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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Eucnemidae

            Tribe Melasini

 Microrhagus subsinuatus LeConte

Description and Taxonomy

Length 2.5-4.2mm. In addition to tribal characters (prominent lateral pronotal ridges, notosternal antennal grooves, deep pits near procoxae) the genus may be diagnosed by simple elytral apices, long 3rd antennomere, narrowly separated antennal sockets and narrowing metacoxal plates.  In the Nearctic Region, the genus is represented by four species, all of them known in the east (Muona 2000) and in GSMNP. This species may be distinguished from its congeners by long anterior pronotal ridges and feebly serrate (in both sexes) antennae.

Life History

Specimens from GSMNP were collected using Malaise and Lindgren traps, at lights and by unspecified hand collecting. This is the most abundant and widespread eucnemid in the Smokies. Specimens were found from late May to late August at 420-1370 m elevation.  The species is known to develop in species of two genera of deciduous trees, i.e. Fagus and Alnus ( Muona 2000).

Distribution

Widespread and fairly common eastern and central North American species, known from Colorado and Quebec to Ohio and Florida (Muona 2000).

Conservation Concerns

Not under threat.

 

Locality records in GSMNP.

Acknowledgements

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

References

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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