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
- Order Opilionida accepted as Opiliones
- Order Oribatida
- Order Palaeoscorpiones †
- Order Palpigradi
- Order Parasitiformes (awaiting allocation)
- Order Phalangiotarbida
- Order Protoscorpiones †
- Order Pseudoscorpionida
- Family Atemnidae Chamberlin, 1931
- Family Bochicidae J.C. Chamberlin, 1930
- Family Cheiridiidae Chamberlin, 1924
- Family Cheliferidae Stecker, 1874
- Family Chernetidae Schawaller, 1991
- Genus Acanthicochernes Beier, 1964
- Genus Acuminochernes Hoff, 1949
- Genus Adelphochernes Beier, 1937
- Species Adelphochernes aethiopicus Beier, 1944 accepted as Caffrowithius aethiopicus (Beier, 1944)
- Species Adelphochernes mindanensis Beier, 1937
- Species Adelphochernes mindoroensis Beier, 1966
- Genus Adelphochernes Beier, 1944 accepted as Caffrowithius Beier, 1932
- Genus Allochernes Beier, 1933
- Genus Americhernes Muchmore, 1976
- Genus Anaperochernes Beier, 1964
- Genus Ancalochernes Beier, 1933
- Genus Anepsiochernes Beier, 1947 accepted as Caffrowithius Beier, 1932
- Genus Anthrenochernes Lohmander, 1939
- Genus Antillochernes Muchmore, 1984
- Genus Apatochernes Beier, 1948
- Genus Argentochernes Beier, 1933 accepted as Parachernes Chamberlin, 1931
- Genus Asterochernes Beier, 1955
- Genus Atherochernes Beier, 1954
- Genus Attaleachernes Mahnert, 2009
- Genus Austinochernes Harvey, 2020
- Genus Austrochernes Beier, 1933
- Genus Balgachernes Harvey, 2018
- Genus Barbaraella Harvey, 1995
- Genus Bipeltochernes Dashdamirov, 2005
- Genus Bituberochernes Muchmore, 1974
- Genus Byrsochernes Beier, 1959
- Genus Caccoxylus
- Genus Cacoxylus Beier, 1965
- Genus Caffrowithius Beier, 1932
- Genus Calidiochernes Beier, 1954
- Genus Calymmachernes Beier, 1954
- Genus Caribochernes Beier, 1976
- Genus Ceratochernes Mahnert, 1994
- Genus Ceriochernes Beier, 1937
- Genus Chelanops Gervais in Gay, 1849
- Genus Chelodamus Chamberlin, 1925
- Genus Chernes Menge, 1855
- Genus Chiridiochernes Muchmore, 1972
- Genus Chrysochernes Hoff, 1956
- Genus Cocinachernes Hentschel & Muchmore, 1989
- Genus Conicochernes Beier, 1948
- Genus Coprochernes Beier, 1976
- Genus Cordylochernes Beier, 1932
- Genus Corosoma Karsch, 1879
- Genus Corticochernes van den Tooren, 2008
- Genus Cyclochernes Beier, 1970
- Genus Dasychernes Chamberlin, 1929
- Genus Dendrochernes Beier, 1933
- Genus Dinocheirus Chamberlin, 1929
- Genus Dinochernes Beier, 1933
- Genus Diplothrixochernes Beier, 1962
- Genus Epactiochernes Muchmore, 1974
- Genus Epaphochernes Beier, 1933 accepted as Dinocheirus Chamberlin, 1929
- Genus Epichernes Muchmore in Muchmore & Hentschel, 1982
- Genus Eumecochernes Beier, 1933
- Genus Gelachernes Beier, 1940
- Genus Gigantochernes Beier, 1933
- Genus Gobichernes Krumpál & Kiefer, 1982
- Genus Gomphochernes Beier, 1932
- Genus Goniochernes Beier, 1933
- Genus Gressittochernes Beier, 1957 accepted as Smeringochernes Beier, 1957
- Genus Haplochernes Beier, 1933
- Genus Hebridochernes Beier, 1945
- Genus Hesperochernes Chamberlin, 1924
- Genus Heterochernes Beier, 1966
- Genus Hexachernes Beier, 1953
- Genus Illinichernes Hoff, 1949
- Genus Incachernes Beier, 1933
- Genus Indochernes Murthy & Ananthakrishnan, 1977
- Genus Interchernes Muchmore, 1980
- Genus Lamprochernes Tömösváry, 1882
- Genus Lasiochernes Beier, 1933
- Genus Lustrochernes Beier, 1932
- Genus Macrochernes Hoff, 1946
- Genus Maorichernes Beier, 1933
- Genus Marachernes Harvey, 1992
- Genus Maxchernes Feio, 1960
- Genus Mayachernes Riquelme, Piedra-Jiménez, Córdova-Tabares & Luna-Castro, 2014 †
- Genus Megachernes Beier, 1933
- Genus Meiochernes Beier, 1957
- Genus Mesochernes Beier, 1932
- Genus Metagoniochernes Vachon, 1939
- Genus Mexachernes Hoff, 1947
- Genus Microchernes Beier, 1951 accepted as Verrucachernes Chamberlin, 1947
- Genus Mirochernes Beier, 1930
- Genus Mucrochernes Muchmore, 1973
- Genus Muscichernes Morikawa, 1960 accepted as Lamprochernes Tömösváry, 1882
- Genus Neoallochernes Hoff, 1947
- Genus Neochelanops Beier, 1964 accepted as Chelanops Gervais in Gay, 1849
- Genus Neochernes Beier, 1933
- Genus Nesidiochernes Beier, 1957
- Genus Nesiotochernes Beier, 1976
- Genus Nesochernes Beier, 1933
- Genus Nudochernes Beier, 1935
- Genus Ochrochernes Beier, 1933
- Genus Odontochernes Beier, 1932
- Genus Oligochernes Beier, 1937 †
- Genus Opsochernes Beier, 1966
- Genus Orochernes
- Genus Pachycheirus Chamberlin, 1934 accepted as Dendrochernes Beier, 1933
- Genus Pachychernes Beier, 1932
- Genus Paracanthicochernes Beier, 1966
- Genus Parachernes Chamberlin, 1931
- Genus Parapilanus Beier, 1973
- Genus Paraustrochernes Beier, 1966
- Genus Parazaona Beier, 1932
- Genus Pelorus Koch, 1843 accepted as Lustrochernes Beier, 1932
- Genus Petterchernes Heurtault, 1986
- Genus Phaulochernes Beier, 1976
- Genus Phoberocheirus Chamberlin, 1949 accepted as Acuminochernes Hoff, 1949
- Genus Phymatochernes Mahnert, 1979
- Genus Pilanus Beier, 1930
- Genus Plesiochernes Vachon, 1945 accepted as Caffrowithius Beier, 1932
- Genus Pselaphochernes Beier, 1933
- Genus Pseudopilanus Beier, 1957
- Genus Pseudozaona Beier, 1933 accepted as Chelodamus Chamberlin, 1925
- Genus Pycnochernes Beier, 1932 accepted as Lamprochernes Tömösváry, 1882
- Genus Reginachernes Hoff, 1949 accepted as Chernes Menge, 1855
- Genus Reischekia Beire, 1948
- Genus Rhinochernes Beier, 1954
- Genus Rhopalochernes Beier, 1933
- Genus Satrapanus Harvey & Volschenk, 2007
- Genus Scapanochernes Beier, 1933 accepted as Parachernes Chamberlin, 1931
- Genus Selachochernes Mahnert, 2011
- Genus Semeiochernes Beier, 1933
- Genus Sinochernes Gao & Zhang, 2013
- Genus Smeringochernes Beier, 1957
- Genus Spelaeochernes Mahnert, 2001
- Genus Sphenochernes Turk, 1953
- Genus Stigmachernes Beier, 1957
- Genus Sundochernes Beier, 1933
- Genus Sundowithius Beier, 1932
- Genus Syndeipnochernes Beier, 1970 accepted as Sphenochernes Turk, 1953
- Genus Systellochernes Beier, 1964
- Genus Tejachernes Hoff, 1957
- Genus Tenebriochernes Bedoya-Roqueme & Torres, 2019
- Genus Teratochernes Beier, 1957
- Genus Thalassochernes Beier, 1945
- Genus Thapsinochernes Beier, 1957
- Genus Toxochernes Beier, 1932 accepted as Toxochernes Finnegan, 1934
- Genus Toxochernes Finnegan, 1934 accepted as Chernes Menge, 1855
- Genus Trachychernes Tömösváry, 1882 accepted as Chernes Menge, 1855
- Genus Troglochernes Beier, 1969
- Genus Tuberochernes Muchmore, 1997
- Genus Tullgrenia Mello-Leitao, 1925 accepted as Sphenochernes Turk, 1953
- Genus Tychochernes Hoff, 1956
- Genus Verrucachernes Chamberlin, 1947
- Genus Wyochernes Hoff, 1949
- Genus Xenochernes Feio, 1945
- Genus Zaona Chamberlin, 1925
- Family Chieridiidae
- Family Chthonidae accepted as Chthoniidae Hansen, 1894
- Family Chthoniidae Hansen, 1894
- Family Dithidae Chamberlin, 1929 accepted as Tridenchthoniidae Balzan, 1892
- Family Dracochelidae Schawaller, Shear & Bonamo, 1991 †
- Family Feaellidae Ellingsen, 1906
- Family Garypidae Hansen, 1894
- Family Garypinidae Daday, 1889
- Family Geogarypidae J.C. Chamberlin, 1930
- Family Gymnobisiidae Beier, 1947
- Family Hyidae J.C. Chamberlin, 1930
- Family Ideoroncidae J.C. Chamberlin, 1930
- Family Larcidae Harvey, 1992
- Family Lechytiidae J.C. Chamberlin, 1929
- Family Menthidae J.C. Chamberlin, 1930
- Family Miratemnidae
- Family Myrmochernetidae
- Family Neobisiidae Chamberlin, 1930
- Family Obisiidae accepted as Cheliferidae Stecker, 1874
- Family Olipiidae accepted as Olpiidae Chamberlin, 1930
- Family Olpiidae Chamberlin, 1930
- Family Parahyidae Harvey, 1992
- Family Pseudochiridiidae J.C. Chamberlin, 1923
- Family Pseudogarypidae Chamberlin, 1923
- Family Pseudoscorpionida (awaiting allocation)
- Family Pseudoscorpionida incertae sedis
- Family Sternophoridae J.C. Chamberlin, 1923
- Family Syarinidae J.C. Chamberlin, 1930
- Family Synsphyronidae Beier, 1932 accepted as Garypidae Hansen, 1894
- Family Tridenchthoniidae Balzan, 1892
- Family Vachoniidae J.C. Chamberlin, 1947
- Family Withiidae J.C. Chamberlin, 1931
- 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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