
Dorcus is a genus of the family Lucanidae of stag beetles. Of the 30-odd species, most occur in Asia and India; two are found in southern Europe, and two species are from North America. Previously, specimens with serriform teeth on the mandibles and sable pigment were called Serrognathus whereas specimens with but a singular or multiple bulky notc...
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http://en.wikipedia.org/wiki/Dorcus

Dorcus is the lesser stag beetle genus of beetles of the family Lucanidae. They grow to three centimetres in length, and the males have a particularly large, wide head.
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http://www.probertencyclopaedia.com/browse/BD.HTM
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