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The Ordovician trilobite Calyptaulax brongniartii (Portlock)

Published online by Cambridge University Press:  03 November 2011

E. N. K. Clarkson  and
R. P. Tripp
E. N. K. Clarkson
Affiliation:
Grant Institute of Geology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JW, Scotland
R. P. Tripp
Affiliation:
British Musuem (Natural History), Cromwell Road, London SW7 5BD, England
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Abstract

Calyptaulax brongniartii (Portlock) from the Caradocian Bardahessiagh Formation, Pomeroy, Northern Ireland is redescribed. Equivalent material from Scottish horizons (Balclatchie and Ardwell groups) is regarded as belonging to separate populations. Campbell's system of notation is used to describe variation in the arrangement and number of lenses in the eye. The most closely related species is C. strasburgensis (Ulrich & Delo) from the Edinburg Limestone of Virginia, U.S.A.

Keywords

CaradociandistributioneyesNorthern IrelandPhacopinaredescriptionScotland.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 72 , Issue 4 , 1982 , pp. 287 - 294
Copyright
Copyright © Royal Society of Edinburgh 1982

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