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Published: February 23, 2011

Silurian Reef Fossils

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  • Brachiopoda - Rhynchonellata - Pentamerida   Kirkidium laqueatum     Previously (Conchidium laqueatum)Specimen UC 12329 Paleozoic - Silurian -Niagaran (~420 million years ago) Delphi, Indiana

    (c) Unspecified

  • Brachiopoda - Rhynchonellata - Pentamerida   Pentamerus oblongusSpecimen UC 13212 Paleozoic - Silurian - Niagaran(~420 million years ago) Northern Indiana?

    (c) Unspecified

  • Arthropoda - Trilobita - Phacopida   Calymene celebraSpecimen PE 39218 Racine Formation Paleozoic - Silurian Milwaukee, Wisconsin

    (c) Unspecified

  • Arthropoda - Trilobita - Phacopida   Calymene celebraSpecimen PE 39218 Racine Formation Paleozoic - Silurian Milwaukee, Wisconsin

    (c) Unspecified

  • Arthropoda - Trilobita - Phacopida   Phacops handwerkiSpecimen PE 10xx9 Racine Formation Paleozoic - Silurian -Niagaran Lemont, Illinois

    (c) Unspecified

  • Echinodermata - Rhombifera -   Caryocrinites indianensisSpecimen UC 6028   Paleozoic - Silurian - Niagaran Jefferson County, Indiana

    (c) Unspecified

  • Echinodermata - Diploporita -   Holocystites alternatusSpecimen UC 18061 Osgood Formation ?? Paleozoic - Silurian - Niagaran Jefferson County, Indiana

    (c) Unspecified

  • Mollusca - Gastropoda - Euomphalina   Poleumita? discoideaSpecimen UC 2879 (holotype) Guelph Formation Paleozoic - Silurian Thornton, Illinois

    (c) Unspecified

  • Mollusca - Gastropoda - Euomphalina - Platyceratidae   Platyceras niagarensisSpecimen UC 4655 Racine Formation? Paleozoic - Silurian - Niagaran Chicago, Illinois

    (c) Unspecified

  • Mollusca - Gastropoda - Euomphalina - Euomphalidae   Straparollus magnusSpecimen UC 18104 (holotype) Guelph Formation Paleozoic - Silurian Hawthorne, Illinois

    (c) Unspecified

  • Echinodermata - Crinoidea - Diplobathrida   Lampterocrinus? sp.Specimen P 8866 Racine Formation? Paleozoic - Silurian - Niagaran(~420 million years ago) Romeo, Illinois

    (c) Unspecified

  • Mollusca - Gastropoda - Euomphalina - Euomphalidae     Euomphalus sp.Specimen PE 2924 Racine Foramtion? Paleozoic - Silurian - Niagaran Chicago?, Illinois

    (c) Unspecified

  • Mollusca - Gastropoda - Euomphalina - Euomphalidae   Poleumita sp.Specimen PE 4336 Racine -  Port Byron formations Paleozoic - Silurian - Niagaran Thornton, Illinois

    (c) Unspecified

  • Mollusca - Cephalopoda - Nautiloidea   Kionoceras cancellatumSpecimen UC 18124 Port Byron Formation Paleozoic - Silurian - Niagaran Bridgeport, Illinois

    (c) Unspecified

  • Mollusca - Bivalvia -   Amphicoelia neglectaSpecimen UC 21873 Racine Formation? Paleozoic - Silurian - Niagaran Bridgeport, Illinois

    (c) Unspecified

  • Mollusca - Bivalvia -   Amphicoelia neglectaSpecimen UC 21873 Racine Formation? Paleozoic - Silurian - Niagaran Bridgeport, Illinois

    (c) Unspecified

  • Cnidaria - Anthozoa - Favositida - Favositidae   Favosites hisingeriSpecimen P 478 Racine Formation? Paleozoic - Silurian - Niagaran Hawthorne, Illinois

    (c) Unspecified

  • Brachiopoda - Strophomenata - Orthotetida - Chilidiopsidae   Coolinia subplanaPreviously named: Orthothetes subplanusSpecimen P 5097 Racine Formation? Paleozoic - Silurian - Niagaran Chicago, Illinois

    (c) Unspecified

  • Brachiopoda - Rhynchonellata - Pentamerida - Pentameridae   Kirkidium knightiPreviously identified as Conchidium sp.Specimen P 16393 Racine Formation? Paleozoic - Silurian - Niagaran Thornton, Illinois

    (c) Unspecified

  • Cnidaria - Anthozoa - Rugosa - Stauriida - Acervulariidae   Diplophyllum caespitosum   Previously Diphyphyllum caespitosumSpecimen P 459 Racine Formation? Paleozoic - Silurian - Niagaran Chicago, Illinois

    (c) Unspecified

  • Cnidaria - Anthozoa - Favositida - Favositidae   Favosites hisingeriSpecimen P 478 Racine Formation? Paleozoic - Silurian - Niagaran Hawthorne, Illinois

    (c) Unspecified

  • Cnidaria - Anthozoa - Favositida - Favositidae   Favosites niagarensisSpecimen P 5049 Racine Formation? Paleozoic - Silurian - Niagaran Chicago, Illinois

    (c) Unspecified

  • Cnidaria - Anthozoa - Heliolitida - Halysitidae   Halysites catenulariusSpecimen P 8596 Racine Formation? Paleozoic - Silurian - Niagaran Bellwood, Illinois

    (c) Unspecified

  • Cnidaria - Anthozoa - Rugosa - Stauriida - Acervulariidae   Diplophyllum caespitosum   Previously Diphyphyllum caespitosumSpecimen P 21106 Racine Formation? Paleozoic - Silurian - Niagaran Chicago, Illinois

    (c) Unspecified

  • Mollusca - Cephalopoda - Orthocerida - Dawsonoceratidae   Dawsonoceras annulatumSpecimen P 754 Racine Formation Paleozoic - Silurian - Niagaran Chicgao, Illinois

    (c) Unspecified

  • Bryozoa - Stenolaemata - Fenestrata   Ptiloporella sp.Specimen PE 412 Racine Formation - Port Byron formations Paleozoic - Silurian - Niagaran Thornton, Illinois

    (c) Unspecified

  • Cnidaria - Anthozoa - Favositida - Pachyporidae Coenites reticulata Previously Cladopora reticulata Specimen UC 2783 Racine Formation? Paleozoic - Silurian - Niagaran Chicago, Illinois

    (c) Unspecified

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