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
- Class Arachnida
- Order Acari (awaiting allocation)
- Order Acariformes (awaiting allocation)
- Order Actinedida
- Order Amblypygi
- Order Arachnida (awaiting allocation)
- Order Arachnida incertae sedis
- Order Araneae
- Order Architarbida †
- Order Astigmata
- Order Haptopodida †
- Order Holothyrida
- Order Ixodida
- Order Mesostigmata
- Order Opilioacarida
- Order Opiliocariformes
- Order Opiliones
- Family Agoristenidae Silhavý, 1973
- Family Agoristeridae Rambla & Juberthie, 1994 accepted as Agoristenidae Silhavý, 1973
- Family Askawachidae Kury & Carvalho in Kury et al., 2020
- Family Assamiidae Sørensen, 1884
- Family Beloniscidae Kury, Pérez-González & Proud, 2019
- Family Biantidae Thorell, 1889
- Family Briggsidae Özdikmen & Demir, 2008
- Family Buemarinoidae Karaman, 2019
- Family Caddidae Banks, 1892
- Family Ceratolasmatidae Shear, 1986 accepted as Ischyropsalididae Simon, 1879
- Family Ceratolasmetidae accepted as Ceratolasmatidae Shear, 1986
- Family Ceratolasmidae accepted as Ceratolasmatidae Shear, 1986
- Family Cladonychiidae Hadzi, 1935
- Family Cosmetidae C.L. Koch, 1839
- Family Cranaidae Roewer, 1913
- Family Cryptogeobiidae Kury, 2014
- Family Cyphophthalmi (awaiting allocation)
- Family Cyphophthalmi incertae sedis
- Family Dicranolasmatidae Simon, 1879
- Family Dyspnoi incertae sedis
- Family Eotrogulidae Petrunkevitch, 1955 †
- Family Epedanidae Sørensen in L. Koch, 1886
- Family Erebomastridae Briggs, 1969 accepted as Cladonychiidae Hadzi, 1935
- Family Escadabiidae Kury & Pérez, 2003
- Family Eupnoi incertae sedis
- Family Gagrellidae
- Family Gerdesiidae Bragagnolo, Hara & Pinto-da-Rocha, 2015
- Family Globipedidae Kury & Cokendolpher in Kury et al., 2020
- Family Gonyleptidae Sundevall, 1833
- Family Grassatores incertae sedis
- Family Guasiniidae González-Sponga, 1997
- Family Hastocularidae Kury, Dunlop & Mendes in Kury et al., 2020 †
- Family Hinzuanidae Pocock, 1903 accepted as Biantidae Thorell, 1889
- Family Icaleptidae Kury & Pérez, 2002
- Family Ischyropsalidae Simon, 1879 accepted as Ischyropsalididae Simon, 1879
- Family Ischyropsalididae Simon, 1879
- Family Ischyropsalidoidea incertae sedis
- Family Kimulidae Pérez-González, Kury & Alonso-Zarazaga in Pérez-González & Kury, 2007
- Family Kustarachnidae Petrunkevitch, 1913 †
- Family Leiobunidae
- Family Lomanellidae Mendes & Derkarabetian, 2021
- Family Manaosbiidae Roewer, 1943
- Family Megalopsalididae
- Family Mesokanidae Bartel, Dunlop, Sharma, Selden, Ren & Shih, 2021 †
- Family Metasarcidae Kury, 1994
- Family Minuidae Sørensen, 1932 accepted as Kimulidae Pérez-González, Kury & Alonso-Zarazaga in Pérez-González & Kury, 2007
- Family Monoscutidae Forster, 1948
- Family Nemastomatidae Simon, 1879
- Family Nemastomoididae Petrunkevitch, 1955 †
- Family Neogoveidae Shear, 1980
- Family Neopilionidae Lawrence, 1931
- Family Nipponopsalididae Martens, 1976
- Family Nomoclastidae Roewer, 1943
- Family Ogoveidae Shear, 1980
- Family Oncopodidae Thorell, 1876 accepted as Sandokanidae Özdikmen & Kury, 2007
- Family Opiliones (awaiting allocation)
- Family Opilionida (awaiting allocation)
- Family Otilioleptidae Acosta, 2019
- Family Palpinidae Pickard-Cambridge, 1905 accepted as Cosmetidae C.L. Koch, 1839
- Family Paralolidae Kratochvíl, 1958 accepted as Phalangodidae Simon, 1879
- Family Paranonychidae Briggs, 1971
- Family Parasironidae Karaman, Mitov & Snegovaya, 2024
- Family Peltaeonychidae Absolon & Kratochvíl, 1932 accepted as Travuniidae Absolon & Kratochvíl, 1932
- Family Pentanychidae Briggs, 1971
- Family Petrobunidae Sharma & Giribet, 2011
- Family Pettalidae Shear, 1980
- Family Phalangiidae Thorell, 1876
- Family Phalangioidea incertae sedis
- Family Phalangodidae Simon, 1879
- Family Podoctidae Roewer, 1912
- Family Prostygnidae Roewer, 1913
- Family Protolophidae
- Family Pyramidopidae Sharma, Prieto & Giribet, 2011
- Family Sabaconidae Dresco, 1970
- Family Samoidae Sørensen in L. Koch, 1886
- Family Sandokanidae Özdikmen & Kury, 2007
- Family Sclerosomatidae Simon, 1879
- Family Sironidae Simon, 1879
- Family Stignidae Mello-Leitão, 1935 accepted as Stygnidae Simon, 1879
- Family Stygnidae Simon, 1879
- Family Stygnommatidae Roewer, 1923
- Family Stygnopsidae Sørensen, 1932
- Family Stygophalangiidae Oudemans, 1933
- Family Stylocellidae Hansen & Sørensen, 1904
- Family Suthepiidae Martens, 2020
- Family Synthetonychidae Forster, 1954
- Family Taracidae Schönhofer, 2013
- Family Tetrophthalmi incertae sedis
- Family Tithaeidae Sharma & Giribet, 2011
- Family Travuniidae Absolon & Kratochvíl, 1932
- Family Travunioidea (awaiting allocation)
- Family Triaenonychidae Sørensen in L. Koch, 1886
- Genus Acumontia Loman, 1898
- Genus Adaeulum Roewer, 1915
- Genus Adaeum Karsch, 1880
- Genus Adaulum accepted as Adaeulum Roewer, 1915
- Genus Adiranonyx Porto, Derkarabetian, Ramírez, Giribet & Pérez-González, 2022
- Genus Akaroa Roewer, 1931 accepted as Soerensenella Pocock, 1903
- Genus Algidia Hogg, 1920
- Genus Allobunus Hickman, 1958
- Genus Allonuncia Hickman, 1958
- Genus Amatola Lawrence, 1931
- Genus Americobunus Cuevas, 1972
- Genus Ankaratrix Lawrence, 1959
- Genus Ankylonuncia Hickman, 1958
- Genus Antongila Roewer, 1931
- Genus Araucanobunus Muñoz-Cuevas, 1973
- Genus Austromontia Lawrence, 1931 accepted as Austromontia Staręga, 1992
- Genus Austromontia Staręga, 1992
- Genus Austronuncia Lawrence, 1931
- Genus Bezavonia Roewer, 1949
- Genus Biacumontia Lawrence, 1931 accepted as Biacumontia Staręga, 1992
- Genus Biacumontia Staręga, 1992
- Genus Brasiloctis Mello-Leitão, 1938
- Genus Breviacantha Kauri, 1955
- Genus Bryonuncia Hickman, 1958
- Genus Callihamina Roewer, 1940
- Genus Callihamus Roewer, 1931 accepted as Callihamus Hickman, 1958
- Genus Callihamus Hickman, 1958
- Genus Calliuncus Roewer, 1931
- Genus Cenefia Roewer, 1931
- Genus Ceratomontia Roewer, 1915
- Genus Chilenuncia Muñoz-Cuevas, 1971
- Genus Chilobunus Hickman, 1958
- Genus Chrestobunus Roewer, 1915
- Genus Cinuna Hickman, 1958 accepted as Nunciella Roewer, 1930
- Genus Cluniella Forster, 1955
- Genus Conoculus Forster, 1949
- Genus Corinuncia Forster, 1954 accepted as Nuncia Loman, 1902
- Genus Cryptadaeum Lawrence, 1931
- Genus Cryptobunus Lawrence, 1931 accepted as Amatola Lawrence, 1931
- Genus Decarynella Fage, 1945
- Genus Decaynella Fage, 1945 accepted as Decarynella Fage, 1945
- Genus Diaenobunus Roewer, 1915
- Genus Diaria Mello-Leitão, 1939 accepted as Diasia Sørensen, 1902
- Genus Diasa Cekalovic, 1968 accepted as Diasia Sørensen, 1902
- Genus Diasia Sørensen, 1902
- Genus Dingupa Forster, 1952
- Genus Dipristes Roewer, 1931
- Genus Equitius Simon, 1880
- Genus Eubunus Hickman, 1958
- Genus Fresiax Porto, Derkarabetian, Giribet & Pérez-González, 2024
- Genus Glyptobunus Roewer, 1915
- Genus Graemontia Lawrence, 1931 accepted as Graemontia Staręga, 1992
- Genus Graemontia Staręga, 1992
- Genus Gunvoria Kauri, 1961
- Genus Hedwiga Roewer, 1931
- Genus Hedwigia accepted as Hedwiga Roewer, 1931
- Genus Hendea Roewer, 1931
- Genus Hendeola Forster, 1954
- Genus Heteradaeum Lawrence, 1963
- Genus Heteronuncia Roewer, 1920
- Genus Hickmanoxyomma Hunt, 1990
- Genus Holonuncia Forster, 1955
- Genus Hovanuncia Lawrence, 1959
- Genus Ivohibea Lawrence, 1959
- Genus Jenolanicus Roewer, 1915 accepted as Equitius Simon, 1880
- Genus Karamea Forster, 1954
- Genus Laftrachia Porto, Derkarabetian, Giribet & Pérez-González, 2024
- Genus Larifuga Loman, 1898
- Genus Larifugella Lawrence, 1933 accepted as Larifugella Staręga, 1992
- Genus Larifugella Staręga, 1992
- Genus Lautaria Porto, Derkarabetian, Giribet & Pérez-González, 2024
- Genus Lawrencella Strand, 1932
- Genus Leionuncia Hickman, 1958
- Genus Lispomontia Lawrence, 1937
- Genus Lizamontia Kury, 2004
- Genus Lomaella accepted as Lomanella Pocock, 1903
- Genus Mensamontia Lawrence, 1931 accepted as Mensamontia Staręga, 1992
- Genus Mensamontia Staręga, 1992
- Genus Mestonia Hickman, 1958
- Genus Metadaeum Roewer, 1915 accepted as Adaeum Karsch, 1880
- Genus Metanuncia Roewer, 1915
- Genus Micradaeum Lawrence, 1931
- Genus Micromontia Lawrence, 1939
- Genus Micronuncia Forster, 1954 accepted as Nuncia Loman, 1902
- Genus Millomontia Lawrence, 1959
- Genus Millotonyx Lawrence, 1959
- Genus Miobunus Roewer, 1915
- Genus Mistralia Porto, Derkarabetian, Giribet & Pérez-González, 2024
- Genus Monacanthobunus Roewer, 1915 accepted as Equitius Simon, 1880
- Genus Monomontia Lawrence, 1931 accepted as Monomontia Staręga, 1992
- Genus Monomontia Staręga, 1992
- Genus Monoxyomma Pocock, 1903 accepted as Equitius Simon, 1880
- Genus Montadaeum Lawrence, 1931
- Genus Muscicola Forster, 1954
- Genus Nahuelonyx Maury, 1988
- Genus Neonuncia Roewer, 1915
- Genus Nerudiella Porto, Derkarabetian, Giribet & Pérez-González, 2024
- Genus Notonuncia Hickman, 1958
- Genus Nucina Hickman, 1958
- Genus Nuncia Forster, 1954
- Genus Nuncia Loman, 1902
- Genus Nunciella Roewer, 1930
- Genus Nunciella Roewer, 1931 accepted as Nunciella Roewer, 1930
- Genus Nuncioides Hickman, 1958
- Genus Odontonuncia Hickman, 1958
- Genus Paradaeum Lawrence, 1931
- Genus Paramontia Lawrence, 1934
- Genus Paranuncia Roewer, 1915
- Genus Parattahia Roewer, 1915
- Genus Paulianyx Lawrence, 1959
- Genus Peckhamius Roewer, 1915 accepted as Triaenobunus Sörensen in Koch, 1886
- Genus Perthacantha Roewer, 1931
- Genus Phanerobunus Roewer, 1915
- Genus Phoxobunus Hickman, 1958
- Genus Picunchenops Maury, 1988
- Genus Planimontia Kauri, 1961
- Genus Prasma Roewer, 1931
- Genus Prasmiola Forster, 1954
- Genus Pristobunus Roewer, 1931
- Genus Promecostethus Enderlein, 1909
- Genus Psalenoba Roewer, 1931
- Genus Pyenganella Hickman, 1958
- Genus Pythora Sørensen in Koch (Keyserling), 1886 accepted as Triaenonyx Sørensen in Koch, 1886
- Genus Rhynchobunus Hickman, 1958
- Genus Roewerania Lawrence, 1934
- Genus Roeweria Lawrence, 1931 accepted as Lawrencella Strand, 1932
- Genus Rostromontia Lawrence, 1931 accepted as Rostromontia Staręga, 1992
- Genus Rostromontia Staręga, 1992
- Genus Rydrusa Roewer, 1931 accepted as Equitius Simon, 1880
- Genus Soerensella Roewer, 1914 accepted as Soerensenella Pocock, 1903
- Genus Soerensenella Pocock, 1903
- Genus Sorensenella Pocock, 1903 accepted as Soerensenella Pocock, 1903
- Genus Sörensenella Pocock, 1903 accepted as Soerensenella Pocock, 1903
- Genus Speleomontia Lawrence, 1931
- Genus Spinimontia Roewer, 1915 accepted as Acumontia Loman, 1898
- Genus Stylonuncia Hickman, 1958
- Genus Tanalaius Roewer, 1915 accepted as Acumontia Loman, 1898
- Genus Tasmanobunus Hickman, 1958 accepted as Miobunus Roewer, 1915
- Genus Tasmanonuncia Hickman, 1958
- Genus Tasmanonyx Hickman, 1958
- Genus Thelbunus Hickman, 1958
- Genus Triacumontia Roewer, 1915 accepted as Acumontia Loman, 1898
- Genus Triaenobletus Roewer, 1931 accepted as Prasma Roewer, 1931
- Genus Triaenobunus Sörensen in Koch, 1886
- Genus Triaenomontia Roewer, 1915
- Genus Triaenonychoides Soares, 1968 †
- Genus Triaenonyx Sørensen in Koch, 1886
- Genus Trianonychoides Cekalovic, 1985 accepted as Triaenonychoides Soares, 1968 †
- Genus Triconobunus Roewer, 1914
- Genus Triregia Forster, 1948
- Genus Valdivionyx Maury, 1988
- Species Valdivionyx crassipes Maury, 1988
- Genus Yatala Roewer, 1940
- Genus Yulella Lawrence, 1939
- Family Trionyxellidae Roewer, 1912
- Family Troglosironidae Shear, 1993
- Family Trogulidae Sundevall, 1833
- Family Troguloidea incertae sedis
- Family Zalmoxidae
- Family Zalmoxioidae Sørensen in L. Koch, 1886 accepted as Zalmoxidae
- Family Zalmoxoidea incertae sedis
- Genus Bicnia Kishida
- Genus Devonopilio Tihelka, Tian & Cai, 2020 †
- Genus Hasseltides Weyenbergh, 1869 †
- Genus Siva Kishida
- Order Opilionida accepted as Opiliones
- Order Oribatida
- Order Palaeoscorpiones †
- Order Palpigradi
- Order Parasitiformes (awaiting allocation)
- Order Phalangiotarbida
- Order Protoscorpiones †
- Order Pseudoscorpionida
- Order Ricinulei
- Order Ricinuleida accepted as Ricinulei
- Order Schizomida
- Order Scorpiones
- Order Scorpionida accepted as Scorpiones
- Order Solifugae
- Order Solpugida accepted as Solifugae
- Order Trigonotarbida †
- Order Trombidiformes
- Order Uropygi
- Class Merostomata accepted as Xiphosura
- Class Pycnogonida
- Class Xiphosura
- Order Chasmataspidida †
- Order Cyrtoctenida † accepted as Eurypterida †
- Order Eurypterida †
- Order Mollisoniida †
- Family Bunodidae Packard, 1886 †
- Family Offacolidae Sutton, Briggs, Siveter, Siveter & Orr, 2002 †
- Family Pseudoniscidae Packard, 1886 †
- Family Weinberginidae Richter & Richter, 1929 † accepted as Chelicerata
- Genus Anderella Moore, McKenzie & Lieberman, 2007 †
- Genus Borchgrevinkium Novojilov, 1958 †
- Genus Camanchia Moore, Briggs, Braddy & Shultz, 2011 †
- Genus Lagrandella Eldredge, 1974 † accepted as Legrandella Eldredge, 1974 †
- Genus Legrandella Eldredge, 1974 †
- Genus Sarotrocercus Whittington, 1981 †
- Genus Setapedites Lustri, Gueriau & Daley, 2024 †
- Genus Titanoprosoma Bicknell, Kimmig, Smith & Scherer, 2024 †
- Genus Venustulus Moore in Moore et al., 2005 †
- Genus Weinbergina Richter & Richter, 1929 †
- Subphylum Crustacea
- 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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