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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Histeridae

            Tribe Histerini

 Atholus relictus (Marseul)

Description and Taxonomy

Length 4.2-4.9 mm. The genus belongs to the tribe Histerini, which is characterized by the presence of an 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, mesosternum without median projection and prosternal base without emargination (Kryzhanovskij & Reichardt 1976, Kovarik & Caterino 2000).  Five or six genera of Histerini are known in N America (Kovarik & Caterino 2000, Bousquet & Lapalante 2006), and three are present in GSMNP. Atholus may be diagnosed by the slightly convex outline of the anterior margin of the mesosternum, which is at least slightly concave in species of the other two histerine genera. Fifteen described species in the genus occur in N America, three of which are found in GSMNP. This species may be diagnosed by the anteriorly abbreviated 5th dorsal and sutural striae. Its identification is tentative and is based on its external similarity to the Palearctic species A. corvinus (Germar), which was reported for North America in the 19th century. That record was subsequently attributed to A. relictus (see synonymic notes in Mazur 1997).

Life History

The life history of the species is unknown, and it has been collected only by passive methods (Tishechkin, unpublished). In GSMNP, the species was collected once in a flight intercept trap at 625 m of elevation.

Distribution

Known from two localities outside GSMNP in Louisiana and South Carolina (Mazur 1997; Tishechkin, unpublished).

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

Bousquet, Y. and S. Laplante. 2006.  Coleoptera Histeridae. The insects and arachnids of Canada. Part 24. NRC Research press, Ottawa. 485 pp.

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.

 

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

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