Between brackets is the number of accepted species
1 Click on "-" to collapse/hide all child taxa
2 Shows the number of accepted species within the taxon
3 The last expanded taxon is highlighted
4 Click on "+" to expand/show all child taxa
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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
- Family Chaetopteridae Audouin & Milne Edwards, 1833
- Genus Chaeopterus Sars, 1853 accepted as Chaetopterus Cuvier, 1830
- Genus Chaetopteros McMurtrie in Cuvier, 1834 accepted as Chaetopterus Cuvier, 1830
- Genus Chaetopterus Cuvier, 1830
- Genus Chatopterus Hansen, 1878 accepted as Chaetopterus Cuvier, 1830
- Genus Chetopteris Jourdain, 1867 accepted as Chaetopterus Cuvier, 1830
- Genus Chetopterus Sars, 1835 accepted as Chaetopterus Cuvier, 1830
- Genus Chetopterus Audouin & Milne-Edwards, 1833 accepted as Chaetopterus Cuvier, 1830
- Genus Choetopterus Griffith in Cuvier, 1833 accepted as Chaetopterus Cuvier, 1830
- Genus Leptochaetopterus Berkeley, 1927 accepted as Spiochaetopterus M. Sars, 1856
- Genus Mesochaetopterus Potts, 1914
- Genus Mesotrocha Leuckart & Pagenstecher in Leuckart, 1855
- Genus Phyllochactopterus Gravier, 1905 accepted as Phyllochaetopterus Grube, 1863
- Genus Phyllochaetopreus [auctt. misspelling] accepted as Phyllochaetopterus Grube, 1863
- Genus Phyllochaetopteris Matthew, 1899 accepted as Phyllochaetopterus Grube, 1863
- Genus Phyllochaetopterus Grube, 1863
- Genus Phyllochoetopterus Quatrefages in Quatrefages, 1866 accepted as Phyllochaetopterus Grube, 1863
- Genus Ranzania Claparède, 1870 accepted as Mesochaetopterus Potts, 1914
- Genus Ranzanides Chamberlin, 1919 accepted as Mesochaetopterus Potts, 1914
- Genus Sasekumaria Rullier, 1976 accepted as Mesochaetopterus Potts, 1914
- Genus Spiochaetopteras Packard, 1866 accepted as Spiochaetopterus M. Sars, 1856
- Genus Spiochaetopterus M. Sars, 1856
- Species Spiochaetopterus bergensis Gitay, 1969
- Species Spiochaetopterus costarum (Claparède, 1869)
- Species Spiochaetopterus creoceanae Bhaud, Martin & Gil, 2003
- Species Spiochaetopterus herdmani Hornell in Willey, 1905 accepted as Phyllochaetopterus herdmani (Hornell in Willey, 1905)
- Species Spiochaetopterus izuensis Nishi, Bhaud & Koh, 2004
- Species Spiochaetopterus koreana Bhaud, Koh & Hong, 2002
- Species Spiochaetopterus madeirensis Langerhans, 1881
- Species Spiochaetopterus nonatoi Bhaud & Petti, 2001
- Species Spiochaetopterus oculatus Webster, 1879
- Species Spiochaetopterus okinawaensis Nishi & Bhaud, 2000
- Species Spiochaetopterus patagonicus Kinberg, 1866
- Species Spiochaetopterus sagamiensis Nishi, Miura & Bhaud, 1999
- Species Spiochaetopterus sanbanzensis Nishi, Bhaud & Koh, 2004
- Species Spiochaetopterus sesokoensis Nishi & Bhaud, 2000
- Species Spiochaetopterus solitarius (Rioja, 1917)
- Species Spiochaetopterus tropicus Grube, 1877
- Species Spiochaetopterus typicus M. Sars, 1856
- Genus Spiochetopterus Quatrefages in Quatrefages (Vaillant), 1866 accepted as Spiochaetopterus M. Sars, 1856
- Genus Telepsavus Costa, 1861 accepted as Spiochaetopterus M. Sars, 1856
- Genus Tricaetia McIntosh, 1904
- Genus Tricelia Renier, 1804
- Genus Tricellia Nardo, 1847
- Genus Tricoelia Renier, 1804 accepted as Chaetopterus Cuvier, 1830
- 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
- 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 Taonurus Saporta & Marion, 1881 †
- 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 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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