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The Fossil Coleoptera of the Two Creeks forest Bed, Wisconsin

Published online by Cambridge University Press:  20 January 2017

Alan V. Morgan  and
Anne Morgan
Alan V. Morgan
Affiliation:
Department of Earth Sciences, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
Anne Morgan
Affiliation:
Department of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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Abstract

A 21-kg sample of plant detritus from the Two Creeks forest bed at the junction of Kewaunee and Manitowoc Counties, Wisconsin, has produced a small, but well-preserved fauna of Coleoptera, Hymenoptera, and Diptera. Among the Coleoptera the majority of Carabidae (ground beetles) indicate moderately moist to fairly dry, open ground conditions with a sparsely vegetated substrate. Another significant beetle group is represented by the Scolytidae (bark beetles) nearly all of which inhabit spruce. The restricted number of Coleoptera species (21) is believed to represent an in situ assemblage and is part of about 50 taxa. Most of the Coleoptera identified to the species level have a transcontinental distribution, with the exception of two carabids which are extreme western forms, and nearly all reside within the boreal forest. The beetles indicate that the mean July temperature at Two Creeks approximately 11,850 yr B.P. was 14° to 16°C.

Type
Research Article
Information
Quaternary Research , Volume 12 , Issue 2 , September 1979 , pp. 226 - 240
Copyright
University of Washington

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