[Odonata-l] Odonata morphology, or, "name that sclerite"

[Rosser Garrison]

Nick,

I am in Pretoria and will be back in my office next Monday.  Will look into this when I return but I am not aware of a separate sclerite per se but will look.  I have Nesobasis from you---will I notice it on one of these males?

Rosser

Dr. Rosser W. Garrison
Senior Insect Biosystematist
Plant Pest Diagnostics
California Department of Food & Agriculture
3294 Meadowview Road
Sacramento, CA 95832-1448, USA
tel. (916) 262-1167 fax (916) 262-1190
email rgarrison at cdfa.ca.gov
http://www.cdfa.ca.gov/phpps/ppd/Garrison.htm
>>> "Nick and Ailsa Donnelly" <tdonelly at binghamton.edu> 04/20/07 11:35 AM >>>
I have been puzzling over morphological terminology recently, as I prepare
illustrations of North American odonates.  There is a tiny sclerite (I now
think it is a distinct sclerite) which does not seem to have a name, and I
am hoping that someone can tell me what it is.  Also what is its derivation?
Most of the historic gurus of odonate morphology (Tillyard, Asahina, Whedon)
don't mention it at all.

In coenagrionid male damselflies, there is a small rounded-triangular
process at the base of the parapricts, in lateral view.  I had assume this
was just part of the paraproct itself, and then I found that one of my
undescribed Fijian Nesobasis has this process enlarged and seemingly not
just a part of the paraproct after all.  In North American coenagrionids,
this process is most conspicuous in Argia.  I have also seen it in some
Platycnemidids, so it is not confined to coenagrionids.  I have not noted it
in a cursory look at Lestes.

Can someone tell me what this darn thing is called?