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New Lower Cambrian olenelloid trilobite genera Cirquella and Geraldinella from southwestern Canada

Published online by Cambridge University Press:  20 May 2016

W. H. Fritz
W. H. Fritz*
Affiliation:
Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada
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Abstract

The genus Cirquella is erected for small, smooth nevadiid trilobites that lack genal spines. The type species, C. nummularia, is associated with taxa in the Dogtooth Mountains, British Columbia, that belong to the Nevadella Zone. A second species, C. espinata, is described from the southern Canadian Rocky Mountains, where it is associated with the new archaeaspid genus Geraldinella. Strata in the latter locality can be physically correlated to documented strata of the Nevadella Zone. The same zone in Nevada contains C. nummularia?.

Type
Research Article
Information
Journal of Paleontology , Volume 67 , Issue 5 , September 1993 , pp. 856 - 868
Copyright
Copyright © The Paleontological Society 

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