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  1. Additional notes on Asaphus canalis, Conrad. Bulletin of the AMNH ; v. 2, article 4.
    By: Seely, Henry Martyn, 1828-1917. - Whitfield, Robert Parr, 1828-1910.
    Publication info: New York : American Museum of Natural History 1889
    Contributed by: American Museum of Natural History Library
    Subjects: Arthropoda, Fossil  Asaphus canalis  Champlain, Lake  Ordovician  Paleontology  Trilobites  Vergennes Region  Vermont  
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  2. Bibliographic index of American Ordovician and Silurian fossils, by Ray S. Bassler.
    By: Bassler, Ray S.
    Publication info: Washington,Govt. Print. Off.,1915.
    Contributed by: University of California Libraries (archive.org)
    Subjects: Bibliography  Ordovician  Paleontology  Silurian  
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  3. The Bryozoa of the Lower Silurian in Minnesota,
    By: Ulrich, Edward Oscar,
    Publication info: Minneapolis,1893
    Contributed by: Cornell University Library
    Subjects: Bryozoa, Fossil  Minnesota  Ordovician  Paleontology  
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  4. The calciferous formation in the Champlain Valley. Bulletin of the AMNH ; v. 3, article 1.
    By: Brainerd, Ezra, 1844-1924. - Seely, Henry Martyn, 1828-1917.
    Publication info: New York : Published by order of the Trustees, American Museum of Natural History 1890
    Contributed by: American Museum of Natural History Library
    Subjects: Champlain Valley  Geology  Geology, Stratigraphic  New York (State)  Ordovician  Vermont  
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  5. Cambrian and Ordovician / Maryland Geological Survey.
    By: Maryland Geological Survey. - Bassler, Ray S.
    Publication info: Baltimore :The Johns Hopkins press,1919.
    Contributed by: University of California Libraries (archive.org)
    Subjects: Cambrian  Geology  Geology, Stratigraphic  Maryland  Ordovician  Paleontology  
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  6. Catalogue of fossils occurring in the Cincinnati group of Ohio, Indiana and Kentucky / by E. O. Ulrich.
    By: Ulrich, Edward Oscar,
    Publication info: Cincinnati,Printed by James Barclay,1880.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    Subjects: Catalogs and collections  Fossils  Ordovician  Paleontology  United States  
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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  7. Catalogue of the fossils for the Cincinnati group / by Jos. F. James, custodian Cincinnati society of natural history. Published by order of Committee on palaeontology.
    By: James, Joseph F. - Cincinnati Society of Natural History.
    Publication info: Cincinnati :Printed by J. Barclay,1881.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    Subjects: Catalogs and collections  Fossils  Ordovician  Paleontology  
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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  8. The Chazy of Lake Champlain. Bulletin of the AMNH ; v. 8, article 21.
    By: Brainerd, Ezra, 1844-1924. - Seely, Henry Martyn, 1828-1917.
    Publication info: New York : Published by order of the Trustees, American Museum of Natural History 1896
    Contributed by: American Museum of Natural History Library
    Subjects: Champlain, Lake  Geology  Geology, Stratigraphic  New York (State)  Ordovician  Vermont  
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  9. Descriptions of new species of Silurian fossils from near Fort Cassin and elsewhere on Lake Champlain. Bulletin of the AMNH ; v. 9, article 11.
    By: Perkins, George H. (George Henry), 1844-1933. - Seely, Henry Martyn, 1828-1917. - Whitfield, Robert Parr, 1828-1910.
    Publication info: New York : Published by order of the Trustees, American Museum of Natural History 1897
    Contributed by: American Museum of Natural History Library
    Subjects: Champlain, Lake, Region  Invertebrates, Fossil  New York (State)  Ordovician  Paleontology  Silurian  Vergennes Region  Vermont  
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  10. Figures and descriptions of Canadian organic remains.
    By: Billings, E. - Hall, James, - Jones, T. Rupert - Salter, John William, - Thompson, John Vaughan, - Geological Survey of Canada.
    Publication info: Montreal :Printed by J. Lovell,1858-1865 (v. 1, 1859)
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    Subjects: Canada  Ordovician  Paleontologie  Paleontology  Silurian  
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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  11. The geology about Mills [sic] Springs, Monticello Quadrangle, Kentucky. American Museum novitates ; no. 11
    By: Foyles, Edward J.
    Publication info: [New York City : By order of the Trustees of The American Museum of Natural History 1921
    Contributed by: American Museum of Natural History Library
    Subjects: Geology  Geology, Stratigraphic  Kentucky  Mill Springs Region  Mississippian  Ordovician  Pennsylvanian  
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  12. Late Ordovician channel-dwelling crinoids from southern Ontario, Canada. American Museum novitates ; no. 2665
    By: Haugh, Bruce N.
    Publication info: New York, N.Y. : American Museum of Natural History 1979
    Contributed by: American Museum of Natural History Library
    Subjects: Crinoidea, Fossil  Echinodermata, Fossil  Ontario  Ordovician  Paleontology  Parisocrinus mulletensis  Rheocrinus aduncus  
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  13. The Lower Silurian Lamellibranchiata of Minnesota.
    By: Ulrich, Edward Oscar,
    Publication info: [Minneapolis]1894.
    Contributed by: Cornell University Library
    Subjects: Bivalves  Minnesota  Ordovician  Paleontology  
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  14. The Lower Silurian Ostracoda of Minnesota. By E. O. Ulrich.
    By: Ulrich, Edward Oscar,
    Publication info: [Minneapolis]1894.
    Contributed by: Cornell University Library
    Subjects: Minnesota  Ordovician  Ostracoda  Paleontology  
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  15. The Lower Siluric shales of the Mohawk valley, by Rudolf Ruedemann.
    By: Ruedemann, Rudolf,
    Publication info: Albany,University of the State of New York,1912.
    Contributed by: University of California Libraries (archive.org)
    Subjects: Geology  Geology, Stratigraphic  Mohawk Valley  New York (State)  Ordovician  Paleontology  
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  16. Morphology and arrangement of meromes in Ischadites dixonensis, an Ordovician Receptaculitid / Daniel C. Fisher -- and Matthew H. Nitecki --.
    By: Fisher, Daniel C. - Nitecki, Matthew H.
    Publication info: Chicago :Field Museum of Natural History,1978.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Illinois  Ischadites dixenensis  Ordovician  Paleobotany  
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  17. New Archaeoscyphia (Porifera) from the Ordovician of Anticosti Island, Quebec / J. Keith Rigby -- and Matthew H. Nitecki --.
    By: Rigby, J. Keith. - Nitecki, Matthew H.,
    Publication info: [Chicago] :Field Museum of Natural History,1973.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Anticosti Island  Ordovician  Paleontology  Québec (Province)  Sponges, Fossil  
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  18. New trilobites from the Maquoketa beds of Fayette county, Iowa / by Arthur Ware Slocom -- ; Oliver Cummings Farrington --
    By: Slocom, Arthur Ware, - Farrington, Oliver C. - Field Museum of Natural History.
    Publication info: Chicago :Field Museum of Natural History ,1913.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Fayette County  Iowa  Ordovician  Paleontology  Trilobites  
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  19. North American cyclocrinitid algae / [by] Matthew H. Nitecki --
    By: Nitecki, Matthew H.
    Publication info: [Chicago]Field Museum of Natural History,1970.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Dasycladaceae, Fossil  North America  Ordovician  Paleontology  Silurian  
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  20. North American Silurian receptaculitid algae / [by] Matthew H. Nitecki -- [Patricia M. Williams, -- editor --]
    By: Nitecki, Matthew H. - Williams, Patricia M.
    Publication info: Chicago :Field Museum Press ,1972.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Dasycladaceae, Fossil  North America  Ordovician  Paleontology  Silurian  
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  21. Notes and descriptions of some new or hitherto unrecorded species of fossils from the Cambro-Silurian (Ordovician) rocks of the province of Quebec by Henry M. Ami.
    By: Ami, Henry M.
    Publication info: Montreal :s.n.,1892?
    Contributed by: Canadiana.org (archive.org)
    Subjects: Geology  Ordovician  Paleontology  Québec (Province)  
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  22. Notice of a new fossil body, probably a sponge related to Dictyophyton. Bulletin of the AMNH ; v. 1, article 18.
    By: Whitfield, Robert Parr, 1828-1910.
    Publication info: New York : American Museum of Natural History 1886
    Contributed by: American Museum of Natural History Library
    Subjects: Kenwood Region  New York (State)  Ordovician  Paleontology  Rhombodictyon discum  Rhombodictyon reniforme  Sponges, Fossil  
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  23. Notice of geological investigations along the eastern shore of Lake Champlain, conducted by Prof. H.M. Seely and Prest. Ezra Brainerd, of Middlebury College, with descriptions of the new fossils discovered. Bulletin of the AMNH ; v. 1, article 17.
    By: Brainerd, Ezra, 1844-1924. - Seely, Henry Martyn, 1828-1917. - Whitfield, Robert Parr, 1828-1910.
    Publication info: New York : American Museum of Natural History 1886
    Contributed by: American Museum of Natural History Library
    Subjects: Arthropoda, Fossil  Champlain, Lake  Geology  Mollusks, Fossil  Ordovician  Paleontology  Vergennes Region  Vermont  
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  24. Observations on some imperfectly known fossils from the calciferous sandrock of Lake Champlain, and descriptions of several new forms. Bulletin of the AMNH ; v. 2, article 3.
    By: Seely, Henry Martyn, 1828-1917. - Whitfield, Robert Parr, 1828-1910.
    Publication info: New York : American Museum of Natural History 1889
    Contributed by: American Museum of Natural History Library
    Subjects: Beekmantown Region  Champlain, Lake  Fossils  Invertebrates, Fossil  New York (State)  Ordovician  Paleontology  
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  25. Observations on the fauna of the rocks at Fort Cassin, Vermont, with descriptions of a few new species. Bulletin of the AMNH ; v. 3, article 2.
    By: Brainerd, Ezra, 1844-1924. - Perkins, George H. (George Henry), 1844-1933. - Seely, Henry Martyn, 1828-1917. - Whitfield, Robert Parr, 1828-1910.
    Publication info: New York : Published by order of the Trustees, American Museum of Natural History 1890
    Contributed by: American Museum of Natural History Library
    Subjects: Invertebrates, Fossil  Ordovician  Paleontology  Vergennes Region  Vermont  
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  26. On new forms of marine algae from the Trenton Limestone, with observations on Buthograptus laxus Hall. Bulletin of the AMNH ; v. 6, article 16.
    By: Hall, James, 1811-1898. - Whitfield, Robert Parr, 1828-1910.
    Publication info: New York : Published by order of the Trustees, American Museum of Natural History 1894
    Contributed by: American Museum of Natural History Library
    Subjects: Algae, Fossil  Herkimer County  New York (State)  Ordovician  Paleobotany  Platteville Region  Trenton Limestone  Wisconsin  
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  27. On the nature of the holotype of Nipterella paradoxica (Billings) / [by] Matthew H. Nitecki --
    By: Nitecki, Matthew H.
    Publication info: [Chicago] :Field Museum of Natural History,1968.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Mingan Islands  Nipterella paradoxica  Ordovician  Paleontology  Québec (Province)  
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  28. Ordovician Batophoreae (Dasycladales) from Michigan / Matthew H. Nitecki --.
    By: Nitecki, Matthew H.
    Publication info: Chicago :Field Museum of Natural History,1976.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Archaeobatophora typa  Delta County  Michigan  Ordovician  Paleobotany  
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  29. Ordovician fossils of north China,
    By: Grabau, Amadeus W.
    Publication info: Peking,Published by the Geological Survey of China,1922.
    Contributed by: Cornell University Library
    Subjects: China  Ordovician  Paleontology  
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  30. Ordovician fossils of north China, by Amadeus W. Grabau, with plates I-IX and 20 text figures.
    By: Grabau, Amadeus W.
    Publication info: Peking :Published by the Geological Survey of China,1922.
    Contributed by: University of California Libraries (archive.org)
    Subjects: China  Ordovician  Paleontology  
    View Book
  31. Ordovician Receptaculites camacho n. sp. from Argentina / Matthew H. Nitecki -- and Gerald G. Forney --.
    By: Nitecki, Matthew H. - Forney, Gerald Glenn. - Field Museum of Natural History.
    Publication info: Chicago :Field Museum of Natural History,1978.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Algae, Fossil  Argentina  Ordovician  Paleobotany  
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  32. The Ordovician trilobite Pseudogygites Kobayashi in eastern and Arctic North America /
    By: Ludvigsen, Rolf. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1979.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: North America  Ordovician  Paleontology  Trilobites  
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  33. Ordovician vertebrates from Western United States / Robert H. Denison --
    By: Denison, Robert H.
    Publication info: [Chicago] :Field Museum of Natural History,1967.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Ordovician  Paleontology  Vertebrates, Fossil  West (U.S.)  
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  34. Organic buildups in the Lower Ordovician (Canadian) of Texas and Oklahoma / Donald Francis Toomey -- and Matthew H. Nitecki --.
    By: Toomey, Donald F. - Nitecki, Matthew H. - Field Museum of Natural History.
    Publication info: [Chicago] :Field Museum of Natural History,1979.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Algae, Fossil  Oklahoma  Ordovician  Paleontology  Sponges, Fossil  Texas  
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  35. Phosphatic microfossils from the Ordovician of the United States / Matthew H. Nitecki --, Raymond C. Gutschick --, John E. Repetski --.
    By: Nitecki, Matthew H. - Gutschick, Raymond C. - Repetski, John E.,
    Publication info: Chicago :Field Museum of Natural History,1975.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Micropaleontology  Ordovician  Paleontology  Phosphates  United States  
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  36. Preliminary studies of the ultrastructure of selected Ordovician conodonts /
    By: Barnes, Christopher R. - Monroe, E. A. - Sass, Daniel B. - Royal Ontario Museum.
    Publication info: [Toronto] :Royal Ontario Museum,1970.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Conodonts  Ordovician  Paleontology  
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  37. Redescription of type specimens of bryozoan Stigmatella from the Upper Ordovician of the Toronto region, Ontario /
    By: Fritz, Madeleine A. - Royal Ontario Museum.
    Publication info: [Toronto] :Royal Ontario Museum,1973.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Ontario  Ordovician  Paleontology  Stigmatella  Toronto Region  
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  38. Redescription of type specimens of species of the bryozoan genera Monticulipora, Mesotrypa, Peronopora, and Prasopora, from the upper Ordovician rocks of Toronto and vicinity, Ontario, Canada /
    By: Fritz, Madeleine A. - Royal Ontario Museum.
    Publication info: [Toronto] :Royal Ontario Museum,1976.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Bryozoa, Fossil  Ontario  Ordovician  Paleontology  Toronto Region  
    View Book
  39. Redescription of type specimens of species of the Bryozoan genera Atactoporella, Homoptrypa, and Homotrypella from the Upper Ordovician Rocks of the Credit River Valley, Ontario, Canada /
    By: Fritz, Madeleine A. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1977.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Bryozoa, Fossil  Credit River Valley  Ontario  Ordovician  Paleontology  Type specimens  
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  40. Redescription of type specimens of species of the Bryozoan genera Dekayia, Homotrypa, and Stigmatella from Upper Ordovician rocks along Workman's Creek, Ontario /
    By: Fritz, Madeleine A. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1982.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Bryozoa, Fossil  Ontario  Ordovician  Paleontology  Workman's Creek  
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  41. Redescription of type specimens of the Bryozoan Heterotrypa from Upper Ordovician Rocks of the Credit River Valley, Ontario, Canada /
    By: Fritz, Madeleine A. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1975.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Credit River Valley  Ontario  Ordovician  Paleontology  
    View Book
  42. Revised phylogeny and functional interpretation of the Edrioasteroidea based on new taxa from the Early and Middle Ordovician of western Utah / Thomas E. Guensburg --, James Sprinkle --.
    By: Guensburg, Thomas Edgar. - Sprinkle, James, - Field Museum of Natural History.
    Publication info: Chicago, Ill. :Field Museum of Natural History,1994.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Classification  Echinodermata, Fossil  Edrioasteroidea  Ordovician  Paleontology  Utah  
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  43. Spechts Ferry (Middle Ordovician) bryozoan fauna from Illinois, Wisconsin, and Iowa.
    By: Perry, Thomas G.
    Publication info: Urbana,1962.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Bryozoa, Fossil  Middle west  Ordovician  Paleontology  
    View Book
  44. Stipatocrinus, a new and unusual camerate crinoid from the lower silurian of western New York /
    By: Eckert, James D., - Brett, Carlton E. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1987.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Crinoidea, Fossil  New York (State)  Ordovician  Paleontology  
    View Book
  45. Stratigraphy and paleontology of the Credit River section, accompanied by seven plates, also insert entitled "Composite section of the rocks of the Credit River.
    By: Dyer, William Spafford, - Toronto, Ont.
    Publication info: [TorontoThe United Press][192-?]
    Contributed by: Gerstein - University of Toronto (archive.org)
    Subjects: Credit River  Ontario  Ordovician  Paleontology  Paleontology, Stratigraphic  
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  46. Systematic ichnology of the Late Ordovician Georgian Bay formation of southern Ontario, eastern Canada /
    By: Stanley, D. Christopher A. - Pickerill, R. K. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,c1998.
    Contributed by: Royal Ontario Museum (archive.org)
    Subjects: Ichnology  Ontario, Southern  Ordovician  Paleontology  Trace fossils  
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  47. Traces of the Ordovican [sic] system on the Atlantic coast and organic remains of Little River Group, no. IV
    By: Matthew, G. F.
    Publication info: Ottawa :J. Durie,1895.
    Contributed by: Canadiana.org (archive.org)
    Subjects: Insects, Fossil  Ordovician  Paleontology  
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  48. The trilobites Bathyurus and Eomonorachus from the Middle Ordovician of Oklahoma and their biofacies significance /
    By: Ludvigsen, Rolf. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1978.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Oklahoma  Ordovician  Paleontology  Trilobites  
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  49. The type of the stromatoporoid species Stromatocerium rugosum Hall. American Museum novitates ; no. 1728
    By: Galloway, J. J. (Jesse James), 1882- - Hall, James, 1811-1898. - St. Jean, Joseph, 1923-
    Publication info: New York, N.Y. : American Museum of Natural History 1955
    Contributed by: American Museum of Natural History Library
    Subjects: Cnidaria, Fossil  New York (State)  North America  Ordovician  Paleontology  Stromatocerium  Stromatocerium rugosum  Stromatoporoidea  Type specimens  Watertown Region  
    View Book (External)
  50. The type species of the Ordovician trilobite genus Isotelus I. gigas Dekay, 1824 /
    By: Rudkin, David M., - Tripp, Ronald P. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1988.
    Contributed by: Royal Ontario Museum (archive.org)
    Subjects: New York (State)  Ontario  Ordovician  Paleontology  Trilobites  
    View Book
  51. Upper Cambrian and Lower Ordovician trilobite biostratigraphy of the Rabbitkettle Formation, Western District of Mackenzie /
    By: Ludvigsen, Rolf. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1982.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Cambrian  Mackenzie District  Northwest Territories  Ordovician  Paleontology  Trilobites  
    View Book
  52. Upper Cambrian to Lower Ordovician conodont biostratigraphy and biofacies, Rabbitkettle Formation, District of Mackenzie /
    By: Landing, Ed. - Ludvigsen, Rolf. - Von Bitter, Peter H. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1980.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Cambrian  Conodonts  Mackenzie District  Northwest Territories  Ordovician  Paleontology  
    View Book
  53. The Upper Ordovician fauna of Frobisher bay, Baffin Land, by Sharat Kumar Roy.
    By: Roy, Sharat Kumar,
    Publication info: Chicago :Field Museum of Natural History,1941
    Contributed by: University of Illinois Urbana Champaign
    Subjects: (1927-1928)  Baffin Island  Frobisher Bay  Frobisher Bay (Bay)  Nunavut  Ordovician  Ordovicien  Paleontologie  Paleontology  Rawson-MacMillan Sub-Arctic Expedition  Rawson-MacMillan sub-Arctic expedition, 1927-1928  Territoires du Nord-Ouest  
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  54. The upper Ordovician rocks of Kentucky and their bryozoa. By John M. Nickles. 1905.
    By: Nickles, John M.
    Publication info: Louisville [Ky.] :Printed by the Geo. G. Fetter company,1905.
    Contributed by: University of California Libraries (archive.org)
    Subjects: Bryozoa, Fossil  Kentucky  Ordovician  Paleontology  
    View Book