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
- Phylum Arthropoda
- Phylum Brachiopoda
- Phylum Bryozoa
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Subphylum Cephalochordata
- Subphylum Tunicata accepted as Urochordata
- Subphylum Urochordata
- Subphylum Vertebrata
- Superclass Tetrapoda
- Class Acanthodii †
- Class Actinopterygii
- Order Acanthomorpha
- Order Acipenseriformes
- Order Actinopterygii (awaiting allocation)
- Order Actinopterygii incertae sedis
- Order Aeduelliformes †
- Order Albuliformes
- Order Alepisauriformes
- Order Amiiformes
- Order Anguilliformes
- Order Ankylophoriformes †
- Order Argentiniformes
- Order Asarotiformes †
- Order Ascalaboidiformes †
- Order Aspidorhynchiformes †
- Order Ateleopodiformes
- Order Atheriniformes
- Order Aulopiformes
- Order Batrachoidiformes
- Order Beloniformes
- Order Beryciformes
- Order Bobasatraniformes † accepted as Bobasatraniiformes †
- Order Bobasatraniiformes †
- Order Catervarioliformes †
- Order Cephaloxeniformes †
- Order Cetomimiformes
- Order Characiformes
- Order Cheirolepiformes †
- Order Clupeiformes
- Order Clupeocephala incertae sedis
- Order Clupeomorpha incertae sedis
- Order Crossognathiformes †
- Order Ctenothrissiformes †
- Order Cypriniformes
- Family Balitoridae Swainson, 1839
- Genus Annamia Hora, 1932
- Genus Balitora Gray, 1830
- Genus Balitoropsis Smith, 1945
- Genus Beaufortia Hora, 1932
- Genus Bhavania Hora, 1920
- Genus Bhawania accepted as Bhavania Hora, 1920
- Species Bhawania australis (Jerdon, 1849) accepted as Bhavania australis (Jerdon, 1849)
- Genus Chopraia Prashad & Mukerji, 1929 accepted as Homaloptera van Hasselt, 1823
- Genus Crossostoma Sauvage, 1878
- Genus Cryptotora Kottelat, 1998
- Genus Diardichthys Roberts, 1998 accepted as Sewellia Hora, 1932
- Genus Dienbienia Nguyen & Nguyen, 2002
- Genus Erromyzon Kottelat, 2004
- Genus Formosania Oshima, 1919
- Genus Formosiana accepted as Crossostoma Sauvage, 1878
- Genus Gastromyzon Günther, 1874
- Genus Ghatsa Randall & Page, 2015
- Genus Glaniopsis Boulenger, 1899
- Genus Helgia Vinciguerra, 1890 accepted as Homaloptera van Hasselt, 1823
- Genus Hemimyzon Regan, 1911
- Genus Hemimzon accepted as Hemimyzon Regan, 1911
- Genus Homaloptera van Hasselt, 1823
- Genus Homalopteroides Fowler, 1905
- Genus Homalopterula Fowler, 1940
- Genus Homalosoma Boulenger, 1901
- Genus Hypergastromyzon Roberts, 1989
- Genus Jinshaia Kottelat & Chu, 1988
- Genus Katibasia Kottelat, 2004
- Genus Labigastromyzon Tang & Chen, 1996 accepted as Pseudogastromyzon Nichols, 1925
- Genus Lepidoglanis Vaillant, 1889 accepted as Gastromyzon Günther, 1874
- Genus Lepturichthys Regan, 1911
- Genus Limparhomaloptera Fang, 1935 accepted as Liniparhomaloptera Fang, 1935
- Genus Liniparhomaloptera Fang, 1935
- Genus Linipaxhomaloptera accepted as Liniparhomaloptera Fang, 1935
- Genus Metahomaloptera Chang, 1944
- Genus Micronoemacheilus Rendahl, 1944
- Genus Neoastromyzon accepted as Neogastromyzon Popta, 1905
- Genus Neogastromyzon Popta, 1905
- Genus Neohomaloptera Herre, 1944
- Genus Noemacheilus Kuhl & van Hasselt in van Hasselt, 1823 accepted as Nemacheilus Bleeker, 1863
- Genus Nun Banarescu & Nalbant in Banarescu, Nalbant & Goren, 1982 accepted as Oxynoemacheilus Banarescu & Nalbant, 1966
- Genus Oreias Sauvage, 1874 accepted as Schistura McClelland, 1838
- Genus Paraprotomyzon Pellegrin & Fang, 1935
- Genus Parasewellia Nguyen & Nguyen in Nguyen, 2005
- Genus Parhomaloptera Vaillant, 1902
- Genus Plesiomyzon Zheng & Chen, 1980
- Genus Praeformosania Fang, 1935 accepted as Homalosoma Boulenger, 1901
- Genus Progastromyzon Hora & Jayaram, 1952 accepted as Protomyzon Hora, 1932
- Genus Protomyzon Hora, 1932
- Genus Pseudogastromyzon Nichols, 1925
- Genus Pseudohomaloptera Silas, 1953
- Genus Sewellia Hora, 1932
- Genus Sinogastromyzon Fang, 1930
- Genus Sinohomaloptera Fang, 1930
- Genus Travancoria Hora, 1941
- Genus Vanmanenia Hora, 1932
- Genus Yaoshania Yang, Kottelat, Yang & Chen, 2012
- Family Barbuccidae Kottelat, 2012
- Family Botiidae Berg, 1940 accepted as Cobitidae Swainson, 1838
- Family Catostomidae Agassiz, 1850
- Family Cobitidae Swainson, 1838
- Family Cobitididae Gunther, 1868 accepted as Cobitidae Swainson, 1838
- Family Cyprinidae Rafinesque, 1815
- Family Cypriniformes (awaiting allocation)
- Family Ellopostomatidae Bohlen & Šlechtová, 2009
- Family Gastromyzontidae Fowler, 1905
- Family Gyrinocheilidae Gill, 1905
- Family Homalopteridae Bleeker, 1859 accepted as Balitoridae Swainson, 1839
- Family Jianghanichthyidae Liu, Chang, Wilson & Murray, 2015 †
- Family Nemacheilidae Regan, 1911
- Family Psilorhynchidae Hora, 1926
- Family Serpenticobitidae Kottelat, 2012
- Family Vaillantellidae Nalbant & Bănărescu, 1977
- Order Cyprinodontiformes
- Order Dactylopteriformes accepted as Syngnathiformes
- Order Dapediiformes †
- Order Discordichthyiformes †
- Order Dorsetichthyiformes †
- Order Dorypteriformes †
- Order Ellimmichthyiformes †
- Order Elonichthyiformes †
- Order Elopiformes
- Order Esociformes
- Order Eurynotoidiformes †
- Order Euteleostei incertae sedis
- Order Gadiformes
- Order Gasterosteiformes
- Order Gobiesociformes
- Order Gobiiformes
- Order Gonorhynchiformes accepted as Gonorynchiformes
- Order Gonorynchiformes
- Order Guildayichthyiformes †
- Order Gymnotiformes
- Order Halecomorphi incertae sedis
- Order Haplolepidiformes †
- Order Holocentriformes
- Order Ichthyodectiformes †
- Order Ionoscopiformes †
- Order Kyphosichthyiformes †
- Order Lampriformes
- Order Lepisosteiformes
- Order Leptolepidiformes †
- Order Lophiiformes
- Order Louwoichthyiformes †
- Order Luganoiiformes †
- Order Lycopteriformes †
- Order Macrosemiiformes †
- Order Megalopiformes accepted as Elopiformes
- Order Mormyriformes accepted as Osteoglossiformes
- Order Myctophiformes
- Order Neopterygii incertae sedis
- Order Notacanthiformes
- Order Ophidiiformes
- Order Ophiopsiformes †
- Order Ophisthomi †
- Order Osmeriformes
- Order Osteoglossiformes
- Order Osteoglossomorpha incertae sedis
- Order Pachycormiformes †
- Order Palaeonisciformes †
- Order Palaeoniscimorpha incertae sedis
- Order Palaeoniscoidea † accepted as Palaeonisciformes †
- Order Paleonisciformes † accepted as Palaeonisciformes †
- Order Panxianichthyformes †
- Order Paphosisciformes †
- Order Parasemionotiformes †
- Order Pattersonichthyiformes †
- Order Peltopleuriformes †
- Order Perciformes
- Order Percomorpha incertae sedis
- Order Percopsiformes
- Order Perleidiformes †
- Order Pholidophoriformes †
- Order Pholidophoroidea † accepted as Pholidophoriformes †
- Order Pholidopleuriformes †
- Order Pleuronectiformes
- Order Polymixiiformes
- Order Prohaleciteiformes †
- Order Protacanthopterygii incertae sedis
- Order Ptycholepiformes †
- Order Pycnodontiformes †
- Order Redfieldiiformes †
- Order Saccopharyngiformes
- Order Salmoniformes
- Order Saurichthyiformes †
- Order Scanilepiformes †
- Order Scorpaeniformes
- Order Semionotiformes †
- Order Siluriformes
- Order Sorbininardiformes †
- Order Stephanoberyciformes
- Order Stomiiformes
- Order Synbranchiformes
- Order Syngnathiformes
- Order Tarrasiiformes †
- Order Teleostei incertae sedis
- Order Teleostii (awaiting allocation)
- Order Tetraodontiformes
- Order Tselfatiformes accepted as Tselfatiiformes †
- Order Tselfatiiformes †
- Order Zeiformes
- Genus Avitosmerus Fielitz, 2002 †
- Genus Avonichthys Wilson, Pardo & Anderson, 2018 †
- Genus Bacchiaichthys Bannikov & Sorbini, 2000 †
- Genus Bethesdaichthys Bender, 2001 †
- Genus Bluefieldius Mickle, 2018 †
- Genus Choctawichthys Schwarzhans & Stringer in Stringer et al., 2020 †
- Genus Cladistia Cope, 1870
- Genus Diplospondichthys Filleul & Dutheil, 2004 †
- Genus Fuyuanichthys Xu, Ma & Ren, 2018 †
- Genus Gwyneddocaris Bock, 1946 †
- Genus Otolithopsis Huddleston, 1983 †
- Genus Otolithus Koken, 1884 † accepted as Otolithopsis Huddleston, 1983 †
- Class Agnatha (awaiting allocation)
- Class Cephalaspidomorphi
- Class Chondrichthyes
- Class Conodonta †
- Class Dipnoi
- Class Dipnomorpha accepted as Dipnoi
- Class Galeaspida †
- Class Gnathostomata incertae sedis †
- Class Myxini
- Class Osteichthyes (awaiting allocation)
- Class Osteichthyes incertae sedis †
- Class Ostracodermi †
- Class Pisces (awaiting allocation)
- Class Placodermi †
- Class Pteraspidomorphi †
- Class Sarcopterygii
- Class Thelodonti †
- Genus Emmonsaspis Resser & Howell, 1938 †
- Genus Harajicadectes Choo, Holland, Clement, King, Challands, Young & Long, 2024 †
- Genus Kahamachli Malkani, 2019 †
- Genus Nuucichthys Lerosey-Aubril & Ortega-Hernández, 2024 †
- Genus Rhynchocopros Hunt, Lucas & Spielmann, 2013 †
- Genus Santamariacopros Hunt, Lucas & Spielmann, 2013 †
- Genus Squirmarius McCoy, Wittry, Sadabadi & Mayer, 2023 †
- Class Chordata (awaiting allocation)
- Class Eotetrapodiformes incertae sedis
- 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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