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The lichid trilobite Borealarges n. gen., with species from the Silurian of Arctic Canada

Published online by Cambridge University Press:  20 May 2016

Jonathan M. Adrain
Jonathan M. Adrain*
Affiliation:
Department of Earth Sciences, University of Western Ontario, London, Ontario, N6A 5B7, Canada
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Abstract

Borealarges n. gen. (type species B. reedi n. gen. and sp.) is a group of trochurine trilobites of mainly northern Laurentian distribution, closely related to both Richterarges Phleger and Terranovia Maximova. Richterarges is restricted to a Laurentian Ludlow-Přídolí clade of unambiguous monophyly. Taken together, the genera form a monophyletic subdivision of Trochurinae. Phylogenetic relationships within this clade are poorly resolved. The precise relationships of some members of the group are difficult to determine at present, and these species are referred to Borealarges sensu lato. Members of Borealarges are ubiquitous elements of silicified Wenlock–Ludlow trilobite faunas contained in debris flows of the Cape Phillips Formation of the central Canadian Arctic. At present, known post-Wenlock diversity of Borealarges is exclusively northern Laurentian, although this may be a function of lack of study in other areas. New species include B. reedi, B. morrisoni, and B. tuckerae, and B. s.l. B. calei. Borealarges mikulicorum (Perry and Chatterton) is revised.

Type
Research Article
Information
Journal of Paleontology , Volume 68 , Issue 5 , September 1994 , pp. 1081 - 1099
Copyright
Copyright © The Paleontological Society 

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References

Angelin, N. P. 1851. Palaeontologica Scandinavica. Pars. I. Crustacea formationis transitionis. Academiae Regiae Scientarium Suecanae, Holmiae, 24 p.Google Scholar
Barrett, S. T. 1878. The Coralline or Niagara limestone of the Appalachian system as represented at Nearpass's Cliff, Montague, N.J. American Journal of Science, Series 3, 15:370–372.CrossRefGoogle Scholar
Beyrich, E. 1845. Ueber einige böhmische Trilobiten. Berlin, 47 p.Google Scholar
Bolton, T. E. 1965. Trilobites from Upper Silurian rocks of the Canadian Arctic Archipelago: Encrinurus (Frammia) and Hemiarges . Geological Survey of Canada, Bulletin, 134:1–14.Google Scholar
Chatterton, B. D. E. 1971. Taxonomy and ontogeny of Siluro-Devonian trilobites from near Yass, New South Wales. Palaeontographica A, 137:1–108.Google Scholar
Chatterton, B. D. E., and Ludvigsen, R. 1976. Silicified Middle Ordovician trilobites from the south Nahanni River area, District of Mackenzie, Canada. Palaeontographica A, 154:1–106.Google Scholar
Chatterton, B. D. E., and Perry, D. G. 1979. Acanthalomina Prantl and Přibyl, a valid subgenus of the trilobite genus Diacanthaspis . Journal of Paleontology, 53:1327–1342.Google Scholar
Chatterton, B. D. E., Johnson, B. D., and Campbell, K. S. W. 1979. Silicified Lower Devonian trilobites from New South Wales. Palaeontology, 22:799–837.Google Scholar
Churkin, M. Jr. 1961. Silurian trilobites from the Klamath Mountains, California. Journal of Paleontology, 35:168–175.Google Scholar
Clarkson, E. N. K., and Howells, Y. 1981. Upper Llandovery trilobites from the Pentland Hills, Scotland. Palaeontology, 24:507–536.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1993. Silurian (Wenlock–Ludlow) encrinurine trilobites from the Mackenzie Mountains, Canada, and related species. Palaeontographica A, 229:75–112.Google Scholar
Edgell, H. S. 1955. A Middle Devonian lichid trilobite from southeastern Australia. Paläontologische Zeitschrift, 29:136–145.CrossRefGoogle Scholar
Fletcher, T. W. 1850. Observations on Dudley trilobites. Quarterly Journal of the Geological Society of London, 6:235–239.Google Scholar
Goldfuss, A. 1839. Beiträge zur Petrefactenkunde. Verhandlungen der Kaiserlichen Leopoldinisch-Carolinischen der Naturforscher, 19:327–364.Google Scholar
Gürich, G. 1901. Ueber eine neue Lichas-Art aus dem Devon von NE-Süd-Wales und über die Gattung Lichas überhaupt. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, 14:519–539.Google Scholar
Hall, J., and Clarke, J. M. 1888. Descriptions of the trilobites and other Crustacea of the Oriskany, Upper Helderberg, Hamilton and Chemung Groups. New York State Geological Survey, Palaeontology of New York, 7:1–236.Google Scholar
Hawle, I., and Corda, A. J. C. 1847. Prodrom einer Monographie der böhmischen Trilobiten. Prague, 176 p.Google Scholar
Howells, Y. 1982. Scottish Silurian trilobites. Palaeontographical Society [Monograph], 76 p.Google Scholar
International Commission on Zoological Nomenclature. 1985. International Code of Zoological Nomenclature. Third Edition. International Trust for Zoological Nomenclature, London, 338 p.Google Scholar
Kobayashi, T., and Hamada, T. 1977. Devonian trilobites of Japan in comparison with Asian, Pacific and other faunas. Special Papers of the Palaeontological Society of Japan, 20:1–202.Google Scholar
Lamont, A. 1965. Gala-Tarannon trilobites and an ostracod from the Hagshaw Hills, Lanarkshire. Scottish Journal of Science, 1:33–46.Google Scholar
Lane, P. D., Dawes, P. R., and Peel, J. S. 1980. A new Silurian Hemiarges (Trilobita) from North Greenland and the question of the Polaris Harbour Formation. Grønlands Geologiske Undersøgelse, Rapport, 101:45–53.Google Scholar
Lenz, A. C., and Melchin, M. J. 1990. Wenlock (Silurian) graptolite biostratigraphy of the Cape Phillips Formation, Canadian Arctic Islands. Canadian Journal of Earth Sciences, 27:1–13.Google Scholar
Lütke, F. 1990. Contributions to a phylogenetical classification of the subfamily Proetinae Salter, 1864 (Trilobita). Senckenbergiana lethaea, 71:1–83.Google Scholar
Maximova, Z. A. 1977. Devonian trilobites from Novaya Zemlya and other regions of the Soviet arctic. Ezhegodnik Vsesoyuznogo Paleontologischeskogo Obshchestva, 20:140–185 [in Russian].Google Scholar
Milne Edwards, H. 1840. Histoire naturelle des Crustacés, comprenant l'anatomie, la physiologie et la classification de ces animaux, Volume 3. Paris, 638 p.Google Scholar
Norell, M. A. 1992. Taxic origin and temporal diversity: the effect of phylogeny, p. 89–118. In Novacek, M. J. and Wheeler, Q. D. (eds.), Extinction and Phylogeny. Columbia University Press, New York.Google Scholar
Ormiston, A. R. 1982. Terranovia, arctic vicariant of the Devonian lichid Ceratarges (Trilobita). Journal of Paleontology, 56:1257–1265.Google Scholar
Perry, D. G., and Chatterton, B. D. E. 1977. Silurian (Wenlockian) trilobites from Baillie-Hamilton Island, Canadian Arctic Archipelago. Canadian Journal of Earth Sciences, 14:285–319.Google Scholar
Perry, D. G., and Chatterton, B. D. E. 1979. Wenlock trilobites and brachiopods from the Mackenzie Mountains, north-western Canada. Palaeontology, 22:569–607.Google Scholar
Phleger, F. B. 1936. Lichadian trilobites. Journal of Paleontology, 10:593–615.Google Scholar
Přibyl, A., and Erben, H. K. 1952. Über einige neue oder wenig bekannte Acanthopyginae (Tril.) des böhmischen und des deutschen Devons. Paläontologische Zeitschrift, 26:141–174.Google Scholar
Přibyl, A., and Vaněk, J. 1978. Studie zu einigen neuen Trilobiten der Proetidae-Familie. Acta Universitates Carolinae, Geologie, 1/2:163–182.Google Scholar
Ramsköld, L. 1986. Silurian encrinurid trilobites from Gotland and Dalarna, Sweden. Palaeontology, 29:527–575.Google Scholar
Ratte, F. 1886. Note on some trilobites new to Australia. Proceedings of the Linnean Society of New South Wales, 1:1065–1066.Google Scholar
Schmidt, F. 1885. Revision der ostbaltischen Silurischen Trilobiten nebst geognostischer Übersicht der ostbaltischen Silurgebiets, Abt. 2, Acidaspiden und Lichiden. Mémoires de l'Académie Impériale des Sciences de St. Pétersbourg, series 7 33(1):1–127.Google Scholar
Thomas, A. T. 1981. British Wenlock trilobites. Palaeontographical Society [Monograph], Part 2:57–99.Google Scholar
Thomas, A. T. and Holloway, D. J. 1988. Classification and phylogeny of the trilobite order Lichida. Philosophical Transactions of the Royal Society of London, B, Biological Sciences, 321:179–262.Google Scholar
Thomas, A. T., and Narbonne, G. M. 1979. Silurian trilobites from arctic Canada. Geological Magazine, 116:1–19.Google Scholar
Whittington, H. B. 1961. Silurian Hemiarges (Trilobita) from Cornwallis Island and New York State. Journal of Paleontology, 35:433–444.Google Scholar
Yolkin, E. A., and Ormiston, A. R. 1985. Representatives of the genus Terranovia (Trilobita) from the territory of the Soviet Union and arctic North America. Journal of Paleontology, 59:461–474.Google Scholar
Zhi-Qiang, Zhou. 1987. Devonian trilobites from Luqu-Tewo area of west Qinling Mts., China, p. 257–271. In Xi'an Institute of Geology and Mineral Resources, Nanjing Institute of Geology (eds.), Late Silurian–Devonian strata and fossils from Luqu-Tweo area of West Qinling Mountains, China. Volume 2.Google Scholar