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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Histeridae

            Tribe Exosternini

 Baconia aeneomicans (Horn)

Description and Taxonomy

Length 2.8-3.0 mm. The genus belongs to the tribe Exosternini, which is characterized by the presence of expanded prosternal lobe, free labrum, antennal cavities situated under anterior angles of pronotum, dentate protibiae with straight protarsal furrow, antennal club with annuli not V-shaped and mesosternum with median projection corresponding to an emargination at the prosternal base (Kryzhanovskij & Reichardt 1976, Kovarik & Caterino 2000). Among the genera of Exosternini, Baconia may be diagnosed by blue metallic luster, parallel or divergent carinal striae and lack of annuli on the antennal club.  This is the only species known from GSMNP, differing from the other eastern species of the genus by the much smaller and weakly flattened body.

Life History

This life history of the species is poorly known. Most of the known specimens are collected by passive collecting methods. Records indicate an association with rather open habitats, where it lives under loose bark of dead deciduous trees, oaks in particular (Kovarik & Caterino 2000). In GSMNP, the species was collected once, by flight intercept trapping  at 1510 m elevation.


 South-eastern N America, from Maryland to Florida and Texas (Peck & Thomas 1998, Tishechkin, unpublished).

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).


Kovarik, P.W. and M. S. Caterino.  2000. Histeridae. Pp. 212-227 in: Arnett, R. H. and M. C. Thomas (eds.) American beetles. Vol. 1. CRC Press, Boca Raton  - London - New York - Washington.

Kryzhanovskij, O. L. and A. N. Reichardt. 1976. Histeroidea. fauna of the USSR. Vol. V (4). Nauka: Moscow - Leneingrad. 433 pp.

Peck, S. B and M. C. Thomas. 1998. A distributional checklist of the beetles (Coleoptera) of Florida. Arthropods of Florida. Volume 16. Florida Dept. of Agriculture and Consumer Services, Gainesville. 180 pp.


 Posted 13 August 2007, A. K. Tishechkin, Louisiana State Arthropod Museum.

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