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Novel method for determining sex of live adult Laricobius nigrinus (Coleoptera: Derodontidae)

Published online by Cambridge University Press:  31 March 2014

William P. Shepherd ,
Michael E. Montgomery ,
Brian T. Sullivan  and
Albert E. Mayfield III
William P. Shepherd*
Affiliation:
United States Department of Agriculture Forest Service, Southern Research Station, 2500 Shreveport Hwy, Pineville, Louisiana 71360, United States of America
Michael E. Montgomery
Affiliation:
United States Department of Agriculture Forest Service, Northern Research Station, 51 Mill Pond Rd, Hamden, Connecticut 06514, United States of America
Brian T. Sullivan
Affiliation:
United States Department of Agriculture Forest Service, Southern Research Station, 2500 Shreveport Hwy, Pineville, Louisiana 71360, United States of America
Albert E. Mayfield III
Affiliation:
United States Department of Agriculture Forest Service, Southern Research Station, 200 WT Weaver Blvd, Asheville, North Carolina 28804, United States of America
*
1Corresponding author (e-mail: williamshepherd@fs.fed.us).
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Abstract

A method for determining the sex of live adult Laricobius nigrinus Fender (Coleoptera: Derodontidae) is described. Beetles were briefly chilled and positioned ventral-side-up under a dissecting microscope. Two forceps with blunted ends were used to gently brace the beetle and press on the centre of the abdomen to extrude its terminal segments. Male beetles were distinguished by a sclerotised, reticulate ninth abdominal sternite. In females, the distinct ovipositor (tergite, valvifers (ninth sternite), and laterotergites of the ninth abdominal segment) was visible. The procedure was rapid and harmed only a small number of individuals (fewer than 5%).

Type
Techniques – NOTE
Information
The Canadian Entomologist , Volume 146 , Issue 6 , December 2014 , pp. 693 - 696
Copyright
© Entomological Society of Canada 2014. This is a work of the U.S. Government and is not subject to copyright protection in the United States 

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Footnotes

Subject editor: John Sweeney

References

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