Back to Coleoptera Checklist

Back to Species Webpage List

Coleoptera of Great Smoky Mountains National Park Species Pages

Family Eucnemidae

            Tribe Melasini

 Isorhipis ruficornis (Say)

Description and Taxonomy

Length 5-10mm. The genus may be diagnosed by a combination of the following characters: lack of antennal grooves on hypomera, pectinate anttenae in males and slender tibiae.  In the Nearctic Region, the genus is represented by  four species, three of them known in the East (Muona 2000). Two species are found in GSMNP, both with bicolor, yellowish-brown and black elytra. Isoriphis ruficornis is distinguished by poorly developed medial keel of 7th tergite and pronotal median grrove extending into anterior half.

Life History

Specimens from GSMNP were collected using Malaise traps and by unspecified hand collecting. They were taken along Snakeden Ridge in early April to early June at 725-980 m elevation. The species is known to develop in various species of deciduous trees, i.e. Acer, Betula, Cornus, Fagus and Platanus, mainly in decaying soft wood (Knull 1947; Muona 2000).


Widespread, but relatively rare throughout eastern North America, south to Arkansas, Georgia  and  Texas and north to Quebec (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). .


Knull, J.M. 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.

Back to Coleoptera Checklist

Back to Species Webpage List