gray, 1869
- Family Paramuriceidae Bayer, 1956
- Family Plexaurellidae Verrill, 1912
- Family Plexauridae Gray, 1859
- Family Pseudonephtheidae McFadden, van Ofwegen & Quattrini, 2024
- Family Pterogorgiidae McFadden, van Ofwegen & Quattrini, 2024
- Family Rosgorgiidae McFadden, van Ofwegen & Quattrini, 2024
- Family Sarcophytidae Gray, 1869
- Family Scleracidae McFadden, van Ofwegen & Quattrini, 2024
- Family Sinulariidae McFadden, van Ofwegen & Quattrini, 2024
- Family Siphonogorgiidae Kölliker, 1874
- Family Skamnariidae McFadden, van Ofwegen & Quattrini, 2024
- Family Subergorgiidae Gray, 1859
- Family Taiaroidae Bayer & Muzik, 1976
- Family Telestidae Milne Edwards & Haime, 1857 accepted as Tubiporidae Ehrenberg, 1828
- Family Tubiporidae Ehrenberg, 1828
- Family Victorgorgiidae Moore, Alderslade & Miller, 2017
- Family Viguieriotidae Bayer, 1954 accepted as Paralcyoniidae Gray, 1869
- Family Xeniidae Ehrenberg, 1828
- Genus Alaskagorgia Sánchez & Cairns, 2004
- Genus Calcigorgia Broch, 1935
- Genus Cryogorgia Williams, 2005
- Genus Cyclomuricea Nutting, 1908
- Genus Elenanthus Sanamyan & Sanamyan, 2020
- Genus Filigella Gray, 1868 accepted as Thesea Duchassaing & Michelotti, 1860
- Genus Pseudothelogorgia van Ofwegen, 1994
- Genus Sueciatractos Reich & Kutscher, 2023 †
- Genus Thesea Duchassaing & Michelotti, 1860
- Order Pennatulacea accepted as Scleralcyonacea
- Order Scleralcyonacea
- Order Stolonifera accepted as Malacalcyonacea
- Family Haimeidae Wright, 1865
- Family Pseudogorgiidae Utinomi & Harada, 1973
- Family Waiparaconidae Buckeridge, 1993 †
- Genus Aspera Dautova, 2018
- Genus Axogaster Lonsdale in Dixon, 1850 †
- Genus Bayergorgia Williams & López-González, 2005
- Genus Briareopsis Bayer, 1993
- Genus Caliacis Deichmann, 1936
- Genus Canarya Ocaña & van Ofwegen, 2003
- Genus Catenatus Carrera, Voldman, Mango & Nestell, 2021 †
- Genus Ceratocaulon Jungersen, 1892
- Genus Chalcogorgia Bayer, 1949
- Genus Chengjiangopenna Shu & Conway Morris, 2006 †
- Genus Chirobelemnon Pfeffer, 1887
- Genus Chondronephthya Utinomi, 1960
- Genus Daniela Koch, 1891
- Genus Dendrogorgia Duchassaing, 1870
- Genus Denhartogia Ocaña & van Ofwegen, 2003
- Genus Distichogorgia Bayer, 1979
- Genus Elasma Wright & Studer, 1887 accepted as Elasmogorgia Wright & Studer, 1889
- Genus Elasmogorgia Wright & Studer, 1889
- Genus Eogorgia Hickson, 1938 †
- Genus Flagelligorgia Cairns & Cordeiro, 2017
- Genus Hookerella Gray, 1870
- Genus Hypnogorgia Duchassaing & Michelotti, 1864
- Genus Inflatocalyx Verseveldt & Bayer, 1988
- Genus Lafustalcyon Denayer, Poty, Tourneur & Aretz, 2023 †
- Genus Lanthanocephalus Williams & Starmer, 2000
- Genus Lignopsis Pérez & Zamponi, 2000
- Genus Mesogligorgia López-González, 2007
- Genus Moolabalia Alderslade, 2001
- Genus Ojeda Duchassaing & Michelotti, 1860
- Genus Pachysceptron Haas, 1909 †
- Genus Paramoltkia Löser, 1996 †
- Genus Petilavenula Cope, 2005 †
- Genus Phrontis Duchassaing, 1870
- Genus Proheliopora Kuz'micheva, 1975 †
- Genus Pseudocladochonus Versluys, 1907
- Genus Pseudosuberia Kükenthal, 1919
- Genus Pseudothesea Kükenthal, 1919
- Genus Raynerella Gray, 1869
- Genus Rhipidella Gray, 1870
- Genus Rolandia de Lacaze-Duthiers, 1900
- Genus Sarcogorgia Gray, 1857
- Genus Scleranthelia Studer, 1878
- Genus Skleranthelia Studer, 1879 accepted as Scleranthelia Studer, 1878
- Genus Speirogorgia Williams, 2019
- Genus Sphaeralcyon López-González & Gili, 2005
- Genus Stereogorgia Kükenthal, 1916
- Genus Stereosoma Hickson, 1930
- Genus Sydella Gray, 1873
- Genus Termieralcyon Fernández-Martínez, Coronado, Rodríguez, Tourneur & Badpa, 2019 †
- Genus Tesseranthelia Bayer, 1981
- Genus Thelogorgia Bayer, 1991
- Genus Tubigorgia Pasternak, 1985
- Genus Verseveldtia Williams, 1990
- Genus Williamsium Moore, Alderslade & Miller, 2017
- Genus Xenogorgia Bayer & Muzik, 1976
- Order Alcyonacea accepted as Octocorallia
- Order Anthozoa (awaiting allocation)
- Order Anthozoa incertae sedis
- Order Auloporida †
- Order Cambroctoconida †
- Order Coenothecalia accepted as Scleralcyonacea
- Order Cothoniida †
- Order Cystiphyllida †
- Order Favositida †
- Order Gastraxonacea accepted as Octocorallia
- Order Heliolitida †
- Order Helioporacea accepted as Scleralcyonacea
- Order Heterocorallia †
- Order Hexacorallia (awaiting allocation)
- Order Lichenariida †
- Order Lyndaphylonacea †
- Order Numidiaphyllida †
- Order Proporida †
- Order Protoalcyonaria accepted as Malacalcyonacea
- Order Rugosa †
- Order Sarcinulida †
- Order Scleromorpharia †
- Order Stauriida †
- Order Tabulaconida †
- Order Tabulata †
- Order Telestacea accepted as Malacalcyonacea
- Order Trachypsammiacea †
- Family Pseudocladochonidae accepted as Octocorallia
- Subphylum Medusozoa incertae sedis
- Subphylum Myxozoa
- Class Cnidaria (awaiting allocation)
- Class Cubozoa
- Class Cyclozoa
- Class Hydroconozoa †
- Class Hydrozoa
- Class Protomedusae †
- Class Scyphozoa
- Class Staurozoa
- Order Melanoskleritoitidea †
- Family Hiemaloriidae Fedonkin, 1985 †
- Genus Euzebiola Sommer, 1954 † accepted as Sphenothallus Hall, 1847 †
- Genus Hallotheca Bouček, 1936 † accepted as Sphenothallus Hall, 1847 †
- Genus Pennalina Cope, 2005 †
- Genus Pywackia Landing in Landing, English & Keppie, 2010 †
- Genus Rhizostromella Parona in Parona, Crema & Prever, 1909 †
- Genus Sphenothallus Hall, 1847 †
- Phylum Ctenophora
- Phylum Cycliophora
- Phylum Cycloneuralia incertae sedis
- Phylum Ecdysozoa incertae sedis †
- Phylum Echinodermata
- Phylum Entoprocta
- Phylum Gastrotricha
- Phylum Gnathostomulida
- Phylum Hemichordata
- Phylum Hyolitha †
- Phylum Kinorhyncha
- Phylum Lobopoda †
- Phylum Loricifera
- Phylum Micrognathozoa
- Phylum Mollusca
- Phylum Monoblastozoa accepted as Animalia incertae sedis
- Phylum Nematoda
- Phylum Nematomorpha
- Phylum Nemertea
- Phylum Onychophora
- Phylum Orthonectida
- Phylum Phoronida
- Phylum Placozoa
- Phylum Platyhelminthes
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera
- Phylum Priapula accepted as Priapulida
- Phylum Priapulida
- Phylum Problematica † accepted as Animalia incertae sedis
- Phylum Rhombozoa
- Phylum Rotifera
- Phylum Scalidophora incertae sedis
- Phylum Sipuncula
- Phylum Tardigrada
- Phylum Trace fossils †
- Phylum Vendobionta †
- Phylum Vestimentifera accepted as Siboglinidae Caullery, 1914
- Phylum Vetulicolia †
- Phylum Vinctiplicata incertae sedis †
- Phylum Xenacoelomorpha
- Genus Trilobocaris Pribyl, 1953 †
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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