[Taxacom] Geodorcus sororum

Stephen Thorpe stephen_thorpe at yahoo.co.nz
Sat Jul 3 22:41:04 CDT 2010


Well, allometry and associated polymorphism are rife in this group

>Is the size of the mandibles one of the characters which distinguishes Geodorcus sororum?

Yes, along with the gross shape of the mandibles, and other characters ... but it doesn't matter how the speciation came about. It may have come about as result of normal allometric polymorphism, but it has allegedly "crossed the line" (of reproductive isolation) in this case ...


 



________________________________
From: Kenneth Kinman <kennethkinman at webtv.net>
To: taxacom at mailman.nhm.ku.edu
Sent: Sun, 4 July, 2010 3:18:30 PM
Subject: [Taxacom] Geodorcus sororum

Hi Stephen,
        Actually there has apparently recently been male trimorphism
discovered in stag beetles, especially affecting the size of their
mandibles.  Is the size of the mandibles one of the characters which
distinguishes Geodorcus sororum?
      Anyway, here is a link to one news story about this research by
Rowland of New Mexico and colleagues:
                                                    
http://www.physorg.com/news153150994.html



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