Between brackets is the number of accepted marine extant species
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Shows the number of accepted marine extant species within the taxon
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- Biota (247 391)
- Kingdom Animalia (211 375)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (517)
- Phylum Annelida (14 104)
- Superclass Annelida incertae sedis (204)
- Class Clitellata (1 056)
- Class Gephyrea
- Class Polychaeta (12 674)
- Subclass Aciculata accepted as Errantia
- Subclass Echiura (173)
- Subclass Errantia (6 489)
- Order Amphinomida (222)
- Order Eunicida (1 448)
- Superfamily Eunicea
- Family Arabellidae Hartman, 1944 accepted as Oenonidae Kinberg, 1865
- Family Dorvilleidae Chamberlin, 1919 (227)
- Family Eunicidae Berthold, 1827 (475)
- Genus Aciculomarphysa Hartmann-Schröder in Hartmann-Schröder & Zibrowius, 1998 (1)
- Genus Amphelothrix [misspelling of Aphelothrix] accepted as Aphelothrix Chamberlin, 1919
- Genus Amphiro Kinberg, 1865 accepted as Marphysa Quatrefages, 1866
- Genus Amphiron [misspelling of Amphiro Kinberg] accepted as Amphiro Kinberg, 1865
- Genus Aphelothrix Chamberlin, 1919 accepted as Marphysa Quatrefages, 1866
- Genus Blainvillea Quatrefages, 1866 accepted as Lysidice Lamarck, 1818
- Genus Bleinvillea [auct. misspelling for Blainvillea] accepted as Blainvillea Quatrefages, 1866
- Genus Eriphyle Kinberg, 1865 accepted as Eunice Cuvier, 1817
- Genus Eunice Cuvier, 1817 (246)
- Genus Euniphysa Wesenberg-Lund, 1949 (10)
- Genus Fauchaldius Carrera-Parra & Salazar Vallejo, 1998 (2)
- Genus Heteromarphysa Verrill, 1900
- Genus Heterophysa Shen & Wu, 1991 accepted as Euniphysa Wesenberg-Lund, 1949
- Genus Leodice Lamarck, 1818 (37)
- Genus Lithognatha Stewart, 1881 accepted as Palola Gray in Stair, 1847
- Genus Lycidice [auct. misspelling] accepted as Lysidice Lamarck, 1818
- Genus Lysibranchia Cantone, 1983
- Genus Lysidice Lamarck, 1818 (30)
- Genus Macduffia McIntosh, 1885 accepted as Marphysa Quatrefages, 1866
- Genus Marphysa Quatrefages, 1866 (88)
- Genus Mayeria Verrill, 1900 accepted as Eunice Cuvier, 1817
- Genus Nauphanta Kinberg, 1865 accepted as Marphysa Quatrefages, 1866
- Genus Nausicaa Kinberg, 1865 accepted as Marphysa Quatrefages, 1866
- Genus Nematonereis Schmarda, 1861 accepted as Lysidice Lamarck, 1818
- Genus Nereidonta Blainville, 1828 accepted as Eunice Cuvier, 1817
- Genus Nicidion Kinberg, 1865 (18)
- Species Nicidion amoureuxi (Rullier, 1974)
- Species Nicidion angeli (Carrera-Parra & Salazar-Vallejo, 1998)
- Species Nicidion brevis Ehlers, 1887 accepted as Eunice brevis (Ehlers, 1887)
- Species Nicidion cariboea (Grube, 1856)
- Species Nicidion cincta Kinberg, 1865
- Species Nicidion edentulum Ehlers, 1901 accepted as Palola edentulum (Ehlers, 1901)
- Species Nicidion fuscafasciata Treadwell, 1922
- Species Nicidion gallapagensis Kinberg, 1865 accepted as Palola edentulum (Ehlers, 1901)
- Species Nicidion gracilis Crossland, 1904 accepted as Eunice wasinensis Fauchald, 1992
- Species Nicidion hentscheli (Augener, 1931)
- Species Nicidion imogena Monro, 1924 accepted as Eunice imogena (Monro, 1924)
- Species Nicidion incerta Hansen, 1882 accepted as Eunice cariboea Grube, 1856
- Species Nicidion insularis (Nogueira, Steiner & Amaral, 2001)
- Species Nicidion kinbergi Webster, 1884 accepted as Eunice goodei Fauchald, 1992
- Species Nicidion leucodon Ehlers, 1901 accepted as Palola leucodon (Ehlers, 1901)
- Species Nicidion longicirrata Kinberg, 1865 accepted as Eunice longicirrata (Kinberg, 1865)
- Species Nicidion longula (Ehlers, 1887)
- Species Nicidion megabalanicola Hsueh & Li, 2014
- Species Nicidion mikeli (Carrera-Parra & Salazar-Vallejo, 1998)
- Species Nicidion mutilata (Webster, 1884)
- Species Nicidion notata (Treadwell, 1921)
- Species Nicidion obtusa (Verrill, 1900)
- Species Nicidion parvipes (Benham, 1927)
- Species Nicidion posteriobranchia [auctt. misspelling as 'io' for posterobranchia] accepted as Nicidion posterobranchia (Day, 1962)
- Species Nicidion posterobranchia (Day, 1962)
- Species Nicidion proppi (Averincev, 1972)
- Species Nicidion samoae (Hartmann-Schröder, 1965)
- Species Nicidion saxicola (Langerhans, 1881)
- Genus Nicidon [auctt.] accepted as Nicidion Kinberg, 1865
- Genus Palola Gray in Stair, 1847 (14)
- Genus Palolo accepted as Palola Gray in Stair, 1847
- Genus Palpiglossus Wagner, 1885
- Genus Paraeuniphysa Wu & He, 1988 accepted as Euniphysa Wesenberg-Lund, 1949
- Genus Paramarphysa Ehlers, 1887 accepted as Nicidion Kinberg, 1865
- Genus Paucibranchia Molina-Acevedo, 2018 (20)
- Genus Tibiana Lamarck, 1816 accepted as Eunice Cuvier, 1817
- Genus Treadwellphysa Molina-Acevedo & Carrera-Parra, 2017 (9)
- Family Euniphysidae Shen & Wu, 1991 accepted as Eunicidae Berthold, 1827
- Family Hartmaniellidae Imajima, 1977 (3)
- Family Iphitimidae Fauchald, 1970 accepted as Dorvilleidae Chamberlin, 1919
- Family Lumbrineridae Schmarda, 1861 (293)
- Family Lysaretidae Kinberg, 1865 accepted as Lumbrineridae Schmarda, 1861
- Family Oenonidae Kinberg, 1865 (97)
- Family Onuphidae Kinberg, 1865 (353)
- Family Pseudophyllodocidae Bidenkap, 1895 accepted as Dorvilleidae Chamberlin, 1919
- Family Staurocephalidae Kinberg, 1865 accepted as Dorvilleidae Chamberlin, 1919
- Order Phyllodocida (4 819)
- Subclass Polychaeta incertae sedis (352)
- Subclass Sedentaria (5 660)
- Order Sipuncula (170)
- Phylum Arthropoda (59 698)
- Phylum Aschelminthes
- Phylum Brachiopoda (407)
- Phylum Bryozoa (6 533)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (132)
- Phylum Chordata (24 081)
- Phylum Cnidaria (12 580)
- Phylum Ctenophora (184)
- Phylum Cycliophora (2)
- Phylum Dicyemida (122)
- Phylum Echinodermata (7 635)
- Phylum Ectoprocta accepted as Bryozoa
- Phylum Entoprocta (202)
- Phylum Gastrotricha (523)
- Phylum Gnathostomulida (100)
- Phylum Hemichordata (137)
- Phylum Kinorhyncha (348)
- Phylum Loricifera (46)
- Phylum Mesozoa accepted as Dicyemida
- Phylum Mollusca (52 012)
- Phylum Nematoda (6 758)
- Phylum Nematomorpha (5)
- Phylum Nemertea (1 332)
- Phylum Nemertina represented as Nemertea
- Phylum Nemertini accepted as Nemertea
- Phylum Orthonectida (24)
- Phylum Pentastomida accepted as Pentastomida
- Phylum Phoronida (13)
- Phylum Placozoa (4)
- Phylum Platyhelminthes (13 481)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (9 463)
- Phylum Priapulida (22)
- Phylum Rotatoria accepted as Rotifera
- Phylum Rotifera (210)
- Phylum Sipunculida accepted as Sipuncula
- Phylum Tardigrada (263)
- Phylum Xenacoelomorpha (437)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 773)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 579)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)