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
- Subphylum Chelicerata
- Subphylum Crustacea
- Class Branchiopoda
- Order Anostraca
- Order Branchiopoda (awaiting allocation)
- Order Cryptopoda †
- Order Diplostraca
- Family Afrograptidae Novozhilov, 1957 †
- Family Anomopoda incertae sedis
- Family Antronestheriidae Chen & Hudson, 1991 †
- Family Aquilonoglyptidae Novojilov, 1958 †
- Family Asmussiidae Kobayashi, 1954 †
- Family Bosminidae Baird, 1845
- Family Cercopagididae Mordukhai-Boltovskoi, 1968
- Family Chydoridae Stebbing, 1902
- Genus Acanthalona Sinev & Kobayashi, 2012
- Genus Acroperus Baird, 1843
- Genus Alona Baird, 1843
- Genus Alonella Sars, 1862
- Genus Alonopsis Sars, 1862
- Genus Alpinalona Alonso & Sinev, 2017
- Genus Anchistropus Sars, 1862
- Genus Anthalona van Damme, Sinev & Dumont, 2011
- Genus Archepleuroxus Smirnov & Timms, 1983
- Genus Armatalona Sinev, 2004
- Genus Armatolona
- Genus Australochydorus Smirnov & Timms, 1983
- Genus Australochyrodorus Smirnov & Timms, 1983
- Genus Bergamina Elmoor-Loureiro, Santos-Wisniewski & Rocha, 2013
- Genus Biapertura Smirnov, 1971
- Genus Brancelia Van Damme & Sinev, 2011
- Genus Bryospilus Frey, 1980
- Genus Bullatifrons Frey, 1975 †
- Genus Camptocercus Baird, 1843
- Genus Chilodorus Latreille in Cuvier, 1829 accepted as Chydorus Leach, 1843
- Genus Chydorus Leach, 1843
- Genus Coronatella Dybowski & Grochowski, 1894
- Genus Dadaya Sars, 1901
- Genus Disparalona Fryer, 1968
- Genus Dumontiellus Smirnov, 2007
- Genus Dunhevedia King, 1853
- Genus Duwenhedia
- Genus Ephemeralona Sinev, 2020 accepted as Alona Baird, 1843
- Genus Ephemeroporus Frey, 1982
- Genus Estatheroporus Alonso, 1990
- Genus Euryalona Sars, 1901
- Genus Eurycercus O.F. Müller, 1785
- Genus Eurycercus Baird, 1843
- Genus Extremalona Sinev & Shiel, 2012
- Genus Geoffreya Kotov, Sinev & Berrios, 2010
- Genus Graptoleberis G.O. Sars, 1862
- Genus Halona Agassiz, 1846 accepted as Alona Baird, 1843
- Genus Harporhynchus Sars, 1862 †
- Genus Indialona Petkovski, 1966
- Genus Karualona Dumont & Silva-Briano, 2000
- Genus Kisakiellus Sousa & Elmoor-Loureiro, 2018
- Genus Korealona Jeong, Sinev, Brancelj, Chang & Kotov, 2017
- Genus Kurzia Dybowski & Grochowski, 1894
- Species Kurzia latissima (Kurz, 1874)
- Species Kurzia longirostris (Daday, 1898)
- Genus Leberis Smirnov, 1989
- Genus Leptorhynchus Herrick, 1884 † accepted as Rhynchotalona Norman, 1903
- Genus Leptorrhynchus Bergroth, 1905 † accepted as Rhynchotalona Norman, 1903
- Genus Leydigia Kurz, 1875
- Genus Maraura Sinev & Shiel, 2008
- Genus Matralona van Damme & Dumont, 2009
- Genus Miralona Sinev, 2004
- Genus Monope Smirnov & Timms, 1983
- Genus Monoporus Smirnov, 1977 accepted as Monope Smirnov & Timms, 1983
- Genus Monospilus G.O. Sars, 1861
- Genus Nedorhynchotalona Kotov & Sinev, 2011
- Genus Neoleydigia Kotov, 2009 accepted as Leydigia Kurz, 1875
- Genus Notoalona Rajapaksa & Fernando, 1987
- Genus Notoalona Rajapaska, 1987 accepted as Notoalona Rajapaksa & Fernando, 1987
- Genus Ovalona van Damme & Dumont, 2008
- Genus Oxyurella Dybowski & Grochowski, 1894
- Genus Paralona Sramek-Husek, Straskraba & Brtek, 1962
- Genus Parvalona Van Damme, Kotov & Dumont, 2005
- Genus Peracantha Baird, 1843
- Genus Phreatalona Van Damme, Brancelj & Dumont, 2009
- Genus Picripleuroxus Frey, 1993
- Genus Pleuroxus Baird, 1843
- Genus Prenda Sousa, Elmoor-Loureiro & Santos, 2016 accepted as Prendalona Sousa, Elmoor-Loureiro & Santos, 2018
- Genus Prendalona Sousa, Elmoor-Loureiro & Santos, 2018
- Genus Pseudochydorus Fryer, 1968
- Genus Rak Smirnov & Timms, 1983
- Genus Rhynchochydorus Smirnov & Timms, 1983
- Genus Rhynchotalona Norman, 1903
- Genus Salinalona Van Damme & Maiphae, 2013
- Genus Saycia Sars, 1904
- Genus Teretifrons Frey, 1975
- Genus Tretocephala Frey
- Genus Tylopleuroxus Frey, 1993 accepted as Pleuroxus Baird, 1843
- Family Cladocera (awaiting allocation)
- Family Conchostraca (awaiting allocation)
- Family Cyclestheridae accepted as Cyclestheriidae
- Family Cyclestheriidae
- Family Cyzicidae Stebbing, 1910
- Family Daphniidae Straus, 1820
- Family Diplostraca (awaiting allocation)
- Family Dumontiidae
- Family Eosestheriidae Zhang & Chen, 1976 †
- Family Estheriellidae Kobayashi, 1954 †
- Family Euestheriidae Defretin-Lefrance, 1965 †
- Family Eurycercidae accepted as Chydoridae Stebbing, 1902
- Family Fushunograptidae Wang in Hong, Yang, Wang, Wang, Li, Sun, Sun & Tu, 1974 †
- Family Gondwanotrichidae Van Damme, Shiel & Dumont, 2007
- Family Holopediidae G.O. Sars, 1865
- Family Ilyocryptidae Smirnov, 1971
- Family Ipsiloniidae Novozhilov, 1958 †
- Family Jilinestheriidae Zhang & Chen, 1976 †
- Family Leaiidae †
- Family Leptestheriidae
- Family Leptodoridae Lilljeborg, 1861
- Family Limnadiidae Baird, 1894
- Family Limnadopsidae Tasch, 1969 accepted as Limnadiidae Baird, 1894
- Family Lioestheriidae Raymond, 1946 †
- Family Loxomegaglyptidae Novojilov, 1958 †
- Family Lynceidae
- Family Macrothricidae Norman & Brady, 1867
- Family Moinidae Goulden, 1968
- Family Nototrichidae van Damme, Shiel & Dumont, 2007
- Family Pemphilimnadiopsidae Tasch, 1961 †
- Family Podonidae Mordukhai-Boltovskoi, 1968
- Family Polyphemidae Baird, 1845
- Family Prochydoridae Srnirnov, 1992 †
- Family Pseudopenilidae Korovchinsky & Sergeeva, 2008
- Family Shipingiidae Kozur & Weems, 2005 †
- Family Sididae Baird, 1850
- Family Sinoestheriidae Chen & Shen, 1982 †
- Family Triglyptidae Wang, 2014 †
- Family Ulugkemiidae Novojilov, 1938 †
- Family Vertexiidae Kobayashi, 1954 †
- Family Xiangxiellidae Shen, 1976 †
- Genus Eicheleaia Poschmann, Hegna & Astrop, Hoffmann, 2024 †
- Genus Grauvogelocaris Geyer, Hegna & Kelber, 2024 †
- Genus Undulatesta Gueriau, Rabet & Du Tien Hat, 2016 †
- Order Kazacharthra †
- Order Lipostraca †
- Order Notostraca
- Order Phyllopoda (awaiting allocation)
- Genus Olesenocaris Geyer, Hegna & Kelber, 2024 †
- Class Cephalocarida
- Class Crustacea (awaiting allocation)
- Class Crustacea incertae sedis
- Class Ichthyostraca
- Class Malacostraca
- Class Maxillopoda
- Class Ostracoda
- Class Remipedia
- Order Cyclida †
- Genus Anatifera Meuschen, 1787
- Genus Dickinsonia Tasch, 1963 † accepted as Elmocephalus Tasch, 1964 †
- Genus Elmocephalus Tasch, 1964 †
- Subphylum Hexapoda
- Subphylum Myriapoda
- Subphylum Trilobitomorpha †
- Class Arachnomorpha (awaiting allocation)
- Class Arthropoda (awaiting allocation)
- Class Artiopoda †
- Class Crustaceomorpha incertae sedis †
- Class Dinocaridida †
- Class Labrophora incertae sedis
- Class Lamellipedia incertae sedis
- Class Megacheira †
- Class Thylacocephala †
- Class Xenocarida incertae sedis
- Order Canadaspidida † accepted as Hymenocarina †
- Order Cheloniellida †
- Order Emeraldellida † accepted as Arthropoda
- Order Fuxianhuiida †
- Order Habeliida †
- Order Hymenocarina †
- Order Isoxyida †
- Order Pectocaridida † accepted as Hymenocarina †
- Order Waptiida † accepted as Hymenocarina †
- Family Bomakellidae Fedonkin, 1987 †
- Family Burgessiidae Walcott, 1912 †
- Family Emeraldellidae Raymond, 1935 †
- Family Guangweicarididae Luo, Fu, Hu, Li, Hou, You, Pang & Liu, 2007 †
- Genus Aaveqaspis Peel & Stein, 2009 †
- Genus Acheronauta Pulsipher, Anderson, Wright, Kluessendorf, Mikulic & Schiffbauer, 2022 †
- Genus Arthroaspis Stein, Budd, Peel & Harper, 2013 †
- Genus Astutuscaris Jiao & Du, 2022 †
- Genus Bennettarthra Fayers, Trewin & Morrissey, 2010 †
- Genus Bushizheia O'Flynn & Liu in O'Flynn et al., 2020 †
- Genus Chuandianella Hou & Bergström, 1991 †
- Genus Dioxycaris Gürich, 1929 †
- Genus Dongshanocaris Hou, Bergström, Wang, Feng & Chen, 1999 †
- Genus Duraznovis Lara, Cariglino & Zavattieri in Lara et al., 2019 †
- Genus Duraznovs Lara, Cariglino & Zavattieri in Lara et al., 2019 † accepted as Duraznovis Lara, Cariglino & Zavattieri in Lara et al., 2019 †
- Genus Esmeraldacaris Waggoner, 2003 †
- Genus Fibulacaris Izquierdo-López & Caron, 2019 †
- Genus Kiisortoqia Stein, 2010 †
- Genus Kylinxia Zeng, Zhao, Niu, Zhu & Huang, 2020 †
- Genus Lihuacaris Jiao, Pates, Lerosey-Aubril, Ortega-Hernández, Yang, Lan & Zhang, 2021 †
- Genus Norikeya Tanaka, Siveter & Williams, 2013 †
- Genus Nothozoe Barrande, 1872 †
- Genus Nothozoe Barrande in Bigsby, 1868 † accepted as Nothozoe Barrande, 1872 †
- Genus Notozoe Zittel, 1885 † accepted as Nothozoe Barrande, 1872 †
- Genus Pakucaris Izquierdo-López & Caron, 2021 †
- Genus Pambdelurion Budd, 1998 †
- Genus Parvibellus Liu, Dunlop, Steiner & Shu, 2022 †
- Genus Pleuralata McCoy, Strother & Briggs, 2012 †
- Genus Pseudoangustidontus Van Roy & Tetlie, 2006 †
- Genus Pteroessa Hudson & Gosse, 1886
- Genus Sidneyia Walcott, 1911 †
- Genus Siriocaris Lagebro, Stein & Peel, 2009 †
- Genus Vermontcaris Pari, Briggs & Gaines, 2022 †
- Genus Youti Smith, Long, Dhungana, Dobson, Yang & Zhang, 2024 †
- 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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