Period: 488 million to 472 million years ago.
	Fishes (10)
	Entire range
	†Cordylodus (Genus) Pander, 1856
	†Drepanoistodus (Genus) Lindstrom, 1971
	†Fryxellodontus (Genus) Miller, 1969
	†Microzarkodina (Genus) Lindstrom, 1971
	†Scandodus (Genus) Lindström, 1954
	Lower limit
	†Scolopodus (Genus) Pander, 1856
	Within limits
	†Conodonta (Superclass) Eichenberg, 1930 see (Class) †Conodonta Eichenberg, 1930 - conodonts
	†Distacodontina (Order)
	†Osteostraci ([unranked]) Lankester, 1868
	Pisces (Superclass) Linnaeus, 1758 - fishes
	Vertebrates (4)
	Within limits
	†Thelodonti (Superclass) Jaekel, 1911 see (Superclass) †Thelodontomorphi Jaekel, 1911 - thelodonts
	Vertebrata (Subphylum) Cuvier, 1812 see (Infraphylum) Vertebrata Lamarck, 1801 - vertebrates
	Vertebrata (Phylum) Lamarck, 1801 see (Infraphylum) Vertebrata Lamarck, 1801
	Vertebrata ([unranked]) Lamarck, 1801 see (Infraphylum) Vertebrata Lamarck, 1801 - vertebrates
	Echinoderms (28)
	Entire range
	†Mesocystis (Genus) Bather, 1898
	†Phyllocystis (Genus) Thoral, 1935
	Lower limit
	Asteroidea (Class) Blainville, 1830 - sea stars
	Asteroidea (Subclass) Blainville, 1830 see (Class) Asteroidea Blainville, 1830 - starfishes
	Asterozoa (Subphylum) von Zittel, 1895 see (Infraphylum) Asterozoa von Zittel, 1895
	†Camerates (Subclass)
	†Diploporita (Class) Müller, 1854
	†Inadunates (Subclass)
	†Ophiocistioidea (Class) (Sollas, 1899)
	Ophiuroidea (Class) Gray, 1840 - brittle stars and basket stars
	Ophiuroidea (Subclass) Gray, 1840 see (Class) Ophiuroidea Gray, 1840 - brittle stars
	†Parablastoidea (Class) Hudson, 1907
	†Paracrinoidea (Class) Regnell, 1945
	Platyasterida (Order) Spencer, 1951
	†Rhombifera (Class) Pérès, 1956
	Somasteroidea (Subclass) Spencer, 1951 see (Order) Platyasterida Spencer, 1951
	Within limits
	†Blastozoa (Subphylum) Sprinkle, 1973 see (Infraphylum) †Blastozoa Sprinkle, 1973
	†carpoids ([unranked]) see (Class) †Carpoidea Jaekel, 1918
	Crinoidea (Class) Miller, 1821 - sea lilies and feather stars
	Crinozoa (Subphylum) Matsumoto, 1929 see (Infraphylum) Crinozoa Matsumoto, 1929
	Echinodermata (Phylum) Bruguière, 1789 - echinoderms
	Echinozoa (Subphylum) von Zittel, 1895 see (Infraphylum) Echinozoa Haeckel, in Von Zittell, 1895
	†Edrioasteroidea (Class) Billings, 1858
	†Eocrinoidea (Class) Jaekel, 1918
	Holothuroidea (Class) (de Blainville, 1834) - sea cucumbers
	†Homalozoa (Subphylum) Whitehouse, 1941
	†Homoiostelea (Class) Gill & Caster, 1960
	†Stylophora (Class) Gill & Caster, 1960 - stylophorans
	Crustaceans (15)
	Within limits
	Bairdia (Genus) McCoy, 1844
	Branchiopoda (Class) Latreille, 1817 - branchiopods
	Cephalocarida (Class) H.L. Sanders, 1955 - cephalocarids
	Crustacea (Superclass) Pennant, 1777 see ([unranked]) Crustaceomorpha Chernyshev, 1960 - crustaceans
	Eucrustacea (Epiclass) Kingsley, 1894 see (Subphylum) Pancrustacea Zrzavý et al., 1997
	†Eurychilinidae (Family) Ulrich & Bassler, 1923
	†Leperditicopida (Order) Scott, 1961
	Malacostraca (Class) Latreille, 1802
	Myodocopida (Order) Sars, 1866
	Ostracoda (Class) Latreille, 1802 - ostracods
	Ostracoda (Subclass) Latreille, 1806 see (Class) Ostracoda Latreille, 1802 - ostracods
	†Palaeocopida (Order) Henningsmoen, 1953 see (Suborder) †Palaeocopina Henningsmoen, 1953
	Phyllocarida (Subclass) Packard, 1879 - leptostracans
	Platycopida (Order) Sars, 1866
	Podocopida (Order) (Sars, 1866) G.W. Müller, 1894
	Arthropods (35)
	Entire range
	†Asaphus (Genus) Brongniart, 1822
	†Chasmataspida (Order) see (Order) †Chasmataspidida Caster & Brooks, 1956
	†Illaenus sarsi Jaanusson, 1954
	†Opipeuter angularis (Young, 1973)
	†Opipeuter emanuelensis emanuelensis Legg, 1976
	†Opipeuter emanuelensis princeps Shergold, in Laurie & Shergold, 1996
	†Opipeuter emanuelensis remorator Shergold, in Laurie & Shergold, 1996
	†Opipeuter emanuelensis translator Shergold, in Laurie & Shergold, 1996
	†Opipeuter inconnivus Fortey, 1974
	†Opipeuter insignis Henderson, 1983
	†Opipeuter priscus (Shergold, in Laurie & Shergold, 1996)
	Lower limit
	†Illaenus (Genus) Dalman, 1827
	Within limits
	†Agnostida (Order) Salter, 1864
	Arthropoda (Phylum) Siebold, 1848 - arthropods
	†Chasmataspidida (Order) Caster & Brooks, 1956
	Chelicerata (Subphylum) Heymons, 1901
	Chelicerata (Superclass) Heymons, 1901 see (Subphylum) Chelicerata Heymons, 1901
	Crustacea (Subphylum) Brünnich, 1772 see (Superclass) Crustacea Pennant, 1777 - crustaceans
	Euchelicerata ([unranked]) Weygoldt & Paulus, 1979
	†Eurypterida (Order) Burmeister, 1843 - eurypterids
	†Marellomorpha (Subphylum) see (Subphylum) †Marrellomorpha Beurlen, 1934 - lace crabs
	Merostomata (Class) Dana, 1852 see (Class) Xiphosura Latreille, 1802 - horseshoe crabs
	†Naraoia (Genus) Walcott, 1912
	†Naraoiidae (Family) Walcott, 1912
	†Nektaspida (Order) Raymond, 1920 see (Class) †Nektaspida Raymond, 1920 - nektaspids
	Onychophora (Superclass) Grube, 1853 see (Phylum) Onychophora Grube, 1853
	Pentastomida ([unranked]) see (Subclass) Pentastomida Diesing, 1836
	†Polymerida (Order)
	Pycnogonida (Class) Latreille, 1810 - pycnogonids
	†Trilobita (Class) Walch, 1771 - trilobites
	†Trilobita (Infraphylum) Walch, 1771 see (Class) †Trilobita Walch, 1771 - trilobites
	†Trilobitomorpha (Subphylum) Størmer, 1944 see (Superclass) †Trilobitomorpha Størmer, 1944 - trilobites
	†Trilobitomorpha (Superclass) Størmer, 1944, stat. inval. see (Superclass) †Trilobitomorpha Størmer, 1944
	Xiphosura (Class) Latreille, 1802 - horseshoe crabs
	Xiphosurida (Order) Latreille, 1802
	Molluscs (50)
	Entire range
	†Apoptopegma (Genus) Pojeta, Gilbert-Tomlinson & Shergold, 1977
	†Ceratopea (Genus) Ulrich, 1911
	†Chelodes (Genus) Davidson & King, 1874
	†Copidens (Genus) Pojeta & Gilbert-Tomlinson, 1977
	†Euchasma (Genus) Billings, 1865
	†Noradonta (Genus) Pojeta & Gilbert-Tomlinson, 1977
	†Pauropegma (Genus) Pojeta, Gilbert-Tomlinson & Shergold, 1977
	†Ptychopegma (Genus) Pojeta, Gilbert-Tomlinson & Shergold, 1977
	†Ribeiria lucan (Walcott, 1924)
	†Technophorus coreanicus (Kobayashi, 1934) Pojeta & Runnegar, 1976:58, pl.11
	Lower limit
	†Bransonia (Genus) Pojeta & Runnegar, 1976
	†Eopteria (Genus) Billings, 1865
	Euomphalina (Suborder) de Koninck, 1881 see (Superfamily) †Euomphaloidea White, 1877
	Heteroconchia (Subclass) Gray, 1854 see (Superorder) Heteroconchia Gray, 1854
	†Macluritina (Suborder) Cox & Knight, 1960 see (Superfamily) †Macluritoidea Carpenter, 1861
	Pteriomorphia (Subclass) Beurlen, 1944 see (Superorder) Pteriomorphia Beurlen, 1944
	†Technophorus (Genus) Miller, 1889
	†Tolmachovia (Genus) Howell & Kobayashi, 1936
	Trochina (Suborder) (Cox & Knight, 1960) see (Superfamily) Trochoidea Rafinesque, 1815
	Within limits
	†Actinoceratoidea (Subclass) Teichert et al., 1964
	Amphineura (Subphylum) see (Phylum) Mollusca Linnaeus, 1758
	Archaeogastropoda (Order) Thiele, 1925 see (Order) Vetigastropoda Salvini-Plawen, 1980
	†Bellerophontida (Order) Ulrich & Scofield, 1897 see (Superfamily) †Bellerophontoidea McCoy, 1852
	Bivalvia (Class) Linnaeus, 1758 - bivalves
	Cephalopoda (Class) Cuvier, 1795 - cephalopods
	†Conocardioida (Order) Neumayr, 1891
	†Cyclonema (Genus) Hall, 1852
	†Cyrtonellida (Order) Horny, 1963
	Cyrtosoma (Subphylum) Runnegar & Pojeta Jr., 1974 see (Phylum) Mollusca Linnaeus, 1758
	Diasoma (Subphylum) Runnegar & Pojeta Jr., 1974 see (Phylum) Mollusca Linnaeus, 1758
	†Endoceratoidea (Subclass) Teichert, 1933
	Gastropoda (Class) Cuvier, 1795 - snails and slugs
	†Hyolitha ([unranked]) see (Phylum) †Hyolitha (Marek, 1963)
	†Hyolithida (Order) Matthew, 1899
	Isofilibranchia (Subclass) Iredale, 1939 see (Superorder) Isofilibranchia Iredale, 1939
	†Mimospira (Genus) Perner, 1925
	Mollusca (Phylum) Linnaeus, 1758 - molluscs
	Murchisoniina (Suborder) Cox & Knight, 1960 see (Superfamily) †Murchisonioidea Koken, 1896
	Nautiloidea (Subclass) Agassiz, 1848
	Nautilus (Genus) Linnaeus, 1758
	†Onychochilina (Suborder)
	Palaeotaxodonta (Subclass) Korobkov, 1954 see (Subclass) Protobranchia Pelseneer, 1889
	Pelecypoda (Class) Goldfuss, 1820 see (Class) Bivalvia Linnaeus, 1758
	†Pinnocaris (Genus) Etheridge, 1878
	Pleurotomariina (Suborder) (Cox & Knight, 1960) see (Superfamily) Pleurotomarioidea Swainson, 1840
	Prosobranchia (Subclass) Milne-Edwards, 1848 see (Class) Gastropoda Cuvier, 1795 - prosobranchs
	†Ribeiria (Genus) Sharpe, 1853
	†Ribeirioida (Order) Kobayashi, 1933
	†Rostroconchia (Class) Pojeta et al., 1972
	Tryblidiida (Order) Lemche, 1957 see (Order) Monoplacophorida Wenz, in Knight, 1952
	Annelids (5)
	Entire range
	†Kadriorgaspis (Genus) Hints, 2006
	†Kadriorgaspis kaisae Hints, 2006
	†Xanioprion viivei Hints, 2006
	Within limits
	Annelida (Phylum) Lamarck, 1809 - segmented worms
	Polychaeta (Class) Grube, 1850 - polychaetes
	Sponges (43)
	Within limits
	Amphidiscophora (Subclass) Schulze, 1886
	Amphidiscosa (Order) Schrammen, 1924 see (Order) Amphidiscosida Schrammen, 1924
	Amphidiscosida (Order) Schrammen, 1924
	†Anthaspidellidae (Family) Miller, 1889
	†Astraeospongiidae (Family) Miller, 1889
	†Astylospongiidae (Family) Zittel, 1877
	†Brachiospongiidae (Family) Beecher, 1889
	Calcarea (Class) Bowerbank, 1864 - calcareous sponges
	Ceractinomorpha (Subclass) Lévi, 1953 see (Class) Demospongiae Sollas, 1885
	†Chiastoclonellidae (Family) Rauff, 1895
	†Choiidae (Family) de Laubenfels, 1955
	Clionaidae (Family) d'Orbigny, 1851
	Clionidae (Family) d'Orbigny, 1851, nom. illeg. see (Family) Clionaidae d'Orbigny, 1851
	†Cnemidiastridae (Family) Schrammen, 1924
	Demospongea (Class) Sollas, 1875 see (Class) Demospongiae Sollas, 1885
	Demospongiae (Class) Sollas, 1885 - demosponges
	†Dictyospongiidae (Family) Hall & Clarke, 1898
	†Dictyospongioidea (Superfamily) Hall & Clarke, 1899
	†Dierespongioidea (Superfamily) Rigby & Gutschick 1976
	Hadromerida (Order) Topsent, 1894
	†Heteractinida (Order) Hinde, 1887 see (Class) †Heteractinida de Laubenfels, 1955
	Hexactinellida (Class) Schmidt, 1870 - hexactinellids
	Hexasterophora (Subclass) Schulze, 1886
	†Hintzespongiidae (Family) Finks, 1983
	†Hintzespongioidea (Superfamily) Finks, 1983
	Lithistida (Order) Schmidt, 1870 see (Subclass) Lithistida Schmidt, 1870 - lithistids
	Lyssacinosa (Order) Zittel, 1877 see (Order) Lyssacinosida Zittel, 1877
	Lyssacinosida (Order) Zittel, 1877
	†Orchocladina (Suborder) Rauff, 1893 see (Order) †Orchocladina Rauff, 1895
	†Piraniidae (Family) de Laubenfels, 1955
	Porifera (Phylum) Grant, 1836 - sponges
	†Protospongiidae (Family) Hinde, 1887
	†Protospongioidea (Superfamily) Hinde, 1887
	†Reticulosa (Order) Reid, 1958
	Rhizomorina (Suborder) Zittel, 1895
	Solenida (Order) de Laubenfels, 1955
	Sphaerocladina (Suborder) Schrammen, 1910
	†Sphinctozoa (Order) (Steinmann, 1882)
	†Stromatopora (Genus) Goldfuss, 1826
	†Stromatoporoida (Order) see (Class) †Stromatoporoidea Nicholson & Murie, 1878
	Tetracladina (Suborder) Zittel, 1878
	Tetractinomorpha (Subclass) Lévi, 1953 see (Class) Demospongiae Sollas, 1885
	Verongida (Order) Bergquist, 1978
	Invertebrates (113)
	Upper limit
	†Acrotheloidea (Superfamily) Walcott, 1908
	†Billingsellacea (Superfamily) see (Superfamily) †Billingselloidea Schuchert, 1893
	†Billingsellidina (Suborder) Schuchert, 1893
	†Billingselloidea (Superfamily) Schuchert, 1893
	†Camaroidea (Order)
	Entire range
	†Nonnegorgonides (Genus) Lindström, 1978
	Lower limit
	†Anazygidina (Suborder) Copper, 1996
	†Anazygoidea (Superfamily) Davidson, 1883
	†Atrypida (Order) Rzhonsnitskaya, 1960
	†Camerelloidea (Superfamily) Hall & Clarke, 1894
	Craniida (Order) Waagen, 1885
	Cranioidea (Superfamily) Menke, 1828
	†Cryptostomata (Order) Vine, 1884 see (Order) †Cryptostomida Bassler, 1953
	†Cystoporata (Order) Astrova, 1964
	†Dalmanelloidea (Superfamily) Schuchert, 1913
	Discinoidea (Superfamily) Gray, 1840
	†Enteletoidea (Superfamily) Waagen, 1884
	†Fenestrata (Order) Elias & Condra, 1957 see (Order) †Fenestellida Astrova & Morozova, 1956
	†Lissatrypidina (Suborder) Copper, 1996
	†Orthotetida (Order) Waagen, 1884
	†Orthotetidina (Suborder) Waagen, 1884
	†Plectambonitoidea (Superfamily) Jones, 1928
	†Punctatrypoidea (Superfamily) Rzhonsnitskaya, 1960
	Rhynchonellida (Order) Kuhn, 1949
	†Skenidioidea (Superfamily) Kozlowski, 1929
	Stenolaemata (Class) Borg, 1926
	†Strophomenida (Order) Opik, 1934
	†Strophomenoidea (Superfamily) King, 1846
	†Trepostomata (Order) Ulrich, 1882
	†Trimerellida (Order)
	†Trimerelloidea (Superfamily) Davidson & King, 1872
	†Triplesiidina (Suborder) Moore, 1952
	†Triplesioidea (Superfamily) Schuchert, 1913
	Tubuliporata (Order)
	Within limits
	Acrotretida (Order) Kuhn, 1949
	†Acrotretoidea (Superfamily) Schuchert, 1893
	Anthozoa (Class) Ehrenberg, 1831
	Articulata (Class) Huxley, 1869
	†Billingsellida (Order) Schuchert, 1893
	Brachiopoda (Phylum) Duméril, 1806 - brachiopods
	Bryozoa (Phylum) Ehrenberg, 1831 - bryozoans
	†Chileata (Class) Williams  et al., 1996
	†Climacograptus (Genus) (Hall, 1865)
	Cnidaria (Phylum) Hatschek, 1888 - cnidarians
	†Conodonta (Phylum) Eichenberg, 1930 see (Subclass) †Conodonta Eichenberg, 1930
	†Conodontophorida (Class) Eichenberg, 1930 see (Order) †Conodontophorida Eichenberg, 1930
	†Conulariida (Order) Miller & Gurley, 1896
	†Conulata (Class) Moore & Harrington, 1956
	Craniata (Class) Williams, Carlson, Brunton, Holmer & Popov, 1996
	Craniidae (Family) Menke, 1828
	Craniiformea (Subphylum) Popov, Bassett, Holmer & Laurie, 1993
	†Craniopsida (Order) Gorjansky & Popov, 1985
	†Craniopsidae (Family) Williams, 1963
	†Craniopsoidea (Superfamily) Williams, 1963
	Ctenophora (Phylum) Eschscholtz, 1829 - comb jellies
	†Dalmanellidina (Suborder) Moore, 1952
	†Dendroidea (Order) Nicholson, 1872
	Discinidae (Family) Gray, 1840
	Ectoprocta (Phylum) Nitsche, 1869 see (Phylum) Bryozoa Ehrenberg, 1831 - ectoprocts
	†Glyptograptus (Genus) Lapworth, 1873
	†Glyptorthis (Genus) Foerste, 1912
	†Graptolithina (Class) Bronn, 1849
	†Graptoloidea (Order) Lapworth, 1875
	Hemichordata (Phylum) Bateson, 1885 - hemichordates
	Hydroida (Order) Johnston, 1836 see (Order) Anthoathecatae - hydroids
	Hydrozoa (Class) Owen, 1843
	†Hyolitha (Phylum) (Marek, 1963) see (Class) †Hyolitha Marek, 1963
	†Hyolithes (Genus) Eichwald, 1840
	Inarticulata (Class) (Huxley, 1869)
	Larvacea (Class) Herdman, 1891 see (Class) Appendicularia Lahille, 1890
	Lingulata (Class) Gorjansky & Popov, 1985
	Lingulida (Order) Waagen, 1885
	Linguliformea (Subphylum) Williams et al., 1996
	Linguloidea (Superfamily) Menke, 1828
	†Lobopodia (Phylum) Snodgrass, 1938 - lobopodians
	Monoplacophora (Class) Odhner, 1940 - monoplacophorans
	†Obolidae (Family) King, 1846
	Octocorallia (Subclass) Haeckel, 1866 see (Subclass) Alcyonaria - octocorals
	†Orthida (Order) Schuchert & Cooper, 1932
	†Orthidina (Suborder) Schuchert & Cooper, 1932
	†Orthoidea (Superfamily) Woodward, 1852
	†Orthotheca (Genus) Novák, 1887
	†Orthothecida (Order) Marek, 1966
	†Paraconodontida (Class) Müller, 1962 see (Order) †Paraconodontida Müller, 1962
	†Paterinata (Class) Williams et al, 1996
	†Paterinida (Order) Rowell, 1965
	†Paterinoidea (Superfamily) Schuchert, 1893
	†Pentamerida (Order) Schuchert & Cooper, 1931
	†Platystrophia (Genus) King, 1850
	†Plectorthoidea (Superfamily) Schuchert & Le Vene, 1929
	Polyplacophora (Class) Blainville, 1816 - chitons
	†Porambonitoidea (Superfamily) Davidson, 1853
	†Procoelomata (Phylum) Bergström, 1989
	†Protorthida (Order) Schuchert & Cooper, 1931
	Pterobranchia (Class) Lankester, 1877 - pterobranchs
	Pterobranchia (Phylum) Lankester, 1877 see (Class) Pterobranchia Lankester, 1877
	Rhynchonellata (Class) Williams et al., 1996
	Rhynchonelliformea (Subphylum) Williams et al., 1996
	†Rostricellula (Genus) Ulrich & Cooper, 1942
	†Rostroconchia ([unranked]) Cox, 1960 see (Class) †Rostroconchia Pojeta et al., 1972
	Scyphomedusae (Group) see (Subclass) Scyphomedusae Lankaster, 1877
	Scyphozoa (Class) Goette, 1887 - jellyfish
	†Siphonotretida (Order) Gorjansky, 1960
	†Siphonotretidae (Family) Kutorga, 1848
	†Siphonotretoidea (Superfamily) Kutorga, 1848
	†Strophomenata (Class) Williams et al, 1996
	†Strophomenidina (Suborder) Opik, 1934
	†Syntrophiidina (Suborder) Ulrich & Cooper, 1936
	†Tabulata (Order) (Milne-Edwards & Haime, 1850)
	Trachylinida (Order) see (Order) Trachylina Haeckel, 1879
	†Trimerellacea (Superfamily) Davidson & King, 1872 see (Superfamily) †Trimerelloidea Davidson & King, 1872
	†Tuboidea (Order) Kozlowski, 1938
	Zoantharia (Subclass) de Blainville, 1830
	Animals (2)
	Within limits
	Animalia (Kingdom) Linnaeus, 1758 - animals
	Chordata (Phylum) Bateson, 1885 - chordates
	Fungi (1)
	Within limits
	Fungi (Kingdom) R.T.Moore (1980) - fungi
	Algae (10)
	Within limits
	†Baltisphaeridium (Genus) Eisenack, 1958 ex Eisenack, 1959
	†Cymatiosphaera multisepta Deunff (1955)
	Dasycladaceae (Family) Kützing (1843)
	Dasycladales (Order) Pascher (1931)
	†Dorsennidium (Genus) Wicander, 1974
	†Dorsennidium europaeum (Stockmans & Willière, 1960) Sarjeant & Stancliffe (1994)
	†Dorsennidium europaeum subsp. europaeum (Stockmans & Willière, 1960) Sarjeant & Stancliffe (1994)
	†Dorsennidium europaeum subsp. wenlockianum (Downie, 1959 ex Wall & Downie, 1963) Sarjeant & Stancliffe (1994)
	†Leiofusa (Genus) Eisenack, 1938
	Prasinophyceae (Class) T. Christensen, 1962 ex Ø. Moestrup & J. Throndsen (1988) see ([unranked]) prasinophytes - prasinophytes
	Protozoa (7)
	Within limits
	†Acritarcha (Group) Evitt, 1963 - acritarchs
	allogromids (Suborder) see (Order) Allogromiida Loeblich & Tappan, 1961
	Foraminifera (Class) d'Orbigny, 1826 see (Phylum) Foraminifera d'Orbigny, 1826
	Foraminifera (Order) d'Orbigny, 1826 see (Class) Foraminifera d'Orbigny, 1826
	Foraminiferida (Order) d'Orbigny, 1826 see (Class) Foraminifera d'Orbigny, 1826 - foraminiferans
	†Fusulinids (Suborder) see (Order) †Fusulinida Fursenko, 1958
	textularids (Suborder) see (Order) Textulariida Delage & Hérouard, 1896
	Protists (33)
	Entire range
	†Eremochitina (Genus) Taugourdeau & de Jekhowsky, 1960
	†Ollachitina (Genus) Poumot, 1968
	Lower limit
	†Belonechitina (Genus) Jansonius, 1964
	†Belonechitininae (Subfamily) Paris, 1981
	†Chitinozoa Eisenack, 1931 - chitinozoans
	†Conochitinidae (Family) Eisenack, 1931
	†Cyathochitininae (Subfamily) Paris, 1981
	†Desmochitina (Genus) Eisenack, 1931
	†Desmochitinidae (Family) Eisenack, 1931
	†Desmochitininae (Subfamily) Eisenack, 1931
	†Eremochitininae (Subfamily) Paris, 1981
	†Lagenochitina (Genus) Eisenack, 1931
	†Lagenochitinidae (Family) Eisenack, 1931
	†Lagenochitininae (Subfamily) Eisenack, 1931
	†Operculatifera (Order) Eisenack, 1931
	†Pellichitina (Genus) Achab, Asselin & Soufiane, 1993
	†Pellichitininae (Subfamily) Achab, Asselin & Soufiane, 1993
	†Prosomatifera (Order) Eisenack, 1972
	†Sagenachitina (Genus) Jenkins, 1970
	†Siphonochitina (Genus) Jenkins, 1967
	†Velatachitina (Genus) Poumot, 1968
	†Velatachitininae (Subfamily) Achab, Asselin & Soufiane, 1993
	Within limits
	†Bursachitina (Genus) Taugourdeau, 1966
	†Calpichitina (Genus) Wilson & Hedlund, 1964
	†Conochitina (Genus) Eisenack, 1931
	†Conochitininae (Subfamily) Eisenack, 1931
	†Cyathochitina (Genus) Eisenack,1955
	†Euconochitina (Genus) Taugourdeau, 1966
	Paleodictyon (Genus) Menghini, 1850
	Polycystinea (Class) Ehrenberg, 1838 see (Superclass) Polycystinia Ehrenberg, 1838 - polycystines
	Spirotrichea (Class) Bütschli, 1889
	†Tanuchitina (Genus) Jansonius, 1964
	†Tanuchitininae (Subfamily) Paris, 1981
	Eukaryotes (4)
	Within limits
	Dinomastigota (Phylum) Margulis, 1996 see (Phylum) Dinoflagellata Engl. (1903)
	Eukarya (Superkingdom) Chatton, 1925 see (Domain) Eukaryota Chatton, 1925
	Eukaryota (Domain) Chatton, 1925 - eukaryotes
	Protoctista (Kingdom) Hogg, 1860
	Prokaryotes (4)
	Within limits
	Bacteria (Kingdom) (Cohn 1870) Cavalier-Smith 1983 see (Kingdom) Bacteria Cavalier-Smith 2002 - bacteria
	Bacteria (Kingdom) Cavalier-Smith 2002 see (Domain) Bacteria Woese et al. 1990 - bacteria
	Cyanobacteria (Phylum) (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
	Monera (Kingdom) Haeckel 1866 see (Domain) Bacteria Woese et al. 1990
	Organisms (1)
	Within limits
	organisms ([unranked]) see (Clade) Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
	Geological regions (52)
	Within limits
	Aldan Shield (Geologic province)
	Anabar Shield ([unranked])
	Arabian-Nubian Shield ([unranked])
	Baikal Fold Belt ([unranked])
	†Baltic Plate ([unranked]) see (Tectonic plate) Eurasian Plate
	Baltic Shield ([unranked])
	Cameroon N'tem Complex ([unranked])
	Central Africa Craton ([unranked])
	Chaillu Craton ([unranked])
	Committee Bay Block ([unranked])
	Congo Craton ([unranked])
	Ethiopian Block ([unranked])
	†Gondwana ([unranked]) E. Suess, 1861
	Greenland Shield (Geologic province)
	Guapore Craton ([unranked])
	Guiana Shield ([unranked])
	Indian Shield (Geologic province)
	Kaapvaal Craton ([unranked])
	Kaminak Group ([unranked])
	Kasaï Craton ([unranked])
	Labrador Shield ([unranked])
	†Laurentia ([unranked])
	Litchfield Complex ([unranked])
	Luis Alves Massif ([unranked])
	Madagascar Craton ([unranked])
	Man Shield ([unranked])
	Nanambu Complex ([unranked])
	Pilbara Block (Geologic province)
	Reguibat Shield ([unranked])
	Rio de la Plata Craton ([unranked])
	Rio de la Plata Massif ([unranked])
	Rul Jungle Complex ([unranked])
	São Francisco Craton ([unranked])
	Sayan Fold Belt ([unranked])
	Scottish Shield ([unranked])
	Sebakwe Proto-Craton ([unranked])
	Sino-Korean Craton ([unranked]) see ([unranked]) North China Craton
	Slave Craton ([unranked])
	Slave Province ([unranked])
	Superior Craton ([unranked])
	Superior Province ([unranked])
	Tanzanian Craton ([unranked])
	Tarim Craton ([unranked])
	Tuareg Shield ([unranked])
	Ukrainian Shield (Geologic province)
	West African Craton ([unranked])
	Wyoming Province ([unranked])
	Yangtze Craton ([unranked])
	Yienisei Fold Belt ([unranked])
	Yilgarn Block (Geologic province)
	Zambian Block ([unranked])
	Zimbabwe Craton ([unranked])
	Geological entities (4)
	Within limits
	†Iapetus Ocean ([unranked])
	†Khanty Ocean ([unranked])
	Napier Complex ([unranked]) (Antarctica)
	†Proto-Tethys Ocean ([unranked])
Links
	http://www.palaeos.com/Paleozoic/Ordovician/EarlyOrd.html