Between brackets is the number of accepted species
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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
- Class Cephalocarida
- Class Crustacea (awaiting allocation)
- Class Crustacea incertae sedis
- Class Ichthyostraca
- Class Malacostraca
- Order Aeschronectida †
- Order Amphionidacea
- Order Amphipoda
- Order Anaspidacea
- Order Angustidontida †
- Order Archaeostraca †
- Order Asellota (awaiting allocation)
- Order Bathynellacea
- Order Belotelsonidea †
- Order Cumacea
- Order Decapoda
- Order Eocaridacea †
- Order Eumalacostraca (awaiting allocation)
- Order Euphausiacea
- Order Hoplostraca
- Order Hymenostraca †
- Order Isopoda
- Order Leptostraca
- Order Lophogastrida
- Order Malacostraca (awaiting allocation)
- Order Mictacea
- Order Mysida
- Family Boreomysidae Holt & Tattersall, 1905
- Family Lepidomysidae Clarke, 1961
- Family Lepidophthalmidae Fage, 1924 accepted as Lepidomysidae Clarke, 1961
- Family Lepidopidae Stammer, 1936 accepted as Lepidomysidae Clarke, 1961
- Family Lepidopsidae Villalobos, 1951 accepted as Lepidomysidae Clarke, 1961
- Family Mysida (awaiting allocation)
- Family Mysidae Haworth, 1825
- Genus Aberomysis Bacescu & Iliffe, 1986
- Genus Abyssomysis Wittmann, 2020
- Genus Acanthocaris Sim, 1872 accepted as Gastrosaccus Norman, 1868
- Genus Acanthomysis Czerniavsky, 1882
- Genus Afromysis Zimmer, 1916
- Genus Alienacanthomysis Holmquist, 1981
- Genus Allienacanthomysis accepted as Alienacanthomysis Holmquist, 1981
- Genus Amathimysis Brattegard, 1969
- Genus Amblyops G.O. Sars, 1872
- Genus Amblyopsis G.O. Sars, 1869 accepted as Amblyops G.O. Sars, 1872
- Genus Amblyopsoides O. Tattersall, 1955
- Genus Americamysis Price, Heard & Stuck, 1994
- Genus Amphiakrops Wittmann, 2024
- Genus Anchialina Norman & Scott, 1906
- Genus Anchialus Krøyer, 1861 accepted as Anchialina Norman & Scott, 1906
- Genus Anchiolus [misspelling] accepted as Anchialina Norman & Scott, 1906
- Genus Anisomysis Hansen, 1910
- Genus Anisomysis Bacescu, 1973 accepted as Anisomysis Hansen, 1910
- Genus Antarctomysis Coutière, 1906
- Genus Antichthomysis Fenton, 1991
- Genus Antromysis Creaser, 1936
- Genus Arachnomysis Chun, 1887
- Genus Archaeomysis Czerniavsky, 1882
- Genus Arctomysis Hansen, 1887 accepted as Hansenomysis Stebbing, 1893
- Genus Arthromysis Colosi, 1924
- Genus Atlanterythrops Nouvel & Lagardère, 1976
- Genus Australerythrops W. Tattersall, 1928
- Genus Australomysis W. Tattersall, 1927
- Genus Austromysis Czerniavsky, 1882 accepted as Paramysis Czerniavsky, 1882
- Genus Aviamysis San Vicente & Cartanyà, 2017 †
- Genus Bathymysis W. Tattersall, 1907
- Genus Bermudamysis Bacescu & Iliffe, 1986
- Genus Birsteiniamysis Tchindonova, 1981 accepted as Neobirsteiniamysis Hendrickx & Tchindonova, 2020
- Genus Boreoacanthomysis Fukuoka & Murano, 2004
- Genus Boreomysis G.O. Sars, 1869
- Genus Bowmaniella Heard & Price, 2006 accepted as Chlamydopleon Ortmann, 1893
- Genus Bowmaniella Bacescu, 1968
- Genus Brasilomysis Bacescu, 1968
- Genus Brutomysis Chun, 1896 accepted as Euchaetomera G.O. Sars, 1883
- Genus Burrimysis Jaume & Garcia, 1993
- Genus Caesaromysides Colosi, 1916 accepted as Caesaromysis Ortmann, 1893
- Genus Caesaromysis Ortmann, 1893
- Genus Callomysis Holmes, 1894 accepted as Archaeomysis Czerniavsky, 1882
- Genus Calyptomma W. Tattersall, 1909
- Genus Canegieomysis
- Genus Carnegieomysis W. Tattersall, 1943 accepted as Anisomysis Hansen, 1910
- Genus Caspiomysis G.O. Sars, 1907
- Genus Ceratodoxomysis Murano, 2003
- Genus Chalcophthalmus Illig, 1906 accepted as Dactylamblyops Holt & Tattersall, 1906
- Genus Chelamblyops Wittmann, 2024
- Genus Chiromysis G.O. Sars, 1877 accepted as Heteromysis S.I. Smith, 1873
- Genus Chlamydopleon Ortmann, 1893
- Genus Chunomysis Holt & Tattersall, 1905
- Genus Coifmanniella Bacescu, 1968 accepted as Bowmaniella Bacescu, 1968
- Genus Coifmanniella Heard & Price, 2006
- Genus Columbiaemysis Holmquist, 1982
- Genus Corellamysis San Vicente in San Vicente & Monniot, 2014
- Genus Cryptomysis Hansen, 1912 accepted as Anisomysis Hansen, 1910
- Genus Cubanomysis Bacescu, 1968
- Genus Cynthia Thompson, 1829 accepted as Siriella Dana, 1850
- Genus Cynthilia White, 1850 accepted as Siriella Dana, 1850
- Genus Dactylamblyops Holt & Tattersall, 1906
- Genus Dactylerythrops Holt & Tattersall, 1905
- Genus Dasymysis Holt & Beaumont, 1900 accepted as Acanthomysis Czerniavsky, 1882
- Genus Deltamysis Bowman & Orsi, 1992
- Genus Desmocornea Wittmann, 2024
- Genus Diamysis Czerniavsky, 1882
- Genus Dioptromysis Zimmer, 1915
- Genus Disacanthomysis Holmquist, 1981
- Genus Dohrnia Malm, 1874
- Genus Doxomysis Hansen, 1912
- Genus Echaetomera G.O. Sars, 1883 accepted as Euchaetomera G.O. Sars, 1883
- Genus Echinomysides Murano, 1977
- Genus Echinomysis Illig, 1905
- Genus Enchinomysides
- Genus Eoamblyops Murano, 2013
- Genus Eoerythrops Murano, 1969 accepted as Gibberythrops Illig, 1930
- Genus Erythrops G.O. Sars, 1869
- Genus Euchaetomera G.O. Sars, 1883
- Genus Euchaetomeropsis W. Tattersall, 1909
- Genus Eurobowmaniella Murano, 1995
- Genus Euxinomysis Czerniavsky, 1882 accepted as Diamysis Czerniavsky, 1882
- Genus Exacanthomysis Holmquist, 1981
- Genus Gangemysis Derzhavin, 1924
- Genus Gastrosaccus Norman, 1868
- Genus Gibbamblyops Murano & Krygier, 1985
- Genus Gibberythrops Illig, 1930
- Genus Gironomysis Ortiz, García-Debrás & Pérez, 1997
- Genus Gnathomysis Bonnier & Pérez, 1902 accepted as Heteromysis S.I. Smith, 1873
- Genus Gymnerythrops Hansen, 1910
- Genus Halemysis Bacescu & Udrescu, 1984
- Genus Haplostylus Kossmann, 1880
- Genus Harmelinella Ledoyer, 1989
- Genus Hemiacanthomysis Fukuoka & Murano, 2002
- Genus Hemimysis G.O. Sars, 1869
- Genus Hemisiriella Hansen, 1910
- Genus Heteroerythrops O. Tattersall, 1955
- Genus Heteromysis S.I. Smith, 1873
- Genus Heteromysis Czerniavsky, 1882 accepted as Heteromysis S.I. Smith, 1873
- Genus Heteromysis Bacescu, 1968 accepted as Heteromysis S.I. Smith, 1873
- Genus Heteromysoides Bacescu, 1968
- Genus Heterosiriella Czerniavsky, 1882 accepted as Siriella Dana, 1850
- Genus Hippacanthomysis Murano & Chess, 1987
- Genus Holmesiella Ortmann, 1908
- Genus Holmesimysis Holmquist, 1979
- Genus Holmesimyss
- Genus Holmsiella Ortmann, 1908 accepted as Holmesiella Ortmann, 1908
- Genus Hyperacanthomysis Fukuoka & Murano, 2000
- Genus Hyperamblyops Birstein & Tchindonova, 1958
- Genus Hypererythrops Holt & Tattersall, 1905
- Genus Hyperiimysis Nouvel, 1966
- Genus Hyperstilomysis Fukuoka, Bravo & Murano, 2005
- Genus Idiomysis W. Tattersall, 1922
- Genus Iiella Bacescu, 1968
- Genus Iimysis Nouvel, 1966
- Genus Illigiella Murano, 1981
- Genus Indoerythrops Panampunnayil, 1998
- Genus Indomysis W. Tattersall, 1914
- Genus Inusitatiomysis Ii, 1940 accepted as Inusitatomysis Ii, 1940
- Genus Inusitatomysis Ii, 1940
- Genus Ischiomysis Wittmann, 2013
- Genus Javanisomysis Bacescu, 1992 † accepted as Anisomysis Hansen, 1910
- Genus Kainomatomysis W. Tattersall, 1927 accepted as Kainommatomysis W. Tattersall, 1927
- Genus Kainommatomysis W. Tattersall, 1927
- Genus Katamysis G.O. Sars, 1893
- Genus Katerythrops Holt & Tattersall, 1905
- Genus Keslerella Czerniavsky, 1882 accepted as Praunus Leach, 1814
- Genus Kesslerella Czerniavsky, 1882 accepted as Keslerella Czerniavsky, 1882
- Genus Kochimysis Panampunnayil & Biju, 2007
- Genus Kreagromysis Illig, 1930 accepted as Anisomysis Hansen, 1910
- Genus Leptocaris Aurivillius, 1898 accepted as Mesopodopsis Czerniavsky, 1882
- Genus Leptomysis G.O. Sars, 1869
- Genus Liella Cui & Huo, 1985 †
- Genus Limnomysis Czerniavsky, 1882
- Genus Liuimysis Wang, 1998
- Genus Longidentia Daneliya, 2004
- Genus Longithorax Illig, 1906
- Genus Lycomysis Hansen, 1910
- Genus Macromysis White, 1847 accepted as Praunus Leach, 1814
- Genus Macropsis G.O. Sars, 1877 accepted as Mesopodopsis Czerniavsky, 1882
- Genus Marumomysis Murano, 1999
- Genus Mastigophthalmus Illig, 1906 accepted as Euchaetomera G.O. Sars, 1883
- Genus Megalophthalmus Leach, 1830 accepted as Mysis Latreille, 1802
- Genus Megalopsis Panampunnayil, 1987
- Genus Meierythrops Murano, 1981
- Genus Mesacanthomysis Nouvel, 1967
- Genus Mesomys Sars, 1893 accepted as Mesomysis Czerniavsky, 1882
- Genus Mesomysis Czerniavsky, 1882 accepted as Mysis Latreille, 1802
- Genus Mesomysis Norman, 1905 accepted as Michtheimysis Norman, 1902
- Genus Mesopodopsis Czerniavsky, 1882
- Genus Metamblyops W. Tattersall, 1907
- Genus Metamysidella Illig, 1906 accepted as Mysidetes Holt & Tattersall, 1906
- Genus Metamysidopsis W. Tattersall, 1951
- Genus Metamysis Nakazawa, 1910 accepted as Acanthomysis Czerniavsky, 1882
- Genus Metamysis G.O. Sars, 1895 accepted as Paramysis Czerniavsky, 1882
- Genus Metasiriella Murano, 1986
- Genus Meterythrops S.I. Smith, 1879
- Genus Michtheimysis Norman, 1902 accepted as Mysis Latreille, 1802
- Genus Michthyops Tattersall, 1911
- Genus Mychthyops Tattersall, 1911 accepted as Michthyops Tattersall, 1911
- Genus Mysideis G.O. Sars, 1869
- Genus Mysidella G.O. Sars, 1872
- Genus Mysidetes Holt & Tattersall, 1906
- Genus Mysidia Dana, 1850
- Genus Mysidium Dana, 1852
- Genus Mysidopsis G.O. Sars, 1864
- Genus Mysifaun Wittmann, 1996
- Genus Mysimenzies Bacescu, 1971
- Genus Mysis Latreille, 1802
- Genus Nakazawai Murano, 1981 accepted as Nakazawaia Murano, 1981
- Genus Nakazawaia Murano, 1981
- Genus Nanomysis W. Tattersall, 1921
- Genus Nanoparamysis Daneliya, 2004
- Genus Nematopus G.O. Sars, 1863 accepted as Erythrops G.O. Sars, 1869
- Genus Neoamblyops Fukuoka, 2009
- Genus Neobathymysis Bravo & Murano, 1996
- Genus Neobirsteiniamysis Hendrickx & Tchindonova, 2020
- Genus Neodoxomysis Murano, 1999
- Genus Neoheteromysis Bacescu, 1976 accepted as Heteromysis S.I. Smith, 1873
- Genus Neomysis Czerniavsky, 1882
- Genus Nipponerythrops Murano, 1977
- Genus Nipponomysis Takahashi & Murano, 1986
- Genus Notacanthomysis Fukuoka & Murano, 2000
- Genus Notomysis Wittmann, 1986
- Genus Nouvelia Bacescu & Vasilescu, 1973
- Genus Nysidopsis G.O. Sars, 1864 accepted as Mysidopsis G.O. Sars, 1864
- Genus Occimysidium Wittmann in Wittmann & Wirtz, 2019 accepted as Mysidium Dana, 1852
- Genus Occiparamysis Daneliya, 2004
- Genus Olivaemysis Bacescu, 1979
- Genus Olivemysis Bacescu, 1968
- Genus Onychomysis Krøyer, 1859
- Genus Onychomysis Czerniavsky, 1882 accepted as Mysis Latreille, 1802
- Genus Orientomysidium Wittmann in Wittmann & Wirtz, 2019 accepted as Mysidium Dana, 1852
- Genus Orientomysis Derzhavin, 1913
- Genus Pacifacanthomysis Holmquist, 1981
- Genus Palaumysis Bacescu & Iliffe, 1986
- Genus Paracanthomysis Ii, 1936
- Genus Paraleptomysis Liu & Wang, 1983
- Genus Paramblyops Holt & Tattersall, 1905
- Genus Paramesopodopsis Fenton, 1985
- Genus Paramysidopsis Zimmer, 1912 accepted as Mysidopsis G.O. Sars, 1864
- Genus Paramysis Czerniavsky, 1882
- Genus Paranchialina Hansen, 1910
- Genus Paranisomysis Bacescu, 1973 accepted as Anisomysis Hansen, 1910
- Genus Parapodopsis Czerniavsky, 1882 accepted as Mesopodopsis Czerniavsky, 1882
- Genus Parapseudomma Nouvel & Lagardère, 1976
- Genus Parastilomysis Ii, 1936
- Genus Parerythrops G.O. Sars, 1869
- Genus Parvimysis Brattegard, 1969
- Genus Platymysis Brattegard, 1980
- Species Platymysis facilis Brattegard, 1980
- Genus Platyops Bacescu & Iliffe, 1986
- Genus Pleurerythrops Ii, 1964
- Genus Podopsis J.V. Thompson, 1828 accepted as Mesopodopsis Czerniavsky, 1882
- Genus Pontomysis Czerniavsky, 1882 accepted as Gastrosaccus Norman, 1868
- Genus Potamomysis Czerniavsky, 1882 accepted as Diamysis Czerniavsky, 1882
- Genus Praunus Leach, 1814
- Genus Prionomysis W. Tattersall, 1922
- Genus Proleptomysis Wittmann, 1985 accepted as Pyroleptomysis Wittmann, 1985
- Genus Promysis Dana, 1850
- Genus Promysis Krøyer, 1861 accepted as Siriella Dana, 1850
- Genus Proneomysis W. Tattersall, 1933
- Genus Protosiriella Czerniavsky, 1882 accepted as Siriella Dana, 1850
- Genus Pseudamblyops Ii, 1964
- Genus Pseudanchialina Hansen, 1910
- Genus Pseudanchialus Caullery, 1896 accepted as Boreomysis G.O. Sars, 1869
- Genus Pseudanisomysis Murano & Fukuoka, 2003 † accepted as Carnegieomysis W. Tattersall, 1943
- Genus Pseudanisomysis Pillai, 1976 †
- Genus Pseuderythrops Coifmann, 1936
- Genus Pseudobranchiomysis Carcedo, Fiori & Hoffmeyer, 2013
- Genus Pseudomma G.O. Sars, 1870
- Genus Pseudomysidetes W. Tattersall, 1936
- Genus Pseudomysis G. O. Sars, 1879
- Genus Pseudoparamysis Bacescu, 1940 accepted as Paramysis Czerniavsky, 1882
- Genus Pseudosiriella Claus, 1884 accepted as Siriella Dana, 1850
- Genus Pseudoxomysis Nouvel, 1973
- Genus Pteromysis Ii, 1964
- Genus Pugetomysis Banner, 1948 accepted as Mysis Latreille, 1802
- Genus Pyroleptomysis Wittmann, 1985
- Genus Retromysis Wittmann, 2004
- Genus Rhinomysis Czerniavsky, 1882 accepted as Siriella Dana, 1850
- Genus Rhopalophthalmus Illig, 1906
- Genus Rostromysis Panampunnayil, 1987
- Genus Sarmysis Maissuradze & Popescu, 1987 †
- Genus Schistomysis Norman, 1892
- Genus Schizurakrops Wittmann, 2024
- Genus Scolamblyops Murano, 1974
- Genus Serrapalpisis Daneliya, 2004
- Genus Shenimysis Wang, 1998
- Genus Siriella Dana, 1850
- Genus Siriellerythrops Ledoyer, 1970 accepted as Siriella Dana, 1850
- Genus Siriellides Czerniavsky, 1882 accepted as Siriella Dana, 1850
- Genus Stellamblyops Petryashov & Frutos, 2017
- Genus Stilomysis Norman, 1892
- Genus Surinamysis Bowman, 1977
- Genus Synerythrops Hansen, 1910
- Genus Synmysis Czerniavsky, 1882
- Genus Taphromysis Banner, 1953
- Genus Tasmanomysis Fenton, 1985
- Genus Telacanthomysis Fukuoka & Murano, 2001
- Genus Tenagomysis Thomson, 1900
- Genus Tenogomysis
- Genus Teratamblyops Murano, 2001
- Genus Teraterythrops Ii, 1964
- Genus Thalassomysis W. Tattersall, 1939
- Genus Themisto Goodsir, 1842
- Genus Thenagomysis Thomson, 1900 accepted as Tenagomysis Thomson, 1900
- Genus Troglomysis Stammer, 1933
- Genus Uromysis Hansen, 1910 accepted as Promysis Dana, 1850
- Genus Xenacanthomysis Holmquist, 1980
- Genus Xenerythrops Ii, 1964 accepted as Longithorax Illig, 1906
- Genus Xenomysis Kou, Meland & Li, 2019 †
- Genus Zangis Gistl, 1848
- Family Petalophthalmidae Czerniavsky, 1882
- Family Stygiomysidae Caroli, 1937
- Order Palaeocaridacea †
- Order Palaeostomatopoda †
- Order Phyllocarida (awaiting allocation)
- Order Phyllocarida incertae sedis †
- Order Pygocephalomorpha †
- Order Spelaeogriphacea
- Order Stomatopoda
- Order Syncarida incertae sedis †
- Order Tanaidacea
- Order Thermosbaenacea
- Order Waterstonellidea
- Family Essoidiidae Schram, 1974 †
- Genus Hohensteiniella Haug, Poschmann, Hörnig & Lutz, 2016 †
- Genus Mesoprosopon Stolley, 1914 †
- 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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