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Journal of Paleontology

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CONODONTS FROM A PLATFORM-TO-BASIN TRANSECT, LOWER ORDOVICIAN TO LOWER SILURIAN, NORTHEASTERN BRITISH COLUMBIA, CANADA¹

¹ School of Earth and Ocean Sciences, University of Victoria, P.O. Box 3055, Victoria, B.C. V8W 3P6, Canada, <leanne{at}uvic.ca>,<crbarnes{at}uvic.ca>

The conodont fauna from nine sections across a platform-to-basin transect in northeastern British Columbia includes species of Early Ordovician (Tremadocian) to Early Silurian (Llandovery) age. A collection of 9,110 conodont elements was recovered from 205 samples taken from nine stratigraphic sections that preserve the platform succession of the Kechika, Skoki, Beaverfoot, McCusker and Nonda Formations and their off-shelf equivalents, the Ospika, Robb, Kenny and Laurier Formations of the Road River Group. The fauna is assigned to 106 species representing 67 genera; the Ordovician species are representative of two faunal realms. One new genus, left in open nomenclature, is described. Five new species include Drepanoistodus latus and four new species left in open nomenclature assigned to the following genera: Walliserodus, Multioistodus?, Pseudooneotodus, and Belodina. The Midcontinent Realm zones recognized include, in ascending order, the Acodus kechikaensis, Oepikodus communis, Jumudontus gananda, Tripodus laevis to Plectodina aculeata zones, Phragmodus undatus and Gamachignathus ensifer? zones. Zonal species of the Atlantic Realm are Microzarkodina flabellum, Eoplacognathus suecicus, Baltoniodus variabilis, Pygodus anserinus, and Amorphognathus tvaerensis. The Silurian fauna, of lower diversity than the Ordovician fauna, is representative of the Distomodus staurognathoides and Pterospathodus amorphognathoides zones.

This article has been cited by other articles:

				S. Zhang and C. R. Barnes Conodont bio-events, cladistics and response to glacio-eustasy, Ordovician-Silurian boundary through Llandovery, Anticosti Basin, Quebec Geological Society, London, Special Publications, January 1, 2004; 230(1): 73 - 104. [Abstract] [PDF]

				CONODONT FAUNA AND BIOSTRATIGRAPHY OF THE OUTRAM, SKOKI, AND OWEN CREEK FORMATIONS (LOWER TO MIDDLE ORDOVICIAN), WILCOX PASS, ALBERTA, CANADA Journal of Paleontology, July 1, 2003; 77(5): 958 - 976.