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Wenlock (Silurian) graptolites, Cape Phillips Formation, Canadian Arctic Islands

Published online by Cambridge University Press:  03 November 2011

A. C. Lenz  and
M. J. Melchin
A. C. Lenz
Affiliation:
A. C. Lenz, Department of Geology, University of Western Ontario, London,Canada N6A 5B7
M. J. Melchin
Affiliation:
M. J. Melchin, Department of Earth Sciences, University of Waterloo, Waterloo,Canada N2L3G1
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Abstract

Twenty six of the more important species of monograptids (s.l.), retiolitids and Cyrtograptus (from a total fauna of 52 species) are described from Wenlock strata of the Cape Phillips Formation, Canadian Arctic Archipelago. Of this fauna, eight new species or subspecies, Monograptus firmus festinolatus, M. instrenuus, M. opimus, M. testis incomptus, Cyrtograptus falcatus, C. hamatus brevis, C. kolobus and C. pseudomancki, are described and illustrated.

Wenlock biostratigraphic zones comprise the Cyrtograptus centrifugus-C. insectus Zone (earliest Wenlock), M. instrenuus-C. kolobus Zone, tentatively divisible into lower and upper subzones, C. perneri-M. opimus Zone possibly divisible into lower and upper subzones, C. lundgreni-M. testis Zone divisible into a lower M. testis incomptus Subzone and an upper M. testis testis Subzone, and the Pristiograptus ludensis Zone (latest Wenlock).

Keywords

taxonomymonograptidsretiolitidsCyrtograptusbiostratigraphyWenlock
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 82 , Issue 3 , 1991 , pp. 211 - 237
Copyright
Copyright © Royal Society of Edinburgh 1991

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