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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Carabidae

            Tribe Patrobini

 Patrobus  (Neopatrobus) longicornis  (Say)

Description and Taxonomy

Length 9.2-14.8mm. Patrobus is the only representative of the tribe in the southern Appalachians. The genus can be distinguished from other carabid genera in GSMNP by the transverse punctate sulcus on the vertex behind the eyes. From other species within the genus this species can be easily separated by the deep anterior impression of the pronotum (Lindroth 1961).  In the Nearctic Region, the genus is represented by six species. Only one of them inhabits the Smokies (Ball and Bousquet 2001).

Life History

The species is hygrophilous and associated with a wide range of wet habitats. In the Park adults can be found beneath rocks along the banks of creeks and rivers or near ponds in shady areas at low altitudes (300-600m).  Specimens from GSMNP were collected during June-September. The species is wing-dimorphic and may be taken at artificial lights (Larochelle and Lariviere 2003).


Widely distributed throughout North America as far south as Florida and Arizona and north to Newfoundland and British Columbia (Bousquet and Larochelle 1993). The species is known from only a few localities in GSMNP, but probably is distributed wider and inhabits valleys of most rivers at low altitudes.  At  Little River the species was taken in company with the ground beetles Nebria pallipes.

Conservation Concerns

Not under threat.

Habitat of  Patrobus longicornis.

Locality records in GSMNP.


Development of these pages was supported by grants from Discover Life in America and the National Science Foundation (DEB-0516311). Habitat photograph, Igor M. Sokolov, Louisiana State University.


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.

Larochelle A., and Lariviere M.-C. 2003. A natural history of the ground-beetles (Coleoptera: Carabidae) of America north of Mexico. Pensoft. Series Faunistica, No 27. 583pp.

Lindroth, C. H. 1961. The ground-beetles (Carabidae, excl.Cicindelinae) of  Canada and Alaska. Part 2. Opuscula Entomologica. Supplementum No.20. 1-200pp.

 Posted 5 Feb. 2007, I. M. Sokolov, Louisiana State Arthropod Museum.

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