[Odonata-l] zygopteran appendage shape

[Dennis Paulson]

I have seen in the field and from the photos of others several cases  
of female Nehalennia irene with only the male abdomen attached to her  
after a predator has bitten off the head and thorax. I presume that  
they can never get rid of this dead male.

On Dec 11, 2006, at 7:59 AM, Cannings, Rob RBCM:EX wrote:

> Hi All: Another genus that oviposits in this manner is Nehalennia.  
> At least N. irene does.
>
> Rob
>
> Dr. Robert A. Cannings
> Curator of Entomology
> Royal British Columbia Museum
> 675 Belleville Street
> Victoria, BC, Canada   V8W 9W2
> Phone: (250) 356-8242. Fax: (250) 356-8197
> E-mail: rcannings at royalbcmuseum.bc.ca
>
> From: odonata-l-bounces at listhost.ups.edu [mailto:odonata-l- 
> bounces at listhost.ups.edu] On Behalf Of Thomas Schultz
> Sent: Thursday, December 07, 2006 4:30 PM
> To: William Hull
> Cc: odonata-l at listhost.ups.edu
> Subject: Re: [Odonata-l] zygopteran appendage shape
>
> Hi all,
>
> If you go to the website below and search for signatum in the box  
> at the upper right, you'll see male Orange Bluets in sentinel  
> position, with wings flapping, and descending into the water while  
> in tandem with a submerged female.
>
> http://content.denison.edu/cdm4/browse.php
>
> Tom
>
>
> Tom D. Schultz, Ph.D.
> Tight Distinguished Professor
> in the Natural Sciences
> Department of Biology
> Denison University
> Granville, OH 43023
> 740-587-6218
>
>
> On Dec 7, 2006, at 3:46 PM, William Hull wrote:
>
>> This E. civile pair is the photo that sparked the exchange between
>> Dennis and myself.  The male is upright and, although I did not note
>> it at the time, there appears to be no wing motion.
>>
>> http://www.mangoverde.com/dragonflies/images/00000000458.jpg
>> -- 
>> Cheers,
>> Bill Hull
>> Cincinnati, OH, USA
>> http://www.mangoverde.com/
>>
>> On 12/6/06, Ylightfoot at aol.com <Ylightfoot at aol.com> wrote:
>>>
>>>
>>>
>>> In a message dated 12/6/2006 1:47:13 PM Pacific Standard Time,
>>> dennispaulson at comcast.net writes:
>>> Species of Argia oviposit mostly in the open, often in current  
>>> and where
>>> there would be nothing for the male to grasp. Enallagma much more  
>>> often
>>> oviposit on emergent vegetation or floating vegetation in still  
>>> water where
>>> the male can rest at water level.
>>> Hi Dennis:
>>>
>>> Interesting topic.  I have some video footage of Enallagma civile
>>> ovipositing in tandem, and the male is upright and not holding on to
>>> anything, but as I recall, he is flapping his wings like crazy.   
>>> It seems to
>>> me Argia males are able to remain attached upright with their  
>>> wings still,
>>> no?  In the instance of E. civile oviposition above I believe the  
>>> pair were
>>> ovipositing on the undersurfaces of small floating leaf clusters  
>>> in a creek,
>>> so habitat might have been involved.  Would be interesting to  
>>> note if others
>>> report Argia males standing erect with wings still versus  
>>> Enallagma males
>>> standing erect (when they do so) with wings moving, while  
>>> ovipositing in
>>> tandem.
>>>
>>> Argia also have tori on the dorsoapical margin of segment 10  
>>> which may serve
>>> as extra "padding" or support for maintaining a still, vertical  
>>> position
>>> while attached to the ovipositing female.
>>>
>>> Cheers,
>>>
>>> Tim
>>> _______________________________________________
>>> Odonata-l mailing list
>>> Odonata-l at listhost.ups.edu
>>> https://mailweb.ups.edu/mailman/listinfo/odonata-l
>>>
>>>
>>>
>> _______________________________________________
>> Odonata-l mailing list
>> Odonata-l at listhost.ups.edu
>> https://mailweb.ups.edu/mailman/listinfo/odonata-l
>
> _______________________________________________
> Odonata-l mailing list
> Odonata-l at listhost.ups.edu
> https://mailweb.ups.edu/mailman/listinfo/odonata-l

-----
Dennis Paulson
1724 NE 98 St.
Seattle, WA 98115
206-528-1382
dennispaulson at comcast.net



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailweb.ups.edu/pipermail/odonata-l/attachments/20061211/fc697089/attachment-0001.html