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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Eucnemidae

            Tribe Macraulacini

 Onichodon orchesides Newman

Description and Taxonomy

Length 8-17mm. The genus may be diagnosed by a combination of the following characters: deep lateral antennal grooves, toothed claws, simple epipleura, and narrow 4th tarsomeres in comparison with the 5th ones.  In the Nearctic Region, the genus is represented by  five species, all of them known in the East (Muona 2000). Only one species is known from GSMNP.

Life History

A few specimens known from the GSMNP were collected with Malaise traps. They were found from late April to mid July at 625-1500 m elevation.  The life history data are limited due to widespread problems with correct species identifications within the genus. Reliable host records include Acer and Populus (Muona 2000).


Widespread and relatively common eastern North American eucnemid known from Minnesota and Quebec to Oklahoma, Mississippi and  North Carolina  (Muona 2000).

Conservation Concerns

Not under threat.


Locality records in GSMNP.


Development of these pages was supported by grants from Discover Life in America and the National Science Foundation (DEB-0516311). .


Muona, J. 2001.  A revision of North American Eucnemidae. Acta Zoologica Fennica 212: 1-106.


Posted 5 Feb. 2007, A. K. Tishechkin, Louisiana State Arthropod Museum.

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