Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2025-01-05T12:33:45.120Z Has data issue: false hasContentIssue false
  • English
  • Français

Trilobites of the Pabos Formation (Ashgillian, Upper Ordovician), Percé area, Quebec

Published online by Cambridge University Press:  20 May 2016

Pierre J. Lespérance  and
John A. W. Weissenberger
Pierre J. Lespérance
Affiliation:
Département de géologie, Université de Montréal, P.O. Box 6128, Montréal, Canada H3C 3J7
John A. W. Weissenberger
Affiliation:
Département de géologie, Université de Montréal, P.O. Box 6128, Montréal, Canada H3C 3J7
Get access Rights & Permissions [Opens in a new window]

Abstract

The Ashgillian Pabos Formation underlies the Ashgillian-Llandoverian White Head Formation and consists, in the immediate Percé area, of 21 trilobite taxa. Of these, 11 are left in open nomenclature, four of which are summarily described, commented upon, and illustrated. Ten species are specifically determined and three of these are new: Remopleurides arenosus, Achatella (Achatella) clivosa, and Meadowtownella sacerdos. Hibbertia whittingtoni (McNamara, 1979) is a junior secondary homonym and renamed H. conistonensis. The Ashgillian-Llandoverian cheirurines of the Percé area are reviewed and new generic assignments suggested; these are a major component of the Pabos trilobite fauna. Revision of Ceraurinus icarus, a widely distributed North American species, shows its inherent variability; limits of variation, more complete descriptions, and stratigraphic distribution of most previously described species are also given. The distinctive trinucleid Novaspis elevata occurs in the Pabos, outside the immediate Perce area. Almost all of the Pabos trilobites are also present in the coeval Grande Coupe beds of the Matapedia Group; otherwise they are a mixture of taxa with greatest faunal affinities with North American or northwestern European taxa of the same age.

Type
Research Article
Information
Journal of Paleontology , Volume 72 , Issue 2 , March 1998 , pp. 303 - 316
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Adrain, J. M., and Chatterton, B. D. E. 1993. A new rorringtoniid trilobite from the Ludlow of Arctic Canada. Canadian Journal of Earth Sciences, 30:1634–1643.Google Scholar
Adrain, J. M., and Chatterton, B. D. E. 1994. The aulacopleurid trilobite Otarion, with new species from the Silurian of Northwestern Canada. Journal of Paleontology, 68:305–323.Google Scholar
Adrain, J. M., and Chatterton, B. D. E. 1995a. The otarionine trilobites Harpidella and Maurotarion, with new species from Northwestern Canada, the United States, and Australia. Journal of Paleontology, 69:307–326.Google Scholar
Adrain, J. M., and Chatterton, B. D. E. 1995b. Aulacopleurine trilobites from the Llandovery of Northwestern Canada. Journal of Paleontology, 69:326–340.CrossRefGoogle Scholar
Angelin, N. P. 1854. Palæontologia Scandinavica. Pars I, Iconographia Crustaceorum formationis transitionis, Fasciculum 2, p. i–ix, 21-92, Pl. 25-41, Lund.Google Scholar
Ayrton, W. G., Berry, W. B. N., Boucot, A. J., Lajoie, J., Lespérance, P. J., Pavlides, L., and Skidmore, W. B. 1969. Lower Llandovery of the Northern Appalachians and adjacent regions. Geological Society of America Bulletin, 80:459–483.Google Scholar
Barton, D. C. 1913. A new genus of the Cheiruridae, with description of some new species. Bulletin of the Museum of Comparative Zoölogy at Harvard College, 54:545–556.Google Scholar
Bergström, J. 1968. Upper Ordovician brachiopods from Västergötland, Sweden. Geologica et Palæontologica, 2:1–35.Google Scholar
Billings, E. 1860. Description of some new species of fossils from the Lower and Middle Silurian rocks of Canada. Canadian Naturalist and Geologist, 5:49–69.Google Scholar
Billings, E. 1865. Palæozoic Fossils. I. Containing descriptions and figures of new or little known species of organic remains from the Silurian rocks. Geological Survey of Canada, (fourth portion), 169–344.Google Scholar
Bolton, T. E. 1970. Subsurface Ordovician fauna, Anticosti Island, Quebec, p. 31–41, 136-139. In Contributions to Canadian Paleontology. Geological Survey of Canada, Bulletin 187.Google Scholar
Bolton, T. E. 1972. Geological map and notes on the Ordovician and Silurian litho- and biostratigraphy, Anticosti Island, Quebec. Geological Survey of Canada, Paper 71-19, 45 p.Google Scholar
Bolton, T. E. 1981. Ordovician and Silurian biostratigraphy, Anticosti Island, Québec, p. 41–59. In Lespérance, P. J. (ed.), Field meeting, Anticosti-Gaspé, Québec, 1981. Volume II: Stratigraphy and Paleontology. International Union of Geological Sciences, Subcommission on Silurian Stratigraphy, Ordovician-Silurian boundary Working Group, Département de géologie, Université de Montréal, Montréal.Google Scholar
Boucot, A. J., Field, M. T., Fletcher, R., Forbes, W. H., Naylor, R. S., and Pavlides, L. 1964. Reconnaissance bedrock geology of the Presque Isle Quadrangle Maine. Maine Geological Survey, Quadrangle Mapping Series No. 2, 123 p.Google Scholar
Bradley, J. H. Jr. 1930. Fauna of the Kimmswick Limestone of Missouri and Illinois. Contributions from Walker Museum, 2:i–v, 219-290.Google Scholar
Bruton, D. L. 1965. The Middle Ordovician of the Oslo region, Norway. 19. The trilobite family Odontopleuridae. Norsk Geologisk Tidsskrift, 45:339–356.Google Scholar
Bruton, D. L. 1966. A revision of the Swedish Ordovician Odontopleuridae (Trilobita). Publications from the Palæontological Institution of the University of Uppsala, 67, 40 p. (also, The Bulletin of the Geological Institutions of the University of Uppsala, 43).Google Scholar
Bruton, D. L. 1968a. A revision of the Odontopleuridae (Trilobita) from the Palaeozoic of Bohemia. Skrifter utgitt av Det Norske Videnskaps-Akademi i Oslo. I. Mat-Naturv. Klasse, Ny Serie, 25, 73 p.Google Scholar
Bruton, D. L. 1968b. Ordovician odontopleurid trilobites from Estonia and Latvia. Lethaia, 1:288–302.Google Scholar
Burmeister, H. 1843. Die Organisation der Trilobiten, aus ihren lebenden Verwandten entwickelt: nebst einer systematischen Übersicht aller zeither beschriebenen Arten. Berlin, 147 p. (fide Ramsköld and Chatterton, 1991).Google Scholar
Chatterton, B. D. E. 1980. Ontogenetic studies of Middle Ordovician trilobites from the Esbataottine Formation, Mackenzie Mountains, Canada. Palaeontographica, Abteilung A, 171:1–74.Google Scholar
Chatterton, B. D. E., and Perry, D. G. 1983. Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. Palaeontographica Canadiana, 1, 127 p.Google Scholar
Clarke, J. M. 1907. Some new Devonic fossils, p. 153–292. In Geological papers. New York State Museum Bulletin 107 (Geology 12), New York State Education Department Bulletin 401.Google Scholar
Cooper, B. N. 1953. Trilobites from the Lower Champlainian formations of the Appalachian Valley. Geological Society of America, Memoir 55, 69 p.Google Scholar
Cooper, G. A., and Kindle, C. H. 1936. New brachiopods and trilobites from the Upper Ordovician of Percé, Quebec. Journal of Paleontology, 10:348–372.Google Scholar
Cooper, G. A., and Kindle, C. H. 1947. Remopleurides sinclairi new name. Journal of Paleontology, 21:76.Google Scholar
Dean, W. T. 1963. The Ordovician trilobite faunas of South Shropshire, 3. Bulletin of the British Museum (Natural History), Geology, 7:213–254.Google Scholar
Dean, W. T. 1971. The trilobites of the Chair of Kildare Limestone (Upper Ordovician) of eastern Ireland. Palaeontographical Society Monographs, Part 1, p. 1–25.Google Scholar
Delo, D. M. 1935. A revision of the phacopid trilobites. Journal of Paleontology, 9:402–420.Google Scholar
Evitt, W. R. 1953. Observations on the trilobite Ceraurus . Journal of Paleontology, 27:33–48.Google Scholar
Foerste, A. F. 1919. Silurian fossils from Ohio, with notes on related species from other horizons. The Ohio Journal of Science, 19:367–408.Google Scholar
Foerste, A. F. 1936. Cephalopods from the Upper Ordovician of Percé, Quebec. Journal of Paleontology, 10:373–384.Google Scholar
Green, J. 1832. Monograph of the trilobites of North America. J. Brano, Philadelphia, 93 p.Google Scholar
Hawle, I., and Corda, A. J. C. 1847. Prodrom einer Monographie der böhmishen Trilobiten. Abhandlungen Böhmischen Gesellschaft Wissenschaften Prague, 5:117–292.Google Scholar
Ingham, J. K. 1974. The Upper Ordovician trilobites from the Cautley and Dent districts of Westmorland and Yorkshire. Palaeontographical Society Monographs, Part 2, p. 59–87.Google Scholar
Jaanusson, V., and Ramsköld, L. 1993. Pterygometopine trilobites from the Ordovician of Baltoscandia. Palaeontology, 36:743–769.Google Scholar
Jones, T. R., and Woodward, H. 1898. A monograph of the British Palaeozoic Phyllopoda (Phyllocarida, Packard). The Palæontographical Society, p. 1–31 (fide Owen, 1981).Google Scholar
Kegel, W. 1928. Über obersilurische Trilobiten aus dem Harz und dem Rheinischen Schiefergebirge. Jahrbuch der Preussischen Geologischen der Landesanstalt zu Berlin für das Jahr 1927, 48:616–647.Google Scholar
Kielan-Jaworowska, Z., Bergström, J., and Ahlberg, P. 1991. Cheirurina (Trilobita) from the Upper Ordovician of Västergötland and other regions of Sweden. Geologiska Föreningens i Stockholm Fördhandlingar, 113:219–244.Google Scholar
Kindle, C. H. 1945. Two cephalopods and arthropods from the Whitehead Formation. American Journal of Science, 243:159–162.Google Scholar
Kirkwoord, D. 1989. Géologie structurale de la région de Percé (Gaspésic). Québec, Ministère de l'Énergie et des Ressources (Mines), ET 87-17, 33 p.Google Scholar
Lane, P. D. 1971. British Cheiruridae (Trilobita). Palaeontographical Society Monographs, 95 p.Google Scholar
Lespérance, P. J. 1968a. Ordovician and Silurian trilobite faunas of the White Head Formation, Percé region, Québec. Journal of Paleontology, 42:811–826.Google Scholar
Lespérance, P. J. 1968b. Faunal affinities of the trilobite faunas, White Head Formation, Percé region, Quebec, Canada, p. 145–159. In International Geological Congress, Report of Twenty-third session Czechoslovakia 1968, Proceedings of section 9.Google Scholar
Lespérance, P. J., and Desbiens, S. 1995. Selected Ordovician trilobites from the Lake St. John district of Quebec and their bearing on systematics. Paleontological Society Memoir 42 (Journal of Paleontology, 69[4]Supplement), 19 p.Google Scholar
Lespérance, P. J., Malo, M., Sheehan, P. M., and Skidmore, W. B. 1987. A stratigraphical and faunal revision of the Ordovician-Silurian strata of the Percé area, Quebec. Canadian Journal of Earth Sciences, 24:117–134.Google Scholar
Lespérance, P. J., Sheehan, P. M., and Skidmore, W. B. 1981. Correlation of the White Head and related strata of the Percé region, p. 223–229. In Lespérance, P. J. (ed.), Field meeting, Anticosti-Gaspé, Québec, 1981. Volume II: Stratigraphy and Paleontology. International Union of Geological Sciences, Subcommission on Silurian Stratigraphy, Ordovician-Silurian boundary Working Group, Département de géologic, Université de Montréal, Montréal.Google Scholar
Lespérance, P. J., and Tripp, R. P. 1985. Encrinurids (Trilobita) from the Matapédia Group (Ordovician), Percé, Québec. Canadian Journal of Earth Sciences, 22:205–213.Google Scholar
Ludvigsen, R. 1977. The Ordovician trilobite Ceraurinus Barton in North America. Journal of Paleontology, 51:959–972.Google Scholar
Ludvigsen, R. 1979. A trilobite zonation of Middle Ordovician rocks, Southwestern District of Mackenzie. Geological Survey of Canada, Bulletin 312, 99 p.Google Scholar
Ludvigsen, R. and Chatterton, B. D. E. 1982. Ordovician Pterygometopidae (Trilobita) of North America. Canadian Journal of Earth Sciences, 19:2179–2206.Google Scholar
Malo, M. 1988a. Stratigraphy of the Aroostook-Percé Anticlinorium in the Gaspé Peninsula, Quebec. Canadian Journal of Earth Sciences, 25:893–908.Google Scholar
Malo, M. 1988b. Stratigraphie et structure de l'anticlinorium d' Aroostook-Percé de l'est de la Gaspésie. Québec, Ministère de l'Énergie et des Ressources, ET 87-06, 42 p.Google Scholar
McNamara, K. J. 1979. Trilobites from the Coniston Limestone Group (Ashgill Series) of the Lake District, England. Palaeontology, 22:53–92.Google Scholar
M'Coy, F. 1846. A Synopsis of the Silurian Fossils of Ireland. Dublin, 72 p. (fide Whittington and Campbell, 1967).Google Scholar
M'Coy, F. 1849. On the classification of some British fossil Crustacea, with notices of new forms in the University collection at Cambridge. Annals and Magazine of Natural History, Series 2, 4:161–179, 330-335, 392-414 (fide Whittington and Campbell, 1967).Google Scholar
Meek, F. B. 1872. Descriptions of new species of fossils from the Cincinnati Group of Ohio. The American Journal of Science and Arts, (3)3:423–428.Google Scholar
Miller, S. A. 1889. North American Geology and Palaeontology. Cincinnati, 664 p. (fide Morris and Tripp, 1986).Google Scholar
Morris, S. F., and Tripp, R. P. 1986. Lectotype selections for Ordovician trilobites from the Girvan District, Strathclyde. Bulletin of the British Museum (Natural History), Geology series, 40:161–176.Google Scholar
Nikolaisen, F. 1983. The Middle Ordovician of the Oslo Region, Norway, 32. Trilobites of the family Remopleurididae. Norsk Geologisk Tidsskrift, 62:231–329.Google Scholar
Opinion 614. 1961. Sphaerocoryphe Angelin, (1854) (Trilobita); designation of a type-species under the plenary powers. The Bulletin of Zoological Nomenclature, 18:357–358.Google Scholar
Opinion 1436. 1987. Harpidae Hawle & Corda, 1847 (Trilobita) and Harpidae Bronn, 1849 (Mollusca, Gastropoda): a ruling to remove the homonymy. The Bulletin of Zoological Nomenclature, 44:137–138.Google Scholar
Owen, A. W. 1981. The Ashgill trilobites of the Oslo region, Norway. Palaeontographica, Abteilung A, 175:1–88.Google Scholar
Owen, A. W. 1986. The uppermost Ordovician (Hirnantian) trilobites of Girvan, SW Scotland with a review of coeval trilobite faunas. Transactions of the Royal Society of Edinburgh: Earth Sciences, 77:231–239.Google Scholar
Owen, A. W., and Bruton, D. L. 1980. Late Caradoc-early Ashgill trilobites of the central Oslo Region, Norway. Paleontological Contributions from the University of Oslo, No. 245, 63 p.Google Scholar
Owen, A. W., and Clarkson, E. N. K. 1992. Trilobites from Kilbucho and Wallace's Cast and the location of the Northern Belt of the Southern Uplands during the late Ordovician. Scottish Journal of Geology, 28:3–17.Google Scholar
Owen, A. W., Tripp, R. P., and Morris, S. F. 1986. The trilobite fauna of the Raheen Formation (upper Caradoc), Co. Waterford, Ireland. Bulletin of the British Museum (Natural History), Geology series, 40:91–122.Google Scholar
Portlock, J. E. 1843. Report on the geology of the county of Londonderry and of parts of Tyrone and Fermanagh. Her Majesty's Stationery Office, Dublin, 784 p.Google Scholar
Prantl, F., and Přibyl, A. 1948. Classification of some Bohemian Cheiruridae. (Trilobitae). Sborník Národního Musea v Praze (Acta Musei Nationalis Pragae), 3B(1):1–44.Google Scholar
Prantl, F., and Přibyl, A. 1949. A study of the superfamily Odontopleuracea nov. superfam. (Trilobites). Státního Geologického Ustavu, Československé Republiky, Rozpravy 12, 221 p. (English summary, p. 117-221).Google Scholar
Přibyl, A., and Vaněk, J. 1965. Neue Trilobiten des böhmischen Ordoviziums. Vestník Ústredního Ústavu Geologickěho, 40:277–282.Google Scholar
Přibyl, A., 1986. A study of the morphology and phylogeny of the family Harpetidae Hawle and Corda, 1847. Sborník Národního Musea v Praze (Acta Musei Nationalis Pragae), 42B(1-2):1–72.Google Scholar
Ramsköld, L. 1991. Pattern and process in the evolution of the Odontopleuridae (Trilobita). The Selenopeltinae and Ceratocephalinae. Transactions of the Royal Society of Edinburgh: Earth Sciences, 82:143–181.Google Scholar
Ramsköld, L., and Chatterton, B. D. E. 1991. Revision and subdivision of the polyphyletic ‘Leonaspis’ (Trilobita). Transactions of the Royal Society of Edinburgh: Earth Sciences, 82:333–371.Google Scholar
Raymond, P. E., and Walcott, C. D. 1913. Subclass Trilobita, p. 692–729. In Eastman, C. R. (ed.), Text-book of Paleontology, 2nd edition, Volume 1. Macmillan and Company, London.Google Scholar
Reed, F. R. C. 1905. The classification of the Phacopidae. Geological Magazine, (5)2:172–178, 224-228.Google Scholar
Reed, F. R. C. 1906. The Lower Palæozoic trilobites of the Girvan District, Ayrshire. The Palæontographical Society [Monographs], p. 97–186.Google Scholar
Reed, F. R. C. 1914. The Lower Palæozoic trilobites of Girvan. Supplement. The Palæontographical Society [Monographs], 56 p.Google Scholar
Ross, R. J. Jr. 1979. Additional trilobites from the Ordovician of Kentucky, p. D1–D13. In Pojeta, J. Jr. (ed.), Contributions to the Ordovician paleontology of Kentucky and nearby states. U.S. Geological Survey Professional Paper, 1066.Google Scholar
Ross, R. J. Jr., Nolan, T. B., and Harris, A. G. 1980. The Upper Ordovician and Silurian Hanson Creek Formation of Central Nevada. U.S. Geological Survey Professional Paper, 1126C:C1–C22.Google Scholar
Salter, J. W. 1864. A monograph of British trilobites. The Palæontographical Society, 1:1–80.Google Scholar
Schuchert, C., and Cooper, G. A. 1930. Part I. Schuchert, C. Stratigraphy and faunas, p. 161–176. Part II. Cooper, G. A. New species from the Upper Ordovician of Percé, p. 265–288, 365-392. In American Journal of Science, Fifth Series, 20.Google Scholar
Shaw, F. C. 1968. Early Middle Ordovician Chazy trilobites of New York. New York State Museum and Science Service, Memoir 17, 163 p.Google Scholar
Shaw, F. C. 1974. Simpson Group (Middle Ordovician) trilobites of Oklahoma. The Paleontological Society Memoir 6 (Journal of Paleontology, 48[5]Supplement), 54 p.Google Scholar
Sheehan, P. M., and Lespérance, P. J. 1979. Late Ordovician (Ashgillian) brachiopods from the Percé region of Quebec. Journal of Paleontology, 53:950–967.Google Scholar
Sinclair, G. W. 1947. Two examples of injury in Ordovician trilobites. American Journal of Science, 245:250–257.Google Scholar
Thomas, A. T., and Owens, R. M. 1978. A review of the trilobite family Aulacopleuridae. Palaeontology, 21:65–81.Google Scholar
Tripp, R. P. 1954. Caradocian trilobites from mudstones at Craighead quarry, near Girvan, Ayrshire. Transactions of the Royal Society of Edinburgh, 62:655–693.Google Scholar
Tripp, R. P. 1965. Trilobites from the Albany Division (Ordovician) of the Girvan District, Ayrshire. Palaeontology, 8:577–603.Google Scholar
Tripp, R. P., Rudkin, D. M., and Evitt, W. R. 1997. Silicified trilobites of the genus Sphaerocoryphe from the Middle Ordovician of Virginia. Canadian Journal of Earth Sciences, 34:770–788.Google Scholar
Twenhofel, W. H. 1928[1927]. Geology of Anticosti Island. Geological Survey of Canada, Memoir 154, 481 p.Google Scholar
Warburg, E. 1925. The trilobites of the Leptæna Limestone in Dalarne. With a discussion of the zoological position and the classification of the Trilobita. Bulletin of the Geological Institution of the University of Upsala, 17:i–vi, 1-446 (also published with the same pagination and a distinct title page with the mention Inaugural Dissertation, May 25th, 1925).Google Scholar
Westrop, S. R., and Ludvigsen, R. 1983. Systematics and paleoecology of Upper Ordovician trilobites from the Selkirk Member of the Red River Formation, southern Manitoba. Manitoba, Department of Energy and Mines, Mineral Resources Division, Geological Report GR 82-2, 51 p.Google Scholar
Whittard, W. F. 1961. The Ordovician trilobites of the Shelve Inlier, West Shropshire. Palaeontographical Society [Monographs] part 6, p. 197–228.Google Scholar
Whittington, H. B. 1950a. A monograph of the British trilobites of the Family Harpidae. The Palaeontographical Society, 55 p.Google Scholar
Whittington, H. B. 1950b. Platyharpes Whittington, 1950, a synonym of Hibbertia Jones and Woodward, 1898. Geological Magazine, 87:302.Google Scholar
Whittington, H. B. 1950c. Sixteen Ordovician genotype trilobites. Journal of Paleontology, 24:531–565.Google Scholar
Whittington, H. B. 1954. Ordovician trilobites from Silliman's fossil mount, p. 119–149. In Miller, A. K., Youngquist, W., and Collinson, C., Ordovician Cephalopod Fauna of Baffin Island. Geological Society of America, Memoir 62.Google Scholar
Whittington, H. B. 1956. Silicified Middle Ordovician trilobites: the Odontopleuridae. Bulletin of the Museum of Comparative Zoology at Harvard College, 114:153–288.Google Scholar
Whittington, H. B., and Campbell, K. S. W. 1967. Silicified Silurian trilobites from Maine. Bulletin of the Museum of Comparative Zoology, 135:447–483.Google Scholar
Whittington, H. B., and Evitt, W. R. II. 1954. Silicified Middle Ordovician trilobites. Geological Society of America, Memoir 59, 137 p.Google Scholar