Period: 472 million to 461 million years ago.
†Scolopodus (Genus) Pander, 1856
Entire range:
†Icriodella (Genus) Rhodes, 1953
†Phragmodus (Genus)
†Rhipidognathus (Genus) Branson, Mehl & Branson, 1951
Lower limit:
†Hibbardellina (Order)
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
Upper limit:
†Illaenus (Genus) Dalman, 1827
Entire range:
†Apianurus (Genus) Whittington, 1956
†Bathyurus (Genus) Billings, 1859
†Ceraurinella (Genus) Cooper, 1953
†chasmataspidids
†Cryptolithus (Genus) Green, 1832
†Hoplolichas (Genus) Dames, 1877
†Hoplolichas furcifer (Schmidt, 1885)
†Remopleurides (Genus) Portlock, 1843
†Sphaeragnostus similaris (Barrande, 1872)
Lower limit:
†Cheirurina (Suborder)
†Cheiruroidea (Superfamily)
†Lichidae (Family)
†Phacopida (Order) Salter, 1864
Progoneata
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
Upper limit:
†Eopteria (Genus) Billings, 1865
†Ribeiria (Genus)
†Tolmachovia (Genus)
Entire range:
†Alococoncha (Genus) Pojeta & Gilbert-Tomlinson, 1977
†Babinka (Genus) Perner, 1881
†Babinka prima
†Cardiolaria (Genus) Munier-Chalmas, 1876
†Ctenodonta (Genus) Salter, 1852
†Cyrtodonta (Genus) Billings, 1858
†Deceptrix (Genus) Fuchs, 1919
†Eopteria trilobata Kobayashi, 1934
†Johnmartinia (Genus) Pojeta & Gilbert-Tomlinson, 1977
†Modiolodon (Genus)
†Myocaris (Genus)
†Palaeopteria (Genus) Whiteaves, 1897
†Redonia (Genus) Rouault, 1851
†Rhytiodentalium (Genus) (Pojeta & Runnegar, 1979)
†Tancrediopsis (Genus) Beushausen, 1895
†Vanuxemia (Genus) Billings, 1858
Lower limit:
†Cuneamya (Genus) Hall & Whitfield, 1875
†Hippocardia (Genus) Brown, 1843
†Ischyrinia (Genus) Billings, 1866
†Lyrodesma (Genus) Conrad, 1841
Scaphopoda (Class) Bronn, 1862 - tusk shells
Within limits:
†Actinoceratoidea (Subclass)
Bivalvia (Class) C. Linnaeus, 1758 - bivalves
†Bransonia (Genus) Pojeta & Runnegar, 1976
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)
†Ribeirioida (Order) Kobayashi, 1933
†Rostroconchia (Class) Pojeta et al., 1972
†Technophorus (Genus) Miller, 1889
Entire range:
†Trentonia (Genus) Pickerill & Forbes, 1978
Within limits:
Polychaeta (Class) Grube, 1850 - polychaetes
Upper limit:
†Parablastoidea (Class)
Entire range:
†Amygdalocystites (Genus) Billings, 1854
†Brachiospongia digitata (Owen)
†Carabocrinus (Genus) Billings, 1857
†Cheirocystis (Genus) Paul, 1972
†Conchopeltis (Genus) Walcott, 1879
†Conularia (Genus) Miller, in Sowerby, 1820
†Corynotrypa (Genus) Bassler, 1911
†Cryptogoleus (Genus) Bell, 1976
†Edrioblastoidea (Class)
†Edriophus (Genus) Bell, 1976
†Eumorphocystis (Genus) Branson & Peck, 1940
†Foerstediscus (Genus) Bassler, 1935
†Glyptocystella (Genus) Paul, 1972
†Glyptocystites (Genus) Billings, 1854
†Hybocrinus (Genus) Billings, 1857
†Mitrocystella (Genus) Jaekel, 1901
†Mitrocystites (Genus) Barrande, 1887
†Platycystites (Genus) Miller, 1889
†Pleurocystites (Genus) Billings, 1854
†Pseudostylodictyon (Genus) Ozaki, 1938
†Receptaculites oweni Hall
†Streptelasma corniculum Hall
†Tetradium fibratum Safford
Lower limit:
†Ancistrorhynchoidea (Superfamily)
†Blastoidea (Class)
†Crustoidea (Order)
†Cyclocystoidea (Class)
†Flexibles (Subclass)
†Haplistiidae (Family) de Laubenfels, 1955
†Heliolitida (Order)
†Lissatrypoidea (Superfamily)
†Rugosa (Order)
Within limits:
Acrotretida (Order) Kuhn, 1949
†Acrotretoidea (Superfamily)
Amphidiscophora (Subclass) F.E. von Schulze, 1887
Amphidiscosida (Order) Schrammen
†Anazygidina (Suborder)
†Anazygoidea (Superfamily)
Annelida (Phylum) Lamarck, 1809 - segmented worms
†Anthaspidellidae (Family) Miller, 1889
Anthozoa (Class) Ehrenberg, 1831
Asteroidea (Class) - sea stars
†Astraeospongiidae (Family) de Laubenfels, 1955
†Astylospongiidae (Family) Rauff, 1893
†Atrypida (Order)
†Billingsellida (Order)
Brachiopoda (Phylum) Duméril, 1806 - brachiopods
†Brachiospongiidae (Family) Beecher, 1889
Calcarea (Class) Bowerbank, 1864 - calcareous sponges
†Camerates (Subclass)
†Camerelloidea (Superfamily)
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
Craniida (Order) Waagen, 1885
Craniidae (Family) Menke, 1828
Craniiformea (Subphylum) Popov, Bassett, Holmer & Laurie, 1993
Cranioidea (Superfamily) Menke, 1828
†Craniopsida (Order) Gorjansky & Popov, 1985
†Craniopsidae (Family) Williams, 1963
†Craniopsoidea (Superfamily) Williams, 1963
Crinoidea (Class) - sea lilies and feather stars
†Cryptostomata (Order)
Ctenophora (Phylum) Eschscholtz, 1829 - comb jellies
†Cystoporata (Order)
†Dalmanellidina (Suborder)
†Dalmanelloidea (Superfamily)
Demospongiae (Class) Sollas, 1875 - demosponges
†Dendroidea (Order)
†Dictyospongiidae (Family) Hall, 1882
†Dictyospongioidea (Suborder) Hall & Clarke, 1899
†Dierespongioidea (Suborder) Rigby, 1976
†Diploporita (Class)
Discinidae (Family)
Discinoidea (Superfamily)
Echinodermata (Phylum) Klein, 1734 ex De Brugière, 1789 - echinoderms
Ectoprocta (Phylum) Nitsche, 1870 - ectoprocts
†Edrioasteroidea (Class)
†Enteletoidea (Superfamily)
†Eocrinoidea (Class)
†Eurypterida (Order) Burmeister, 1843 - eurypterids
†Fenestrata (Order)
†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
†Inadunates (Subclass)
Lingulata (Class)
Lingulida (Order) Waagen, 1885
Linguliformea (Subphylum)
Linguloidea (Superfamily) Menke, 1828
†Lissatrypidina (Suborder)
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)
†Ophiocistioidea (Class)
Ophiuroidea (Class) - brittle stars and basket stars
†Orchocladina (Suborder) Rauff, 1893
†Orthida (Order) Schuchert & Cooper, 1932
†Orthidina (Suborder)
†Orthoidea (Superfamily)
†Orthotetida (Order)
†Orthotetidina (Suborder)
†Orthotheca (Genus)
†Orthothecida (Order) Marek, 1966
†Paracrinoidea (Class)
†Paterinata (Class)
†Paterinida (Order)
†Paterinoidea (Superfamily)
†Pentamerida (Order)
†Piraniidae (Family) de Laubenfels, 1955
Platyasterida (Order)
†Platystrophia (Genus) King, 1850
†Plectambonitoidea (Superfamily)
†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
†Punctatrypoidea (Superfamily)
Pycnogonida (Class) Latreille, 1810 - pycnogonids
†Reticulosa (Order) Reid, 1958
†Rhizomorina (Suborder) Zittel, 1878
†Rhombifera (Class)
Rhynchonellata (Class)
Rhynchonellida (Order)
Rhynchonelliformea (Subphylum)
†Rostricellula (Genus) Ulrich & Cooper, 1942
Scyphozoa (Class) - jellyfish
†Siphonotretida (Order)
†Siphonotretidae (Family)
†Siphonotretoidea (Superfamily)
†Skenidioidea (Superfamily) Kozlowski, 1929
†Sphaerocladina (Suborder) Schrammen, 1910
†Sphinctozoa (Order)
Stenolaemata (Class)
†Stromatopora (Genus) Goldfuss, 1826
†Strophomenata (Class)
†Strophomenida (Order) Opik, 1934
†Strophomenoidea (Superfamily)
†Stylophora (Class) - stylophorans
†Syntrophiidina (Suborder)
†Tabulata (Order)
Tetracladina (Suborder) Zittel, 1878
Tetractinomorpha (Subclass) Lévi
†Trepostomata (Order) Ulrich, 1882
†Trimerellida (Order)
†Trimerelloidea (Superfamily)
†Triplesiidina (Suborder)
†Triplesioidea (Superfamily)
†Tuboidea (Order)
Tubuliporata (Order)
Verongida (Order) Bergquist
Zoantharia (Subclass)
Lower limit:
†Stromatoporoidea (Class) Nicholson & Murie
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
Upper limit:
†Eremochitininae (Subfamily) Paris, 1981
†Pellichitina (Genus) Achab et al., 1993
†Pellichitininae (Subfamily) Achab et al., 1993
†Sagenachitina (Genus) Jenkins, 1970
†Siphonochitina (Genus) Jenkins, 1967
†Velatachitina (Genus) Poumot, 1968
†Velatachitininae (Subfamily) Achab et al., 1993
Entire range:
†Baltochitina (Genus) F. Paris & Y. Grahn, in F. Paris et al., 1999
Lower limit:
†Acanthochitina (Genus) Eisenack, 1931
†Armoricochitina (Genus) Paris, 1981
†Eisenackitina (Genus) Jansonius, 1964
†Eisenackitininae (Subfamily) Paris, 1981
†Hercochitina (Genus) Jansonius, 1964
†Linochitina (Genus) Eisenack, 1968
†Margachitininae (Subfamily) Paris, 1981
†Ordochitina (Genus) Achab et al., 1993
†Pistillachitina (Genus) Taugourdeau, 1966
†Pogonochitina (Genus) Taugourdeau, 1961
†Pogonochitininae (Subfamily) F. Paris et al., 1999
†Pterochitina (Genus) Eisenack, 1955
†Pterochitininae (Subfamily) Paris, 1981
†Saharochitina (Genus) F. Paris & Y. Grahn, in F. Paris et al., 1999
Within limits:
†Acritarcha Evitt, 1963 - acritarchs
†Belonechitina (Genus) Jansonius, 1964
†Belonechitininae (Subfamily) Paris, 1981
†Bursachitina (Genus) Taugourdeau, 1966
†Calpichitina (Genus) Wilson & Hedlund, 1964
†Chitinozoa - chitinozoans
†Conochitina (Genus) Eisenack, 1931
†Conochitinidae (Family) Eisenack, 1931
†Conochitininae (Subfamily) (Eisenack, 1931) Paris, 1981
†Cyathochitina (Genus) Eisenack,1955
†Cyathochitininae (Subfamily) Paris, 1981
†Desmochitina (Genus) Eisenack, 1931
†Desmochitinidae (Family) Eisenack, 1931
†Desmochitininae (Subfamily) (Eisenack, 1931) Paris, 1981
†Euconochitina (Genus) Taugourdeau, 1966
Foraminifera (Class) Lee, 1990
†Lagenochitina (Genus) Eisenack, 1931
†Lagenochitinidae (Family) Eisenack, 1931
†Lagenochitininae (Subfamily) (Eisenack, 1931) Paris, 1981
†Operculatifera (Order) Eisenack, 1931
Paleodictyon (Genus) Menghini, 1850
Polycystinea (Class) - polycystines
†Prosomatifera (Order) Eisenack, 1972
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/MidOrd.html