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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Carabidae

            Tribe Pterostichini

 Pterostichus  (Euferonia) coracinus  (Newman)

Description and Taxonomy

Length 12.5-18 mm. This medium-sized black Pterostichus species is distinguished from similar species by the shiny but non iridescent elytra and by details of the  pronotum. The pronotum has its maximum width before the middle, and lacks sinuate margins, which are evenly arcuate to the posterior angles, in addition the basal impressions of the pronotum lack central tubercles. This species is also characterized by the setose 5th article of the tarsi and, normally, the presence of only two dorsal setae on each elytron (Lindroth 1966). The subgenus is precinctive to the Nearctic Region and contains six species. At least four of them inhabit the Smokies. The genus itself comprises about 180 species in the Nearctic Region, about twenty of them inhabiting GSMNP (Ball and Bousquet 2001).

Life History

The species is brachypterous and moderately hygrophilous, living in a wide range of habitats from open meadows to mixed hardwoods. In GSMNP adults can be found beneath rocks or logs predominantly in pine-oak forests in the vicinity of temporal water sources at low altitudes (350-700m).  Specimens from GSMNP were collected during June-September.

Distribution

The species is widely distributed through eastern North America as far south as Georgia and South Carolina and north to Quebec and New Brunswick (Bousquet and Larochelle 1993). The species is known from several localities in GSMNP and is probably widespread at low elevations.

Conservation Concerns

Not under threat.

Habitat of  Pterostichus  coracinus.

 

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). Photograph of habitat, Igor Sokolov, Louisiana State University.

References

Ball, G. E., and Y. Bousquet. 2001.  6. Carabidae  Latreille, 1810. In: American Beetles. Vol.1. CRC Press. 32-132 pp.

Bousquet, Y., and  A. Larochelle. 1993. Catalogue of the Geadephaga  (Col. Trachypachidae, Rhysodidae, Carabidae, incl. Cicindelini) of America north of Mexico. Entomological Society of Canada, Memoir No.167. 395 pp.

Lindroth, C.H. 1966. The ground-beetles (Carabidae, excl.Cicindelinae) of  Canada and Alaska. Part 4. Opuscula Entomologica. Supplementum No.29. 409-648pp.

Posted 22 Nov. 2006, I. M. Sokolov, Louisiana State Arthropod Museum.

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