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The Columbian Timber Beetle, Corthylus columbianus (Coleoptera: Scolytidae): V. A Description of the Mycetangia1

Published online by Cambridge University Press:  31 May 2012

Ronald L. Giese
Ronald L. Giese
Affiliation:
Department of Entomology, Purdue University, West Lafayette, Indiana
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Abstract

The mycetangia of Corthylus columbianus Hopkins are described. These structures lay immediately below the integument of the pronotum, one in each ventrolateral region. Each mycetangium is a coiled tube 4.69 ± 0.35 mm. in length, cream colored, opening into the anterior coxal cavity. Mycetangia occur only in the male beetle and provide the overwintering storage site and transmission mechanism for associated microorganisms. Smears and cultures of the mycetangia were positive for ascospores and vegetative cells of a yeast, Pichia sp., which coincides with the microsymbiote dominant in developmental chambers of the larvae.

Type
Articles
Information
The Canadian Entomologist , Volume 99 , Issue 1 , January 1967 , pp. 54 - 58
Copyright
Copyright © Entomological Society of Canada 1967

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