Between brackets is the number of accepted species
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2 Shows the number of accepted species within the taxon
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- Biota
- Kingdom Animalia
- Phylum Acanthocephala
- Phylum Agmata †
- Phylum Animalia (awaiting allocation)
- Phylum Animalia incertae sedis
- Phylum Annelida
- Class Annelida (awaiting allocation)
- Class Clitellata
- Class Machaeridia
- Class Myzostomaria
- Class Polychaeta
- Subclass Echiura
- Order Aciculata
- Order Amphinomida
- Order Amphinomorpha
- Order Athecanephria
- Order Canalipalpata
- Order Capitellida
- Order Chaetopterida
- Order Cirratulida
- Order Cossurida
- Order Ctenodrilida
- Order Dinophilida
- Order Errantida †
- Order Eunicemorpha
- Order Eunicida
- Order Flabelligerida
- Order Magelonida
- Order Myzostomida
- Order Nerillida
- Order Opheliida
- Order Orbiniida
- Order Oweniida
- Order Phyllodocemorpha
- Order Phyllodocida
- Family Acoetidae Kinberg, 1856
- Family Alciopidae Ehlers, 1864
- Family Antonbruunidae Fauchald, 1977
- Family Antonbruuniidae Auct. accepted as Antonbruunidae Fauchald, 1977
- Family Aphroditidae Malmgren, 1867
- Family Aphroditoidea (awaiting allocation)
- Family Calamyzidae Hartmann-Schröder, 1971 accepted as Syllidae Grube, 1850
- Family Chrysopetalidae Ehlers, 1864
- Family Eulepethidae Chamberlin, 1919
- Family Fossundecimidae Thompson, 1979 †
- Family Glyceridae Grube, 1850
- Family Goniadidae Kinberg, 1866
- Family Hesionidae Grube, 1850
- Family Ichthyotomidae Eisig, 1906
- Family Iopsilidae accepted as Iospilidae Bergström, 1914
- Family Iospilidae Bergström, 1914
- Family Iphionidae Kinberg, 1856
- Family Isopilidae accepted as Iospilidae Bergström, 1914
- Family Kynephoridae Ehlers, 1920 accepted as Pilargidae de Saint-Joseph, 1899
- Family Lacydoniidae Bergström, 1914
- Family Levidoridae
- Family Lopadorhynchidae accepted as Lopadorrhynchidae Claparède, 1868
- Family Lopadorrhynchidae Claparède, 1868
- Family Microphthalmidae Hartmann-Schröder, 1971
- Family Nautilinidae Miura & Laubier, 1989 accepted as Nautiliniellidae Miura & Laubier, 1990
- Family Nautiliniellidae Miura & Laubier, 1990
- Family Nephthyidae [Polychaeta, misspelling of Nephtyidae] accepted as Nephtyidae Grube, 1850
- Family Nephtyidae Grube, 1850
- Family Nereidae Savigny, 1820 accepted as Nereididae Blainville, 1818
- Family Nereididae Blainville, 1818
- Family Notophycidae Knox & Cameron, 1970 accepted as Nereididae Blainville, 1818
- Family Palmyridae Kinberg, 1858 accepted as Aphroditidae Malmgren, 1867
- Family Paralacydoniidae Pettibone, 1963
- Family Peisidicidae accepted as Pholoidae Kinberg, 1858
- Family Pholoidae Kinberg, 1858
- Family Pholoididae Fauchald, 1977 accepted as Sigalionidae Malmgren, 1867
- Family Phyllodocida incertae sedis
- Family Phyllodocidae Örsted, 1843
- Family Pilargidae de Saint-Joseph, 1899
- Family Pisionidae Southern, 1914 accepted as Sigalionidae Malmgren, 1867
- Family Polynoidae Malmgren, 1867
- Genus Abyssarya Bonifácio & Menot, 2018
- Genus Acanthicolepis McIntosh, 1900
- Genus Achloe McIntosh, 1885 accepted as Acholoe Claparède, 1870
- Genus Acholoe Claparède, 1870
- Genus Actinoe Moore, 1902 accepted as Antinoe Kinberg, 1856
- Genus Admetella McIntosh, 1885
- Genus Adyte Saint-Joseph, 1899
- Genus Agnodice McIntosh, 1885
- Genus Alenita Tauber, 1879 accepted as Alentia Malmgren, 1866
- Genus Alentia Malmgren, 1866
- Genus Alentiana Hartman, 1942
- Genus Allmaniella McIntosh, 1885
- Genus Almaniella Darboux, 1899 accepted as Allmaniella McIntosh, 1885
- Genus Andresia Prenant, 1924
- Genus Anotochaetonoe Britayev & Martin, 2005
- Genus Antarctinoe Barnich, Fiege, Micaletto & Gambi, 2006
- Genus Antinoana Hartman & Fauchald, 1971 accepted as Bylgides Chamberlin, 1919
- Genus Antinoe Kinberg, 1856
- Genus Antinoella Augener in Roemer & Schaudinn, 1928
- Genus Antinoella Malmgren, 1866 accepted as Bylgides Chamberlin, 1919
- Genus Antipathipolyeunoa Pettibone, 1991 accepted as Parahololepidella Pettibone, 1969
- Genus Antipathypolyeunoa Pettibone, 1991 accepted as Antipathipolyeunoa Pettibone, 1991
- Genus Arcteobia Annenkova, 1937
- Genus Arctonoe Chamberlin, 1920
- Genus Arctonoella Buzhinskaja, 1967
- Genus Asterophilia Hanley, 1989
- Genus Augenerilepidonotus Pettibone, 1995
- Genus Australaugeneria Pettibone, 1969
- Genus Australonoe Hanley, 1993
- Genus Austrolaenilla Bergström, 1916
- Genus Austropolaria Neal, Barnich, Wiklund & Glover, 2012
- Genus Barrukia Bergström, 1916
- Genus Bathyadmetella Pettibone, 1967
- Genus Bathybahamas Pettibone, 1985
- Genus Bathycanadia Levenstein, 1981
- Genus Bathycatalina Pettibone, 1976
- Genus Bathyedithia Pettibone, 1976
- Genus Bathyedithya Levenstein, 1981
- Genus Bathyeliasona Pettibone, 1976
- Genus Bathyfauvelia Pettibone, 1976
- Genus Bathyhololepidella Buzhinskaya, 1992
- Genus Bathykermadeca Pettibone, 1976
- Genus Bathykurila Pettibone, 1976
- Genus Bathylevensteina Pettibone, 1976
- Genus Bathylevensteinia Pettibone, 1976 accepted as Bathylevensteina Pettibone, 1976
- Genus Bathymacella Pettibone, 1976
- Genus Bathymariana Levenstein, 1978
- Genus Bathymiranda Levenstein, 1981
- Genus Bathymoorea Pettibone, 1967
- Genus Bathynoe Ditlevsen, 1917
- Genus Bathynotalia Levenstein, 1982
- Genus Bathypolaria Levenstein, 1981
- Genus Bathytasmania Levenstein, 1982
- Genus Bathyvitiazia Pettibone, 1976
- Genus Bayerpolynoe Pettibone, 1991
- Genus Benhamipolynoe Pettibone, 1976
- Genus Benhamisetosus Averintsev, 1978
- Genus Blygia
- Genus Bouchiria Wesenberg-Lund, 1949
- Genus Branchinotogluma Pettibone, 1985
- Genus Branchiopolynoe [auctt.] accepted as Branchipolynoe Pettibone, 1984
- Genus Branchiplicatus Pettibone, 1985
- Genus Branchipolynoe Miura & Hashimoto, 1991
- Genus Branchipolynoe Pettibone, 1984
- Genus Bruunilla Hartman, 1971
- Genus Brychionoe Hanley & Burke, 1991
- Genus Bylgia Théel, 1879 accepted as Bylgides Chamberlin, 1919
- Genus Bylgides Chamberlin, 1919
- Genus Caenilla Grube, 1876
- Genus Capitulatinoe Hanley & Burke, 1989
- Genus Cervilia Frickhinger, 1916
- Genus Ceuthonoe Wang, Zhou & Wang, 2021
- Genus Chaetacanthus Seidler, 1922
- Genus Chaetosphaera Haecker, 1898
- Genus Dasylepis Malmgren, 1867 accepted as Acanthicolepis McIntosh, 1900
- Genus Dilepidonotus Hartman, 1967
- Genus Diplaconotum Loshamn, 1981
- Genus Disconatis Hanley & Burke, 1988
- Genus Driechiopsis Støp-Bowitz, 1991
- Genus Drieschella Augener & Pettibone, 1970
- Genus Drieschia Michaelsen, 1892
- Genus Drieschiopsis Støp-Bowitz, 1991
- Genus Enipo Malmgren, 1866
- Genus Eucranta Malmgren, 1866
- Genus Eucrante Malmgren, 1867 accepted as Eucranta Malmgren, 1866
- Genus Eucrantia Baird, 1865 accepted as Eucranta Malmgren, 1866
- Genus Eulagisca McIntosh, 1885
- Genus Eumolphe Risso, 1826
- Genus Eunoa Verrill, 1879
- Genus Eunoe Malmgren, 1866
- Genus Eunoë Malmgren, 1865 accepted as Eunoe Malmgren, 1866
- Genus Euphione McIntosh, 1885
- Genus Euphionella Monro, 1936
- Genus Eupolynoe McIntosh, 1874
- Genus Eupolynoe Bidenkap, 1894 accepted as Neopolynoe Loshamn, 1981
- Genus Evarne Malmgren, 1866 accepted as Harmothoe Kinberg, 1856
- Genus Evarnella Chamberlin, 1919 accepted as Harmothoe Kinberg, 1856
- Genus Frenna Chamberlin, 1919 accepted as Frennia Viguier, 1912
- Genus Frennia Viguier, 1912
- Genus Gastroceratella Darboux, 1899
- Genus Gastrolepidia Schmarda, 1861
- Genus Gathyana Farquhar, 1907 accepted as Gattyana McIntosh, 1897
- Genus Gattyana McIntosh, 1897
- Genus Gaudichaudius Pettibone, 1986
- Genus Gesiella Pettibone, 1976
- Genus Gorekia Bergström, 1916
- Genus Gorgoniapolynae Pettibone, 1991
- Genus Gorgoniapolynoe Pettibone, 1991
- Genus Grubeopolynoe Pettibone, 1969
- Genus Halosydna Kinberg, 1856
- Genus Halosydnella Hartman, 1938
- Genus Halosydnopsis Uschakov & Wu, 1959
- Genus Halosydra Quatrefages in Quatrefages (Vaillant), 1866 accepted as Halosydna Kinberg, 1856
- Genus Harmatoe Wagner, 1885 accepted as Harmothoe Kinberg, 1856
- Genus Harmatoë Wagner, 1885 accepted as Harmothoe Kinberg, 1856
- Genus Harmopsides Chamberlin, 1919
- Genus Harmothoe Kinberg, 1856
- Genus Harmothoë Kinberg, 1855 accepted as Harmothoe Kinberg, 1856
- Genus Hartmania Pettibone, 1955
- Genus Hemilepidia Schmarda, 1861
- Genus Herdmanella Darboux, 1899
- Genus Hermadion Kinberg, 1856
- Genus Hermadionella Uschakov, 1982
- Genus Hermenia Grube, 1856
- Genus Hermilepidonotus Uschakov, 1974
- Genus Hesperonoe Chamberlin, 1919
- Genus Heteralentia Hanley & Burke, 1991
- Genus Heteropolynoe Bidenkap, 1907
- Genus Heteropolynoë Bidenkap, 1907 accepted as Heteropolynoe Bidenkap, 1907
- Genus Hodor Bonifácio & Menot, 2018
- Genus Hololepida Willey, 1905
- Genus Hololepida Moore, 1905
- Genus Hololepidella Willey, 1905
- Genus Hololepidia Willey, 1905
- Genus Hylosydna
- Genus Hylosynda Moore, 1903 accepted as Halosydna Kinberg, 1856
- Genus Hyperhalosydna Augener, 1922
- Genus Intoshella Darboux, 1899
- Genus Iphionea Gérard, 1845 accepted as Iphione Kinberg, 1856
- Genus Kermadecella Darboux, 1899
- Genus Kristianides Salazar-Silva, 2020
- Genus Laenilla Malmgren, 1866 accepted as Harmothoe Kinberg, 1856
- Genus Lagisca Malmgren, 1866
- Genus Langerhansia McIntosh, 1885 accepted as Intoshella Darboux, 1899
- Genus Lanilla Baird, 1865
- Genus Lenilla Malaquin, 1890
- Genus Lepidametria Webster, 1879
- Genus Lepidasthenia Malmgren, 1867
- Genus Lepidastheniella Monro, 1924
- Genus Lepidofimbra accepted as Lepidofimbria Hartman, 1967
- Genus Lepidofimbria Hartman, 1967
- Genus Lepidogyra Hartman, 1967
- Genus Lepidononotus Retzius, 1857 accepted as Lepidonotus Leach, 1816
- Genus Lepidonopsis Pettibone, 1977
- Genus Lepidonota de Blainville, 1823 accepted as Lepidonotus Leach, 1816
- Genus Lepidonote Örsted, 1842 accepted as Lepidonotus Leach, 1816
- Genus Lepidonotopodium Pettibone, 1983
- Genus Lepidonotus Leach, 1816
- Genus Leucia Malmgren, 1867
- Genus Levensteiniella Pettibone, 1985
- Genus Lobopelma Hanley, 1987
- Genus Lucopia Pillai, 1965
- Genus Macella Averincev, 1972 accepted as Bathymacella Pettibone, 1976
- Genus Macellicephala McIntosh, 1885
- Genus Macellicephaloides Ushakov, 1955
- Genus Macelloides Ushakov, 1957
- Genus Malmgrenia McIntosh, 1874
- Genus Malmgreniella Hartman, 1967
- Genus Medioantenna Imajima, 1997
- Genus Melaenis Malmgren, 1866
- Genus Meloenis Darboux, 1899 accepted as Melaenis Malmgren, 1866
- Genus Monoclea Costa, 1867
- Genus Monocolea Costa, 1862 accepted as Malmgreniella Hartman, 1967
- Genus Natopolynoe Pettibone, 1985
- Genus Nectochaeta Marenzeller, 1892 accepted as Lepidasthenia Malmgren, 1867
- Genus Nemidia Malmgren, 1866
- Genus Neobylgides Pettibone, 1993
- Genus Neohololepidella Pettibono, 1969
- Genus Neolagisca Barnich & Fiege, 2000
- Genus Neopolynoe Loshamn, 1981
- Genus Ngchia Farquhar, 1907 accepted as Gattyana McIntosh, 1897
- Genus Nonparahalosydna Imajima, 1997
- Genus Nu Bonifácio & Menot, 2018
- Genus Nychia Malmgren, 1865 accepted as Gattyana McIntosh, 1897
- Genus Nyciha Malaquin, 1890 accepted as Gattyana McIntosh, 1897
- Genus Olgalepidonotus Pettibone, 1995
- Genus Oligolepis Levinsen, 1887
- Genus Ophthalmonoe Petersen & Britayev, 1997
- Genus Opisthotrochopodus Pettibone, 1985 accepted as Branchinotogluma Pettibone, 1985
- Genus Parabathynoe Pettibone, 1990
- Genus Paradyte Pettibone, 1969
- Genus Paraeulagisca Pettibone, 1997
- Genus Paragattyana Pettibone, 1993
- Genus Parahalosydna Horst, 1915
- Genus Parahalosydnopsis Pettibone, 1977
- Genus Parahololepidella Pettibone, 1969
- Genus Paralentia Uschakov, 1982
- Genus Paralepidonotus Horst, 1915
- Genus Paranychia Czerniavsky, 1882
- Genus Parapolyeunoa Barnich, Gambi & Fiege, 2012
- Genus Parapolynoe Czerniavsky, 1882
- Genus Pararctonoella Pettibone, 1996
- Genus Pareulagisca Pettibone, 1997
- Genus Parmenis Malmgren, 1867 accepted as Malmgrenia McIntosh, 1874
- Genus Peinaleopolynoe Desbruyères & Laubier, 1988
- Genus Pelagomacellicephala Pettibone, 1985
- Genus Penaleopolynoe Desbruyères & Laubier, 1988
- Genus Perolepis Ehlers, 1908
- Genus Pettibonesia Nemésio, 2006
- Genus Phyllantinoe McIntosh, 1876
- Genus Phyllohartmania Pettibone, 1961
- Genus Phyllosheila Pettibone, 1961
- Species Phyllosheila wigleyi Pettibone, 1961
- Genus Physalidonotus Ehlers, 1904 accepted as Euphione McIntosh, 1885
- Genus Plotolepis Chamberlin, 1919
- Genus Podarmus Chamberlin, 1919
- Genus Polaruschakov Pettibone, 1976
- Genus Polinoe Risso, 1826
- Genus Polyeunoa McIntosh, 1885
- Genus Polyeunoe auct. [misspelling] accepted as Polyeunoa McIntosh, 1885
- Genus Polynoa Carrington, 1865 accepted as
- Genus Polynoe Lamarck, 1818
- Genus Polynoella McIntosh, 1885
- Genus Polynoëlla McIntosh, 1885 accepted as Polynoella McIntosh, 1885
- Genus Polynoina Nolte, 1936
- Genus Pottsiscalisetosus Pettibone, 1969
- Genus Pseudohalosydna Fauvel, 1913
- Genus Pseudopolynoe Day, 1962
- Genus Quetieria Viguier, 1911
- Genus Robertianella McIntosh, 1885
- Genus Rullieriella Pettibone, 1993
- Genus Russellhanleya Barnich, Sun & Fiege, 2004
- Genus Scalesetosus Moore, 1903 accepted as Scalisetosus McIntosh, 1885
- Genus Scalisetosus McIntosh, 1885
- Genus Sheila Monro, 1930
- Genus Showapolynoe Imajima, 1997
- Genus Showascalisetosus Imajima, 1997
- Genus Sinantenna Hartmann-Schröder, 1974
- Genus Subadyte Pettibone, 1969
- Genus Telodrieschia Kirkegaard, 1995
- Genus Telodrischia Kirkegaard, 1996
- Genus Telolepidasthenia Augener & Pettibone, 1970
- Genus Tenonia Nichols, 1969
- Genus Thermopolynoe Miura, 1994
- Genus Thormora Baird, 1865
- Genus Tottonpolynoe Pettibone, 1991
- Genus Tricosmochaeta Morgera, 1918
- Genus Uncopolynoe Hartmann-Schröder, 1960
- Genus Vampiropolynoe Marcus & Hourdez, 2002
- Genus Verrucapelma Hanley & Burke, 1991
- Genus Webbnesia Núñez, Barnich & Monterroso, 2022
- Genus Weberia Horst, 1915 accepted as Bathynoe Ditlevsen, 1917
- Genus Wilsoniella Pettibone, 1993 accepted as Pettibonesia Nemésio, 2006
- Genus Yodanoe Bonifácio & Menot, 2018
- Genus Ysideria Ruff in Blake, Hilbig & Scott, 1995
- Family Polyodontidae Buchanan, 1894 accepted as Acoetidae Kinberg, 1856
- Family Pontodoridae Bergström, 1914
- Family Sigalionidae Malmgren, 1867
- Family Sphaerodoridae Malmgren, 1867
- Family Syllidae Grube, 1850
- Family Talehsapiidae Misra, 1999 accepted as Pilargidae de Saint-Joseph, 1899
- Family Tomopteridae Johnston, 1865
- Family Typhloscolecidae Uljanin, 1878
- Family Yndolaciidae Støp-Bowitz, 1987
- Order Poeobiida
- Order Polychaeta (awaiting allocation)
- Order Polychaeta incertae sedis
- Order Polygordiida
- Order Protodrilida
- Order Psammodrilida
- Order Pseudocirratulida
- Order Sabellida
- Order Scolecida
- Order Serpulimorpha
- Order Spintherida
- Order Spiomorpha
- Order Spionida
- Order Sternaspida
- Order Terebellida
- Order Terebellomorpha
- Order Thecanephria
- Genus Echinokleptus Muir, Botting, Lefebvre, Upton & Zhang, 2019 †
- Genus Kootenayscolex Nanglu & Caron, 2018 †
- Family Lobatocerebridae Rieger, 1980
- Genus Aulozoon Gehling & Runnegar, 2022 †
- Genus Gabavermis Troppenz, 2013 †
- Genus Lapillitubus Belaústegui & Belaústegui, 2017 †
- Genus Meanderovaleichnus Cónsole-Gonella & Aceñolaza, 2014 †
- Genus Shaihuludia Kimmig, LaVine, Schiffbauer, Egenhoff, Shelton & Leibach, 2023 †
- Genus Spitiprion Tonarová, Suttner, & Hints, 2024 †
- Genus Taonurus Saporta & Marion, 1881 †
- Genus Xiaoshibachaeta Yang, Aguado, Yang & Bleidorn, 2024 †
- Phylum Arthropoda
- Phylum Brachiopoda
- Phylum Bryozoa
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Phylum Cnidaria
- 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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