Between brackets is the number of accepted species
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2 Shows the number of accepted species within the taxon
3 The last expanded taxon is highlighted
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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
- Subclass Errantia
- Order Aciculata
- Order Amphinomorpha
- Order Athecanephria
- Order Canalipalpata
- Order Capitellida
- Order Chaetopterida
- Order Cirratulida
- Order Cossurida
- Order Ctenodrilida
- Order Dinophilida
- Order Errantida †
- Order Eunicemorpha
- Order Flabelligerida
- Order Magelonida
- Order Myzostomida
- Order Nerillida
- Order Opheliida
- Order Orbiniida
- Family Ariciidae accepted as Orbiniidae Hartman, 1942
- Family Orbiniidae Hartman, 1942
- Genus Alcandra Kinberg, 1866 accepted as Scoloplos Blainville, 1828
- Genus Anthostoma Schmarda, 1861 accepted as Naineris Blainville, 1828
- Genus Anthostomum Schmarda, 1861
- Genus Anthostonia McIntosh, 1904
- Genus Archiaricia Czerniavsky, 1881
- Genus Aricia Savigny, 1822 accepted as Orbinia Quatrefages, 1866
- Genus Aricicia Quatrefages, 1866 accepted as Orbinia Quatrefages, 1866
- Genus Arycia Berthold in Latreille, 1827 accepted as Orbinia Quatrefages, 1866
- Genus Atricia Chenu, 1855-58 accepted as Orbinia Quatrefages, 1866
- Genus Berkeleya Hartman, 1971
- Genus Berkeleya auct. [misspelling] accepted as Berkeleyia Hartman, 1971
- Genus Berkeleyia Hartman, 1971
- Genus Branchethus Chamberlin, 1919 accepted as Scoloplos Blainville, 1828
- Genus Branchetus Chamberlin, 1919
- Genus Califia Hartman, 1957
- Genus Clytie Grube, 1855
- Genus Falklandiella Hartman, 1967 accepted as Orbiniella Day, 1954
- Genus Gesaschroederella Blake, 2021
- Genus Haploscoloplos Monro, 1933 accepted as Scoloplos Blainville, 1828
- Genus Labotas Kinberg, 1866 accepted as Scoloplos Blainville, 1828
- Genus Labotos accepted as Scoloplos Blainville, 1828
- Genus Labotus Whitelegge, 1889
- Genus Lacides Claparède, 1869
- Genus Lacydes Kinberg, 1866 accepted as Naineris Blainville, 1828
- Genus Leitoscoloplos Day, 1977
- Genus Leitoscoplos accepted as Leitoscoloplos Day, 1977
- Genus Leodamas Kinberg, 1866
- Genus Leodamas Ehlers, 1901
- Genus Leodamos Czerniavsky, 1881
- Genus Methanoaricia Blake, 2000
- Genus Microbinia
- Genus Microrbinia Hartman, 1965
- Species Microrbinia linea Hartman, 1965
- Species Microrbinia lineata
- Genus Naidonereis Agassiz, 1846 accepted as Naineris Blainville, 1828
- Genus Naidonereis auct. accepted as Naineris Blainville, 1828
- Genus Naidoneris Malmgren, 1867
- Genus Naidoneris Webster & Benedict, 1887 accepted as Naineris Blainville, 1828
- Genus Nainereis Grube, 1850 accepted as Naineris Blainville, 1828
- Genus Nainereis [auctt.] accepted as Naineris Blainville, 1828
- Genus Naineris Blainville, 1828
- Genus Orbinia Quatrefages, 1866
- Genus Orbiniella Day, 1954
- Genus Palaeoscoloplos Knaust, 2021 †
- Genus Paraorbiniella Rullier, 1974
- Genus Pararicia Solís-Weiss & Fauchald, 1989 accepted as Protoariciella Hartmann-Schroder, 1962
- Genus Pettibonella Solís-Weiss & Fauchald, 1989
- Genus Phylo Kinberg, 1866
- Genus Polynaineris Pettibone, 1957
- Genus Porcia Grube, 1859
- Genus Portia Langerhans, 1880
- Genus Proscoloplos Day, 1954
- Genus Protoaricia Czerniavsky, 1881
- Genus Protoariciella Hartmann-Schroder, 1962
- Genus Protoscoloplos Czerniavsky, 1881
- Genus Questa Hartman, 1966
- Genus Schroederella Laubier, 1962
- Genus Sclopolos accepted as Scoloplos Blainville, 1828
- Genus Scolaricia Eisig, 1914 accepted as Scoloplos Blainville, 1828
- Genus Scolophos Norman, 1897 accepted as Scoloplos Blainville, 1828
- Genus Scolople Westwood in Blyth, 1840 accepted as Scoloplos Blainville, 1828
- Genus Scoloplella Day, 1963
- Genus Scoloplos Blainville, 1828
- Genus Scoloplosia Rullier, 1972
- Genus Scoloplus Schmarda, 1871 accepted as Scoloplos Blainville, 1828
- Genus Scolopus Lucas, 1840 accepted as Scoloplos Blainville, 1828
- Genus Teodisca Quatrefages in Quatrefages (Vaillant), 1866
- Genus Theodisca Müller, 1858 accepted as Naineris Blainville, 1828
- Genus Theodisea Wagner, 1885
- Genus Uncorbinia Hartmann-Schröder & Hartmann, 1979
- Order Oweniida
- Order Phyllodocemorpha
- 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 †
- Genus Pseudoarenicola Liu & Yang, 1991 †
- 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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