Period: 488 million to 472 million years ago.
†Cordylodus (Genus)
†Drepanoistodus (Genus) Lindstrom, 1971
†Fryxellodontus (Genus) Miller, 1969
†Microzarkodina (Genus) Lindstrom, 1971
†Scandodus (Genus) Lindström, 1954
Lower limit:
†Scolopodus (Genus) Pander, 1856
Within limits:
†Distacodontina (Order)
Within limits:
Vertebrata (Subphylum) Cuvier, 1812 - vertebrates
Within limits:
Bairdia (Genus) McCoy, 1844
Branchiopoda (Class) Latreille, 1817 - branchiopods
Cephalocarida (Class) H.L. Sanders, 1955 - cephalocarids
†Eurychilinidae (Family)
†Leperditicopida (Order) Scott, 1961
Malacostraca (Class) Latreille, 1802
Myodocopida (Order) Sars, 1866
Ostracoda (Class) Latreille, 1802 - ostracods
Phyllocarida (Subclass) Packard, 1879 - leptostracans
Platycopida (Order) Sars, 1866
Podocopida (Order) (Sars, 1866) G.W. Müller, 1894
Entire range:
†Asaphus (Genus)
†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) Latreille, 1829 - arthropods
†Chasmataspidida (Order) Caster & Brooks, 1956
Chelicerata (Superclass)
†Naraoia (Genus) Walcott, 1912
†Naraoiidae (Family) Walcott, 1912
†Nektaspida (Order) Raymond, 1920 - nektaspids
Xiphosura (Class) Latreille, 1802 - horseshoe crabs
Xiphosurida (Order) Latreille, 1802
Entire range:
†Apoptopegma (Genus) Pojeta, Gilbert-Tomlinson & Shergold, 1977
†Ceratopea (Genus) Ulrich, 1911
†Chelodes (Genus)
†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
†Technophorus coreanicus (Kobayashi, 1934) Pojeta & Runnegar, 1976:58, pl.11
Lower limit:
†Bransonia (Genus) Pojeta & Runnegar, 1976
†Eopteria (Genus) Billings, 1865
†Technophorus (Genus) Miller, 1889
†Tolmachovia (Genus)
Within limits:
†Actinoceratoidea (Subclass)
Bivalvia (Class) C. Linnaeus, 1758 - bivalves
Cephalopoda (Class) Cuvier, 1797 - cephalopods
†Conocardioida (Order) Neumayr, 1891
†Cyclonema (Genus) Hall, 1851[1852]
†Cyrtonellida (Order)
†Endoceratoidea (Subclass)
Gastropoda (Class) Cuvier, 1795 - snails and slugs
†Hyolithida (Order) Matthew, 1899
†Mimospira (Genus) Perner, 1925
Nautiloidea (Subclass) Agassiz, 1847
Nautilus (Genus) C. Linnaeus, 1758
†Onychochilina (Suborder)
†Pinnocaris (Genus)
†Ribeiria (Genus)
†Ribeirioida (Order) Kobayashi, 1933
†Rostroconchia (Class) Pojeta et al., 1972
Entire range:
†Kadriorgaspis (Genus) Hints, 2006
†Kadriorgaspis kaisae Hints, 2006
†Xanioprion viivei Hints, 2006
Within limits:
Polychaeta (Class) Grube, 1850 - polychaetes
Upper limit:
†Acrotheloidea (Superfamily)
†Billingsellidina (Suborder)
†Billingselloidea (Superfamily)
†Camaroidea (Order)
Entire range:
†Mesocystis (Genus) Bather, 1898
†Nonnegorgonides (Genus) Lindström, 1978
†Phyllocystis (Genus) Thoral, 1935
Lower limit:
†Anazygidina (Suborder)
†Anazygoidea (Superfamily)
Asteroidea (Class) - sea stars
†Atrypida (Order)
†Camerates (Subclass)
†Camerelloidea (Superfamily)
Craniida (Order) Waagen, 1885
Cranioidea (Superfamily) Menke, 1828
†Cryptostomata (Order)
†Cystoporata (Order)
†Dalmanelloidea (Superfamily)
†Diploporita (Class)
Discinoidea (Superfamily)
†Enteletoidea (Superfamily)
†Fenestrata (Order)
†Inadunates (Subclass)
†Lissatrypidina (Suborder)
†Ophiocistioidea (Class)
Ophiuroidea (Class) - brittle stars and basket stars
†Orthotetida (Order)
†Orthotetidina (Suborder)
†Parablastoidea (Class)
†Paracrinoidea (Class)
Platyasterida (Order)
†Plectambonitoidea (Superfamily)
†Punctatrypoidea (Superfamily)
†Rhombifera (Class)
Rhynchonellida (Order)
†Skenidioidea (Superfamily) Kozlowski, 1929
Stenolaemata (Class)
†Strophomenida (Order) Opik, 1934
†Strophomenoidea (Superfamily)
†Trepostomata (Order) Ulrich, 1882
†Trimerellida (Order)
†Trimerelloidea (Superfamily)
†Triplesiidina (Suborder)
†Triplesioidea (Superfamily)
Tubuliporata (Order)
Within limits:
Acrotretida (Order) Kuhn, 1949
†Acrotretoidea (Superfamily)
Amphidiscophora (Subclass) F.E. von Schulze, 1887
Amphidiscosida (Order) Schrammen
Annelida (Phylum) Lamarck, 1809 - segmented worms
†Anthaspidellidae (Family) Miller, 1889
Anthozoa (Class) Ehrenberg, 1831
†Astraeospongiidae (Family) de Laubenfels, 1955
†Astylospongiidae (Family) Rauff, 1893
†Billingsellida (Order)
Brachiopoda (Phylum) Duméril, 1806 - brachiopods
†Brachiospongiidae (Family) Beecher, 1889
Calcarea (Class) Bowerbank, 1864 - calcareous sponges
Ceractinomorpha (Subclass) Lévi, 1973
†Chiastoclonellidae (Family) de Laubenfels, 1955
†Chileata (Class)
†Choiidae (Family) de Laubenfels, 1955
†Climacograptus (Genus)
Clionaidae (Family) d'Orbigny, 1851
†Cnemidiastridae (Family) Schrammen, 1936
Cnidaria (Phylum) Hatschek, 1888 - cnidarians
†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
Crinoidea (Class) - sea lilies and feather stars
Ctenophora (Phylum) Eschscholtz, 1829 - comb jellies
†Dalmanellidina (Suborder)
Demospongiae (Class) Sollas, 1875 - demosponges
†Dendroidea (Order)
†Dictyospongiidae (Family) Hall, 1882
†Dictyospongioidea (Suborder) Hall & Clarke, 1899
†Dierespongioidea (Suborder) Rigby, 1976
Discinidae (Family)
Echinodermata (Phylum) Klein, 1734 ex De Brugière, 1789 - echinoderms
Ectoprocta (Phylum) Nitsche, 1870 - ectoprocts
†Edrioasteroidea (Class)
†Eocrinoidea (Class)
†Eurypterida (Order) Burmeister, 1843 - eurypterids
†Glyptograptus (Genus) Lapworth, 1873
†Glyptorthis (Genus) Foerste, 1912
†Graptolithina (Class)
†Graptoloidea (Order)
Hadromerida (Order) Topsent, 1898
Hemichordata (Phylum) (Bateson, 1885) auct. - hemichordates
†Heteractinida (Order) Hinde, 1888
Hexactinellida (Class) O. Schmidt, 1870 - hexactinellids
Hexasterophora (Subclass) F.E. von Schulze, 1887
†Hintzespongiidae (Family) Finks, 1983
†Hintzespongioidea (Suborder) Finks, 1983
Holothuroidea (Class) - sea cucumbers
†Homalozoa (Subphylum) Whitehouse, 1941
†Homoiostelea (Class)
Hydrozoa (Class) Owen, 1843
†Hyolithes (Genus) Eichwald, 1840
Lingulata (Class)
Lingulida (Order) Waagen, 1885
Linguliformea (Subphylum)
Linguloidea (Superfamily) Menke, 1828
Lithistida (Order) Schmidt, 1870 - lithistids
†Lobopodia (Phylum) Snodgrass, 1938 - lobopodians
Lyssacinosida (Order) (Zittel, 1877) W.D. Hartman, in S.P. Parker, 1982
Mollusca (Phylum) Linnaeus, 1758 - molluscs
Monoplacophora (Class) Odhner, 1940 - monoplacophorans
†Obolidae (Family)
†Orchocladina (Suborder) Rauff, 1893
†Orthida (Order) Schuchert & Cooper, 1932
†Orthidina (Suborder)
†Orthoidea (Superfamily)
†Orthotheca (Genus)
†Orthothecida (Order) Marek, 1966
†Paterinata (Class)
†Paterinida (Order)
†Paterinoidea (Superfamily)
†Pentamerida (Order)
†Piraniidae (Family) de Laubenfels, 1955
†Platystrophia (Genus) King, 1850
†Plectorthoidea (Superfamily)
Polyplacophora (Class) Blainville, 1816 - chitons
†Porambonitoidea (Superfamily)
Porifera (Phylum) Grant, in Todd, 1836 - sponges
†Procoelomata (Phylum) Bergström, 1989
†Protorthida (Order)
†Protospongiidae (Family) Hinde, 1887
†Protospongioidea (Suborder) Finks, 1960
Pterobranchia (Class) - pterobranchs
Pycnogonida (Class) Latreille, 1810 - pycnogonids
†Reticulosa (Order) Reid, 1958
†Rhizomorina (Suborder) Zittel, 1878
Rhynchonellata (Class)
Rhynchonelliformea (Subphylum)
†Rostricellula (Genus) Ulrich & Cooper, 1942
Scyphozoa (Class) - jellyfish
†Siphonotretida (Order)
†Siphonotretidae (Family)
†Siphonotretoidea (Superfamily)
†Sphaerocladina (Suborder) Schrammen, 1910
†Sphinctozoa (Order)
†Stromatopora (Genus) Goldfuss, 1826
†Strophomenata (Class)
†Stylophora (Class) - stylophorans
†Syntrophiidina (Suborder)
†Tabulata (Order)
Tetracladina (Suborder) Zittel, 1878
Tetractinomorpha (Subclass) Lévi
†Tuboidea (Order)
Verongida (Order) Bergquist
Zoantharia (Subclass)
Within limits:
Chordata (Phylum) Bateson, 1885 - chordates
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
Entire range:
†Eremochitina (Genus) Taugourdeau & de Jekhowsky, 1960
†Ollachitina (Genus) Poumot, 1968
Lower limit:
†Belonechitina (Genus) Jansonius, 1964
†Belonechitininae (Subfamily) Paris, 1981
†Chitinozoa - chitinozoans
†Conochitinidae (Family) Eisenack, 1931
†Cyathochitininae (Subfamily) Paris, 1981
†Desmochitina (Genus) Eisenack, 1931
†Desmochitinidae (Family) Eisenack, 1931
†Desmochitininae (Subfamily) (Eisenack, 1931) Paris, 1981
†Eremochitininae (Subfamily) Paris, 1981
†Lagenochitina (Genus) Eisenack, 1931
†Lagenochitinidae (Family) Eisenack, 1931
†Lagenochitininae (Subfamily) (Eisenack, 1931) Paris, 1981
†Operculatifera (Order) Eisenack, 1931
†Pellichitina (Genus) Achab et al., 1993
†Pellichitininae (Subfamily) Achab et al., 1993
†Prosomatifera (Order) Eisenack, 1972
†Sagenachitina (Genus) Jenkins, 1970
†Siphonochitina (Genus) Jenkins, 1967
†Velatachitina (Genus) Poumot, 1968
†Velatachitininae (Subfamily) Achab et al., 1993
Within limits:
†Acritarcha Evitt, 1963 - acritarchs
†Bursachitina (Genus) Taugourdeau, 1966
†Calpichitina (Genus) Wilson & Hedlund, 1964
†Conochitina (Genus) Eisenack, 1931
†Conochitininae (Subfamily) (Eisenack, 1931) Paris, 1981
†Cyathochitina (Genus) Eisenack,1955
†Euconochitina (Genus) Taugourdeau, 1966
Foraminifera (Class) Lee, 1990
Paleodictyon (Genus) Menghini, 1850
Polycystinea (Class) - polycystines
Spirotrichea (Class) Bütschli, 1889
†Tanuchitina (Genus) Jansonius, 1964
†Tanuchitininae (Subfamily) Paris, 1981
Within limits:
Animalia (Kingdom) Linnaeus, 1758 - animals
Eukaryota (Domain) Chatton, 1925 - eukaryotes
Fungi (Kingdom) T.L. Jahn & F.F. Jahn, 1949 ex R.T. Moore, 1980 - fungi
Within limits:
Cyanobacteria (Phylum) Stanier, 1974 ex Cavalier-Smith, 2002 - cyanobacteria
Within limits:
Biota
Within limits:
Aldan Shield
Anabar Shield
Arabian-Nubian Shield
Baikal Fold Belt
Baltic Shield
Cameroon N'tem Complex
Central Africa Craton
Chaillu Craton
Committee Bay Block
Congo Craton
Ethiopian Block
†Gondwana E. Suess, 1861
Greenland Shield
Guapore Craton
Guiana Shield
†Iapetus Ocean
Indian Shield
Kaapvaal Craton
Kaminak Group
Kasaï Craton
†Khanty Ocean
Labrador Shield
†Laurentia
Litchfield Complex
Luis Alves Massif
Madagascar Craton
Man Shield
Nanambu Complex
Napier Complex
Pilbara Block
†Proto-Tethys Ocean
Reguibat Shield
Rio de la Plata Craton
Rio de la Plata Massif
Rul Jungle Complex
São Francisco Craton
Sayan Fold Belt
Scottish Shield
Sebakwe Proto-Craton
Slave Craton
Slave Province
Superior Craton
Superior Province
Tanzanian Craton
Tarim Craton
Tuareg Shield
Ukrainian Shield
West African Craton
Wyoming Province
Yangtze Craton
Yienisei Fold Belt
Yilgarn Block
Zambian Block
Zimbabwe Craton
http://www.palaeos.com/Paleozoic/Ordovician/EarlyOrd.html