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
- Family Trionyxellidae Roewer, 1912
- Family Troglosironidae Shear, 1993
- Family Trogulidae Sundevall, 1833
- Family Troguloidea incertae sedis
- Family Zalmoxidae
- Genus Absonus González-Sponga, 1987
- Genus Acrozalmoxis Roewer, 1915
- Genus Actinobunus Goodnight, 1941 accepted as Parascotolemon Roewer, 1912
- Genus Adornellus Roewer, 1949 accepted as Stygnoleptes Banks, 1914
- Genus Araguita González-Sponga, 1987
- Genus Avilaia González-Sponga, 1998
- Genus Azaca Goodnight, 1942 accepted as Ethobunus Chamberlin, 1925
- Genus Azulitaia González-Sponga, 1987
- Genus Bleptocherses Mello-Leitão, 1938 accepted as Stygnoleptes Banks, 1914
- Genus Brimma Roewer, 1949 accepted as Pachylicus Roewer, 1923
- Genus Bunofagea Lawrence, 1959 accepted as Bunofagea Staręga, 1992
- Genus Bunofagea Staręga, 1992
- Genus Buruquelia González-Sponga, 1999
- Genus Camanastus Roewer, 1949
- Genus Carayaca González-Sponga, 1998
- Genus Cea González-Sponga, 1987
- Genus Cerroa Roewer, 1928 accepted as Pachylicus Roewer, 1923
- Genus Cersa Silhavy, 1979
- Genus Chamaia González-Sponga, 1987
- Genus Chersobleptes Sørensen, 1932 accepted as Stygnoleptes Banks, 1914
- Genus Chirimena González-Sponga, 1999
- Genus Chondrobunus Loman, 1902 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Cinortina Mello-Leitão, 1935 accepted as Ethobunus Chamberlin, 1925
- Genus Cippanus Roewer, 1933 accepted as Stygnoleptes Banks, 1914
- Genus Costabrimma Goodnight & Goodnight, 1983
- Genus Cubiria González-Sponga, 1987
- Genus Curimagua González-Sponga, 1987 accepted as Curimaguanus González-Sponga in Kury, 2003
- Genus Curimaguanus González-Sponga in Kury, 2003
- Genus Cynortina Banks, 1909 accepted as Ethobunus Chamberlin, 1925
- Genus Dapessus Roewer, 1933 accepted as Ethobunus Chamberlin, 1925
- Genus Ethobunus Chamberlin, 1925
- Genus Euzalmoxis Roewer, 1915 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Fissiphallius Martens, 1988 †
- Genus Foella Goodnight & Goodnight, 1948 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Gagirius Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Galanomma Juberthie, 1970
- Genus Garanhunsa Roewer, 1949
- Genus Gjellerupia Roewer, 1913
- Species Gjellerupia minima Roewer, 1915
- Species Gjellerupia neoguinensis Roewer, 1913
- Species Gjellerupia pallicolor (Strand, 1910)
- Genus Gjellerupiola Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Glizotus Roewer, 1949 accepted as Ethobunus Chamberlin, 1925
- Genus Granulaia González-Sponga, 1998
- Genus Guagonia González-Sponga, 1987
- Genus Guayania González-Sponga, 1999
- Genus Haitonia González-Sponga, 1987
- Genus Heteroscotolemon Roewer, 1912
- Genus Hewus Goodnight, 1942 accepted as Ethobunus Chamberlin, 1925
- Genus Hoplozalmoxis Roewer, 1915 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Jajinia González-Sponga, 1987
- Genus Junquito González-Sponga, 1999
- Genus Kalina Goodnight, 1942 accepted as Ethobunus Chamberlin, 1925
- Genus Lara González-Sponga, 1987
- Genus Letesia Goodnight & Goodnight, 1953 accepted as Ethobunus Chamberlin, 1925
- Genus Linabia Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Linobia Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Metagjellerujia Goodnight & Goodnight, 1947 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Metapachylus Cambridge, 1905 accepted as Pyropharynx Kury & Alonso-Zarazaga, 2011
- Genus Metazalmoxis Roewer, 1912
- Genus Mexscotolemon Goodnight, 1942 accepted as Pachylicus Roewer, 1923
- Genus Micro González-Sponga, 1987
- Genus Minuides Sørensen, 1932
- Genus Mitraia Kury & Alonso-Zarazaga, 2011
- Genus Mochlus Roewer, 1933 accepted as Stygnoleptes Banks, 1914
- Genus Neobabrius Roewer, 1949
- Genus Neocea Özdikmen, 2008
- Genus Oo Kury & Alonso-Zarazaga, 2011
- Genus Opilioparamo Özdikmen, 2008
- Genus Orituco González-Sponga, 1987
- Genus Ovalia González-Sponga, 1999
- Genus Pachylichus Roewer, 1923 accepted as Pachylicus Roewer, 1923
- Genus Pachylicus Roewer, 1923
- Genus Panaquire González-Sponga, 1987
- Genus Panopiliops Roewer, 1949
- Genus Panoplia Roewer, 1949 accepted as Panopiliops Roewer, 1949
- Genus Papuastus Roewer, 1949
- Genus Papuodes Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Paraminuella Caporiacco, 1951
- Genus Paramo González-Sponga, 1987
- Genus Parascotolemon Roewer, 1912
- Genus Parazalmoxida Roewer, 1917 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Parisminia Roewer, 1949 accepted as Ethobunus Chamberlin, 1925
- Genus Phalangodinella Caporiacco, 1951
- Genus Phalangoduna Roewer, 1949
- Genus Piercenia Roewer, 1934 accepted as Stygnoleptes Banks, 1914
- Genus Pijiguaia González-Sponga, 1998
- Genus Pilosa González-Sponga, 1999
- Genus Pirassunungoleptes Scares, 1966
- Genus Porascotolemon Roewer, 1927 accepted as Parascotolemon Roewer, 1912
- Genus Protodiasia Ringuelet, 1954
- Genus Pygozalmoxis Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Pyropharynx Kury & Alonso-Zarazaga, 2011
- Genus Remyus Roewer, 1949
- Genus Resinthicus Roewer, 1949 accepted as Ethobunus Chamberlin, 1925
- Genus Retropedis González-Sponga, 1987
- Genus Savoa Forster, 1949
- Genus Sempalus Roewer, 1949 accepted as Phalangoduna Roewer, 1949
- Genus Sepikusta Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Sivianus Roewer, 1949
- Genus Soledadiella González-Sponga, 1987
- Genus Sphingonus Roewer, 1949 accepted as Ethobunus Chamberlin, 1925
- Genus Sphoeroforma González-Sponga, 1987
- Genus Spiniella González-Sponga, 1987
- Genus Stygnoleptes Banks, 1914
- Genus Taguaza González-Sponga, 2000
- Genus Tegipiolus Roewer, 1949
- Genus Tetesia Roewer, 1949 accepted as Ethobunus Chamberlin, 1925
- Genus Tiara González-Sponga, 1987
- Genus Timeleon Mello-Leitão, 1935 accepted as Timoleon Sørensen, 1932
- Genus Timoleon Sørensen, 1932
- Genus Traiania Soares & Avram, 1981
- Genus Unare González-Sponga, 1987
- Genus Unicornia González-Sponga, 1987
- Genus Urachiche González-Sponga, 1987
- Genus Venezuelana Özdikmen, 2008
- Genus Viacha Roewer, 1949
- Genus Weyrauchiana Roewer, 1952
- Genus Yacambuia González-Sponga, 1987
- Genus Zalmoxana Roewer, 1927 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Zalmoxida Roewer, 1912
- Genus Zalmoxilla Roewer, 1926 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Zalmoxis Sörensen in Koch, 1886
- Genus Zalmoxis Thorell, 1891 accepted as Zalmoxida Roewer, 1912
- Genus Zalmoxissus Roewer, 1949 accepted as Zalmoxis Sörensen in Koch, 1886
- Genus Zalmoxomma Roewer, 1949
- 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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