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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Eucnemidae

            Tribe Melasini

 Microrhagus pectinatus 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 short posterior pronotal ridges and pectinate (males) or deeply serrate (females) antennae.

Life History

Specimens from GSMNP were collected with Malaise traps and at lights. Specimens were found from late April to early June at 625-890 m elevation.  The species is known to develop in several species of deciduous trees, i.e. Fagus, Platanus and Ulmus (Knull 1947, Muona 2000).

Distribution

Widespread throughout the most of North America, from British Columbia and Nova Scotia to Oregon and Georgia (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

Knull, J. N. 1947. new Elateridae with notes on Eucnemidae. Entomological News 57: 177-181.

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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