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Late Ordovician and Silurian lichid trilobites from northwestern Canada: Eight new species from subfamilies Lichinae, Platylichinae, and Trochurinae

Published online by Cambridge University Press:  20 May 2016

Margaret J. Campbell  and
Brian D. E. Chatterton
Margaret J. Campbell
Affiliation:
Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
Brian D. E. Chatterton
Affiliation:
Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
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Abstract

Eight new species of lichid trilobites representing five genera in three subfamilies, from the Avalanche Lake area of the southern Mackenzie Mountains, Northwest Territories, Canada, are described. The subfamily Lichinae is represented by Dicranopeltis n. sp. and the subfamily Platylichinae by the early Llandovery Platylichas infimus n. sp. The subfamily Trochurinae is represented by six species belonging to four genera. These are Acanthopyge (Lobopyge) sp. (Wenlock), the earliest known species of the genus Acanthopyge and subgenus Acanthopyge (Lobopyge), A. (L.) pristina n. sp. from the Glyptograptus persculptus Zone in the latest Ordovician, Dicranogmus lepidus n. sp., D. wilsoni n. sp. (both Wenlock), Dicranogmus n. sp. (Llandovery), and Radiolichas guttatus n. sp. (Wenlock).

Type
Research Article
Information
Journal of Paleontology , Volume 80 , Issue 3 , May 2006 , pp. 514 - 528
Copyright
Copyright © The Paleontological Society 

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References

Adrain, J. M. 2003. Validity and comparison of the Silurian trilobite genera Borealarges and Dicranogmus with new species from the Canadian Arctic. Canadian Journal of Earth Sciences, 40:749–763.Google Scholar
Adrain, J. M., and Chatterton, B. D. E. 1994. The aulacopleurid trilobite Otarion with new species for the Silurian of northwestern Canada. Journal of Paleontology, 64:305–323.Google Scholar
Adrain, J. M., and Chatterton, B. D. E. 1995a. The otarionine trilobites Harpidella and Maurotarion, with species from northwestern Canada. 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.Google Scholar
Adrain, J. M., and Chatterton, B. D. E. 1996. The otarionine trilobite Cyphaspis with new species from the Silurian of northwestern Canada. Journal of Paleontology, 70:100–110.Google Scholar
Adrain, J. M., and Ramsköld, L. 1996. The lichid trilobite Radiolichas in the Silurian of Arctic Canada and Gotland, Sweden. Geological Magazine, 133:147–158.Google Scholar
Angelin, N. P. 1854. Palaeontologia Scandinavica. Pars I. Crustacea Formationis Transitionis. Fasc. II. Lipsiae (Weigel, T. O.), Lundae, p. 21–92.Google Scholar
Barrande, J. 1846. Notice Préliminaire sur le Systême Silurien et les Trilobites de Bohême. Leipzig, 97 p.Google Scholar
Barrande, J. 1872. Systême Silurien du Centre de la Bohême. lère partie. Recherches paléontologiques. Vol. 1. (Trilobites, Crustacés divers et poissons) (suppl.). Prague, 647 p.Google Scholar
Beyrich, F. 1845. Über Einige Böhmische Trilobiten. Berlin, 47 p.Google Scholar
Bolton, T. E., and Ross, J. R. P. 1985. The cryptostomate bryozoan Sceptropora (Rgabdomesina, Arthrostylidae) from Upper Ordovician rocks of southern Mackenzie Mountains, District of Mackenzie. Current Research, Pt. A. Geological Survey of Canada, 85-1A:29–45.Google Scholar
Caldwell, M. W., and Chatterton, B. D. E. 1995. Phylogenetic analysis of some Silurian rostroconchs (Mollusca) from northeastern Canada. Canadian Journal of Earth Sciences, 32:806–827.Google Scholar
Chatterton, B. D. E., and Perry, D. G. 1983. Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. Palaeontographica Canadiana, 1, 1,127 p.Google Scholar
Chatterton, B. D. E., and Perry, D. G. 1984. Silurian cheirurid trilobites from the Mackenzie Mountains, northwestern Canada. Palaeontographica A, 184:1–78.Google Scholar
Chatterton, B. D. E., Edgecombe, G. D., and Tuffnell, P. A. 1990. Extinction and migration in Silurian trilobites and conodonts in northwestern Canada. Journal of the Geological Society, London, 147:703–715.Google Scholar
Copeland, M. J. 1989. Silicified Upper Ordovician–Lower Silurian ostracodes from the Avalanche Lake Area, southwestern District of Mackenzie. Geological Survey of Canada Bulletin, 341:1–100.Google Scholar
Curtis, N. J., and Lane, P. D. 1998. The Llandovery trilobites of England and Wales, Pt. 2. Monograph of the Palaeontographical Society, 152(608):51–101.Google Scholar
Ebach, M. C., and Ahyong, S. T. 2001. Phylogeny of the trilobite subgenus Acanthopyge (Lobopyge). Cladistics, 17:1–10.Google Scholar
Edgecombe, G. D. 1994. New Lower Silurian (Llandovery) encrinurine trilobites from the Mackenzie Mountains, Canada. Journal of Paleontology, 68:824–837.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1990a. Mackenziurus, a new genus of the Silurian “Encrinurus” variolis plelxus (Trilobita). American Museum Novitates, 2968, 22 p.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1990b. Systematics of Encrinuroides and Curriella, with a new Early Silurian encrinurine from the Mackenzie Mountains. Canadian Journal of Earth Sciences, 27:820–823.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, and related species. 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
Fletcher, T. W. 1850. Observations on the Dudley trilobites. Quarterly Journal of the Geological Society of London, 6:235–239.Google Scholar
Gabrielse, H., Blusson, S. L., and Roddick, J. A. 1973a. Geology of Flat River, Glacier Lake and Wrigley Lake map-areas, District of Mackenzie and Yukon Territory. Pt. 1: General geology, structural geology, and economic geology. Geological Survey of Canada Memoirs, 366:1–153.Google Scholar
Gabrielse, H., Blusson, S. L., and Roddick, J. A. 1973b. Geology of Flat River, Glacier Lake, and Wrigley Lake map-areas, District of Mackenzie and Yukon Territory. Pt. 2: Measured sections. Geological Survey of Canada Bulletin, 366:1–268.Google Scholar
Goodfellow, W. D., and Jonasson, I. R. 1984. Ocean stagnation and ventilation defined by δ34S secular trends in pyrite and barite, Selwyn Basin, northern Yukon Territory, Canada. Geology, 12:583–586.Google Scholar
Gürich, G. 1901. Über eine neue Lichas-Art aus dem Devon von Neu-Süd-Wales und über die Gattung Lichas überhaupt. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, 14:519–539.Google Scholar
Hawle, I., and Corda, A. J. C. 1847. Prodrom einer Monographie der Böhmischen Trilobiten. Prague, 176 p.Google Scholar
Holloway, D. J., and Thomas, A. T. 2002. Hoplolichoides, Allolichas, Autoloxolichas and Akantharges, and the classification of lichid trilobites. Geobios, 35:111–125.Google Scholar
Holzapfel, E. 1895. Das obere Mitteldevon (Schichten mit Stringocephalus burtini und Maeneceras terebratum) in Rheinischen Gebirge. Abhandlungen der Königlichen Preussischen geologischen Landesanstalt, 16:1–459.Google Scholar
Jin, J., and Chatterton, B. D. E. 1997. Latest Ordovician–Silurian articulate brachiopods and biostratigraphy of the Avalanche Lake area, southwestern District of Mackenzie, Canada. Palaeontographica Canadiana, 13:1–167.Google Scholar
Johnston, D. I., and Chatterton, B. D. E. 1983. Some silicified Middle Silurian rostrochonchs (Mollusca) from the Mackenzie Mountains, N.W.T., Canada. Canadian Journal of Earth Sciences, 20:844–858.Google Scholar
Kaesler, R. L. (ed.). Treatise on Invertebrate Paleontology. Pt. O. Arthopoda 1. Trilobita (revised). Vol. 1: Introduction, Order Agnostida, Order Redlichiida. Geological Society of America and University of Kansas, Lawrence, 530 p.Google Scholar
Lane, P. D. 1979. Llandovery trilobites from Washington Land, North Greenland. Grønlands Geologiske Undersøgelse Bulletin, 131:5–50.Google Scholar
Lane, P. D., and Owens, R. M. 1982. Silurian trilobites from Kap Schuchert, Washington land, western North Greenland. Grønlands Geologiske Undersøgelse Rapport, 108:41–69.Google Scholar
Lenz, A. C. 1977. Llandoverian and Wenlockian brachiopods from the Canadian Cordillera. Canadian Journal of Earth Sciences, 14:1521–1554.Google Scholar
Ludvigsen, R. 1978. Middle Ordovician trilobite biofacies, southern Mackenzie Mountains, p. 1–137. In Stelck, C. R. and Chatterton, B. D. E. (eds.), Western and Arctic Canadian Biostratigraphy. Geological Association of Canada Special Paper, 18, 602 p. Google Scholar
Moore, R. C. (ed.). 1959. Treatise on Invertebrate Paleontology. Pt. O (1) (Arthropoda). Geological Society and University of Kansas Press, Lawrence, 560 p.Google Scholar
Morrow, D. W. 1991. The Silurian–Devonian sequence in the northern part of the Mackenzie Shelf, Northwest Territories. Geological Survey of Canada Bulletin, 413:1–121.Google Scholar
Nieszkowski, J. 1857. Versuch einer monographie der in den silurischen Schichten der Ostee-provinzen vorkommenden Trilobiten. Archiv fuer die Naturkunde Liv-, Est, und Kurlands, 1:517–626.Google Scholar
Nowlan, G. S., Mccracken, A. D., and Chatterton, B. D. E. 1988. Conodonts from Ordovician–Silurian Boundary strata, Whittaker Formation, Mackenzie Mountains, Northwest Territories. Geological Survey of Canada Bulletin, 373:1–99.Google Scholar
Over, D. J. 1988. Lingulid brachiopods and Lingulichnus from Silurian shelf-slope carbonate sequence, Delorme Group, Mackenzie Mountains, Northwest Territories. Canadian Journal of Earth Sciences, 25:465–471.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
Perry, D. G., and Chatterton, B. D. E. 1977. Silurian (Wenlockian) trilobites from Baillie-Hamilton Island, Canadian Arctic. Canadian Journal of Earth Sciences, 14:285–317.Google Scholar
Phleger, F. B. Jr. 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. Paläeontologische Zeitschrift, 26:141–174.Google Scholar
Reed, F. R. C. 1902. Notes on the genus Lichas . Quarterly Journal of the Geological Society of London, 58:59–82.Google Scholar
Reed, F. R. C. 1903. Woodwardian Museum notes: On some Wenlock species of Lichas . Geological Magazine, 50:2–12.Google Scholar
Reed, F. R. C. 1923. The subgenera of Lichas . Geological Magazine, 60:454–462.Google Scholar
Rigby, J. K., and Chatterton, B. D. E. 1994. New Middle Silurian hexactinellid sponges from the Mackenzie Mountains, Northwest Territories, Canada. Journal of Paleontology, 68:218–223.Google Scholar
Rigby, J. K., and Chatterton, B. D. E. 1999. Silurian (Wenlock) demosponges from the Avalanche Lake area of the Mackenzie Mountains, southwestern district of Mackenzie, Northwest Territories, Canada. Palaeontographica Canadiana, 16:1–43.Google Scholar
Rudkin, D. M., Tripp, R. P., and Ludvigsen, R. 1994. The Ordovician trilobite Hemiarges (Lichidae: Trochurinae) from North America and Greenland, p. 289–306. In Landing, E. (ed.), Studies in Stratigraphy and Paleontology in Honor of Donald W. Fisher. New York State Museum Bulletin, 481.Google Scholar
Schmidt, F. 1885. Revision der ostbaltischen silurischen Trilobiten. Abtheilung 2: Acidaspiden und Lichiden. Mémoires de l'Academie Impériale des Sciences de St.-Petersbourg, 7, 33, 127 p.Google Scholar
Siveter, D., and Chatterton, B. D. E. 1996. Silicified calymenid trilobites from the Silurian of the Mackenzie Mountains, northwest Canada. Palaeontographica A, 239:43–60.Google Scholar
Soehn, K. L., and Wilson, M. V. H. 1990. Discovery of complete Silurian fish. Naturwissenschaften, 77:328–330.Google Scholar
Thomas, A. T. 1981. British Wenlock trilobites, Pt. 2. Monograph of the Palaeontological Society, 132:57–99.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
Tripp, R. P. 1957. The classification and evolution of the superfamily Lichacea (Trilobita). Geological Magazine, 94:104–122.Google Scholar
Wang, K., Chatterton, B. D. E., Attrep, J. M., and Orth, C. J. 1993. Late Ordovician mass extinction in the Selwyn Basin, northwestern Canada: geochemical, sedimentological and paleontological evidence. Canadian Journal of Earth Sciences, 30:1870–1880.Google Scholar
Whittington, H. B., and Kelly, S. R. A. 1997. Morphological terms applied to Trilobita, p. 313–329. In Kaesler, R. L. (ed.), Treatise on Invertebrate Paleontology. Pt. O. Arthopoda 1. Trilobita (revised). Vol. 1. Introduction, Order Agnostida, Order Redlichiida. Geological Society of America and University of Kansas, Lawrence.Google Scholar
Wu, H. 1977. Comments on new genera and species of Silurian–Devonian trilobites in southwest China and their significance. Acta Palaeontologica Sinica, 16:112–117.Google Scholar