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Coleoptera of Great Smoky Mountains National Park Species Pages

Family Carabidae

            Tribe Platynini

 Platynus  (s.str.) tenuicollis  (LeConte)

Description and Taxonomy

Length 9-13mm. This black Platynus with brown, diaphanous lateral margins of the pronotum is distinctive by the asymmetrical, strongly keeled 4th segments of the meso- and metatarsi (Lindroth 1966). This species is also characterised by a unicolorous frons and the absence of any dorsoapical setae on the metafemura (Liebherr and Will 1996). In the Nearctic Region, the genus is represented by 22 species, six of them inhabiting the Smokies (Ball and Bousquet 2001).

Life History

The species is hygrophilous and occurs along many streams in GSMNP. Adults can be found beneath rocks and among gravel along banks of creeks and rivers in shady areas at middle altitudes (500-1500m).  Specimens from GSMNP were collected during March-August. The species is one of  a few Platynus species that may be taken at ultraviolet and mercury vapor lights.


Widely distributed through eastern North America as far south as Florida and Louisiana and north to Quebec and New Brunswick (Bousquet and Larochelle 1993). The species is known from many localities in GSMNP.  At  Porters Creek the species was taken in company with the ground beetles Nebria appalachia and Bembidion simplex.

Conservation Concerns

Not under threat.

Habitat of  Platynus tenuicollis.



Locality records in GSMNP.


Development of these pages was supported by grants from Discover Life in America and the National Science Foundation (DEB-0516311). Photograph of habitat courtesy Olexandre Rusin, 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.

Liebherr, J.K. and K.W. Will. 1996. New North American Platynus Bonelli (Coleoptera: Carabidae), a key to species North of Mexico, and notes on species from southwestern United States. Coleopt.Bull. Vol.50. No 4: 301-320.

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

Posted 14 Aug. 2006, I. M. Sokolov, Louisiana State Arthropod Museum.

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