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New Lower Silurian (Llandovery) encrinurine trilobites from the Mackenzie Mountains, Canada

Published online by Cambridge University Press:  14 July 2015

Gregory D. Edgecombe
Gregory D. Edgecombe*
Affiliation:
Department of Geology, University of Alberta, Edmonton, Alberta, T6G 2E3, Canada
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Abstract

Silicified encrinurine trilobites from Telychian strata of the Whittaker Formation east of Avalanche Lake, District of Mackenzie, Canada, include Briania jeffersoni n. gen. and sp. and Johntempleia pamae n. gen. and sp. Morphology of Briania suggests an origin near the divergence of Pacificurus from the variolaris plexus. Johntempleia also includes Rhuddanian–Aeronian diversity from Scotland, and is resolved as the basal branch of the punctatus plexus. Briania jeffersoni and Johntempleia pamae co-occur with rare taxa of the variolaris plexus (“Nucleurus” spp. A and B) in a deep-water assemblage dominated by Cromus and the odontopleurid Stelckaspis. Stratigraphic range data for encrinurine genera identify the late Telychian to early Sheinwoodian as a time of taxonomic turnover.

Type
Research Article
Information
Journal of Paleontology , Volume 68 , Issue 4 , July 1994 , pp. 824 - 837
Copyright
Copyright © The Paleontological Society 

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References

Angelin, N. P. 1851. Palaeontologia Svecica. I: Iconographia crustaceorum formationis transitionis. Fascicule 1:1–24. Regiae Scientarium Suecanae, Holmiae.Google Scholar
Angelin, N. P. 1854. Palaeontologia Scandinavica. I: Crustacea formationis transitionis. Fascicule 2:21–92. Regiae Scientarium Suecanae, Holmiae.Google Scholar
Billings, E. 1866. Catalogue of the Silurian fossils of the island of Anticosti, with descriptions of some new genera and species. Geological Survey of Canada, Separate Report 427:1–93.Google Scholar
Bolton, T. E. 1965. Trilobites from the upper Silurian rocks of the Canadian Arctic Archipelago: Encrinurus (Frammia) and Hemiarges. Geological Survey of Canada, Bulletin 134:1–14.Google Scholar
Bolton, T. E. 1981. Ordovician and Silurian biostratigraphy, Anticosti Island, Québec, p. 41–59. In Lespérance, P. J. (ed.), IUGS, Subcommission on Silurian Stratigraphy, Ordovician–Silurian boundary working group Field meeting, Anticosti-Gaspé, Québec, 1981, II: Stratigraphy and Paleontology. Montréal.Google Scholar
Brongniart, A. 1822. Histoire naturelle des Crustacés fossiles, sous les rapports zoologiques et géologiques, savoir les trilobites par Alexandre Brongniart. Les Crustacés proprement dits par A.-G. Desmarest. Paris, 154 p.Google Scholar
Campbell, K. S. W. 1967. Trilobites of the Henryhouse Formation (Silurian) in Oklahoma. Oklahoma Geological Survey, Bulletin 115, 68 p.Google Scholar
Chatterton, B. D. E., Edgecombe, G. D., and Tuffnell, P. A. 1990. Extinction and migration in Silurian trilobites and conodonts of northwestern Canada. Journal of the Geological Society, London, 147:703–715.CrossRefGoogle Scholar
Chatterton, B. D. E., and Perry, D. G. 1983. Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. Palaeontographica Canadiana, 1, 126 p.Google Scholar
Chatterton, B. D. E., and Perry, D. G. 1984. Silurian cheirurid trilobites from the Mackenzie Mountains, northwestern Canada. Palaeontographica A, 184, 78 p.Google Scholar
Edgecombe, G. D. 1990. Encrinurine trilobites from the Silurian Brownsport Formation of Tennessee. Journal of Paleontology, 64:961–967.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1990a. Systematics of Encrinuroides and Curriella (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains. Canadian Journal of Earth Sciences, 27:820–833.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1990b. Mackenziurus, a new genus of the Silurian “Encrinurus” variolaris plexus (Trilobita). American Museum Novitates, 2968, 22 p.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1992. Early Silurian (Llandovery) encrinurine trilobites from the Mackenzie Mountains, Canada. Journal of Paleontology, 66:52–74.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1993. Silurian (Wenlock-Ludlow) encrinurine trilobites from the Mackenzie Mountains, Canada. Palaeontographica A, 229:75–112.Google Scholar
Edgecombe, G. D., and Ramsköld, L. 1992. The Silurian encrinurine trilobite Pacificurus: new species from North America. Journal of Paleontology, 66:255–262.Google Scholar
Emmrich, H. F. 1844. Zur naturgeschichte der Trilobiten. Realschul-Programm, Meiningen, 28 p.Google Scholar
Fletcher, H. O. 1950. Trilobites from the Silurian of New South Wales. Records of the Australian Museum, 22:220–233.Google Scholar
Foerste, A. F. 1888. Notes on Paleozoic fossils. Bulletin of the Scientific Laboratories of Denison University, 3:117–139.Google Scholar
Gass, K. C., Edgecombe, G. D., Ramsköld, L., Mikulic, D. G., and Watkins, R. 1992. Silurian Encrinurinae (Trilobita) from the central United States. Journal of Paleontology, 66:75–89.Google Scholar
Haswell, G. C. 1865. On the Silurian formation in the Pentland Hills. Willison P. Nimmo, Edinburgh, 48 p.Google Scholar
Holloway, D. J. 1980. Middle Silurian trilobites from Arkansas and Oklahoma, U.S.A. Palaeontographica A, 170, 85 p.Google Scholar
Holtedahl, O. 1914. On the fossil faunas from Per Schei's Series B in south western Ellesmereland. Report of the 2nd Norwegian Arctic Expedition in the ‘Fram’ 1898-1902, 32:1–48.Google Scholar
Howells, Y. 1982. Scottish Silurian trilobites. Palaeontographical Society Monograph, London, 561:1–85.Google Scholar
Jeppsson, L. 1987. Lithological and conodont distributional evidence for episodes of anomalous oceanic conditions during the Silurian, p. 129–145. In Aldridge, R. J. (ed.), Palaeobiology of Conodonts. Ellis Horwood Limited, Chichester.Google Scholar
Johnson, M. E., and McKerrow, W. S. 1991. Sea level and faunal changes during the latest Llandovery and earliest Ludlow (Silurian). Historical Biology, 5:153–169.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
Lamont, A. 1978. Pentlandian miscellany: Mollusca, Trilobita, etc. Scottish Journal of Science, 1:245–302.Google Scholar
Lane, P. D. 1988. Silurian trilobites from Peary Land, central North Greenland. Grønlands Geologiske Undersøgelse, Rapport 137:93–117.Google Scholar
Ludvigsen, R., and Tripp, R. P. 1990. Silurian trilobites from the Northern Yukon Territory. Royal Ontario Museum, Life Sciences Contributions, 153, 59 p.Google Scholar
Maksimova, Z. 1975. Trilobity, p. 119–133. In Menner, V. V. (ed.), Kharakteristika fauny pogranichnykh sloev Silura i Devona tsentral'nogo Kazakhstana. Nedra, Moscow.Google Scholar
Männil, R. M. 1958. Trilobity semeystv Cheiruridae i Encrinuridae iz Estonii. Eesti NSV Teaduste Akadeemia Geoloogia Instituudi Uurimused, 3:165–212.Google Scholar
Männil, R. M. 1977a. Novye enkrinuridy (Trilobita) Llandoveri Pribaltiki. Eesti NSV teaduste akadeemia toimetised, Keemia, Geoloogia, 26:46–56.CrossRefGoogle Scholar
Männil, R. M. 1977b. Distribution of trilobites in the Silurian of the East Baltic area. Eesti NSV teaduste akadeemia toimetised, Keemia, Geoloogia, 26:149–158.Google Scholar
McCracken, A. D. 1991. Silurian conodont biostratigraphy of the Canadian Cordillera with a description of new Llandovery species, p. 97–127. In Orchard, M. J. and McCracken, A. D. (eds.), Ordovician to Triassic conodont paleontology of the Canadian Cordillera. Geological Survey of Canada, Bulletin 417.Google Scholar
Melchin, M. J. 1989. Llandovery graptolite biostratigraphy and paleobiogeography, Cape Phillips Formation, Canadian Arctic Islands. Canadian Journal of Earth Sciences, 26:1726–1746.CrossRefGoogle Scholar
Mitchell, J. 1924. New trilobites from Bowning, with notes on Encrinurus and Cordania gardneri. Proceedings of the Linnaean Society of New South Wales, 49:46–54.Google Scholar
Over, D. J., and Chatterton, B. D. E. 1987. Silurian conodonts from the southern Mackenzie Mountains, Northwest Territories, Canada. Geologica et Palaeontologica, 21:1–49.Google Scholar
Přibyl, A., and Vaněk, J. 1962. Die Trilobiten-Fauna dem böhmischen Obersilur (Budnanium und Lochkovium) und ihre biostratigraphische Bedeutung. Sbomik Národniho Muzea v Praze (B), 18:25–46.Google Scholar
Ramsköld, L. 1986. Silurian encrinurid trilobites from Gotland and Dalarna, Sweden. Palaeontology, 29:527–575.Google Scholar
Ramsköld, L., and Edgecombe, G. D. 1994. A revision of the Silurian encrinurine trilobite Wallacia Lamont, 1978, with new species from Gotland and Canada. Paläontologische Zeitschrift, 68:89–115.Google Scholar
Reed, F. R. C. 1931. The lower Palaeozoic trilobites of Girvan. Supplement number 2. Palaeontographical Society Monograph, London, 83:1–30.CrossRefGoogle Scholar
Rosenstein, E. 1941. Die Encrinurus-Arten des Estlandischen Silurs. Annales Societatis rebus naturae investigandis in Universitate tartuensis constitutae, 47:49–77.Google Scholar
Salter, J.W. 1852. Geology, p. 217–233. In Sutherland, P. C., Journal of a voyage in Baffin's Bay and Barrow Straits, in the years 1850-1851, Vol. 2. London.Google Scholar
Snajdr, M. 1978. The Llandoverian trilobites from Hyskov (Barrandian area). Sborník Geologických Věd, Paleontologie, 21:4–47.Google Scholar
Strusz, D. L. 1980. The Encrinuridae and related trilobite families, with a description of Silurian species from southeastern Australia. Palaeontographica A, 168, 68 p.Google Scholar
Temple, J. T., and Tripp, R. P. 1979. An investigation of the Encrinurinae (Trilobita) by numerical taxonomic methods. Transactions of the Royal Society of Edinburgh, 70:223–250.Google Scholar
Thomas, A. T., and Narbonne, G. M. 1979. Silurian trilobites from Arctic Canada. Geological Magazine, 116:1–19.Google Scholar
Thomas, A. T., Owens, R. M., and Rushton, A. W. A. 1984. Trilobites in British stratigraphy. Geological Society of London, Special Report 16, 78 p.Google Scholar
Törnquist, S. L. 1884. Undersökningar öfver Siljansområdets trilobitfauna. Sveriges Geologiska Undersökning, Afhandlingar och Uppsatser, C, 66, 101 p.Google Scholar
Tripp, R. P. 1962. The Silurian trilobite Encrinurus punctatus (Wahlenberg) and allied species. Palaeontology, 5:460–477.Google Scholar
Tripp, R. P., Temple, J. T., and Gass, K. C. 1977. The Silurian trilobite Encrinurus variolaris and allied species, with notes on Frammia. Palaeontology, 20:847–867.Google Scholar
Twenhofel, W. H. 1928. Geology of Anticosti Island. Geological Survey of Canada, Memoir 154, 481 p.Google Scholar
Weller, S. 1907. The paleontology of the Niagaran Limestone in the Chicago area. The Trilobita. Bulletin of the Chicago Academy of Science, 4:163–281.Google Scholar
Whittard, W. F. 1938. The Upper Valentian trilobite fauna of Shropshire. Annals and Magazine of Natural History, 11:85–140.Google Scholar
Whittington, H. B., and Campbell, K. S. W. 1967. Silicified Silurian trilobites from Maine. Bulletin of the Museum of Comparative Zoology at Harvard College, 135:447–483.Google Scholar