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Upper Steptoean (Upper Cambrian) Trilobites from the Mckay Group of Southeastern British Columbia, Canada

Published online by Cambridge University Press:  11 August 2017

Brian D. E. Chatterton  and
Rolf Ludvigsen
Brian D. E. Chatterton
Affiliation:
Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
Rolf Ludvigsen
Affiliation:
Denman Institute of Research on Trilobites, 3390 Denman Road, Denman Island, British Columbia VOR 1T0, Canada
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Abstract

An abundant and well preserved trilobite fauna is described from Upper Cambrian calcareous mudstones of the McKay Group, near Cranbrook in southeastern British Columbia. The trilobites are mostly articulated, consisting of similar numbers of molts and carcasses. They are representative of a new deep water biofacies, the Wujiajiania Biofacies, and a new Wujiajiania sutherlandi Fauna of late Steptoean age. The trilobites were collected from a narrow interval (<20 m thick) of richly fossiliferous strata, in a thick sequence of unfossiliferous to sparsely fossiliferous strata of similar lithology. The fauna includes fourteen species, six of which are new: Aciculolenus palmeri, Burnetiella leechi, Hedinaspis canadensis, Labiostria westropi, Pterocephalia norfordi, and Wujiajiania sutherlandi.

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