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RE: Tegenaria agrestis
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Helsdingen, P.J. van
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Apr 27, 2009 00:08 PDT
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The whole story about Tegenaria agrestis being harmfull to humans is a
well-known HOAX!
Peter van Helsdingen
P. J. van Helsdingen
European Invertebrate Survey - Nederland
European Invertebrate Survey - International
National Museum of Natural History
Darwinweg 2, 2333 CR Leiden, Netherlands
P.O. Box 9517, 2300 RA Leiden, Netherlands
tel.: (0031) 71 56 87 413 or (0031) 06 51058720
fax: (0031) 71 56 87 456
E-mail: helsd-@nnm.nl <mailto:helsd-@nnm.nl>
http://www.naturalis.nl/eis <http://www.naturalis.nl/eis>
http://www.european-arachnology.org/reports/fauna.shtml
<http://www.european-arachnology.org/reports/fauna.shtml>
P denk aan het milieu - dit mailtje printen is niet altijd nodig
"There is grandeur in this view of life" (Darwin 1859)
Van: Greta Binford [mailto:binf-@lclark.edu]
Verzonden: zondag 26 april 2009 20:03
Aan: arach-@topica.com
CC: Melissa M Gaver
Onderwerp: Re: Tegenaria agrestis
Hi Chuck,
I know Melissa is very interested in the issue of T. agrestis
diagnosis/misdiagnosis. I'll forward this to her and let her respond
directly if she would like.
Zach, I collected T. agrestis easily in urban abandoned woodlots in Salt
Lake City in the mid 1990s. I can look up detailed records of localities
if it would help. As Chuck suggests you would likely have the best luck
under clutter (undisturbed for a few years is best) on the outskirts of
town. The biggest ones will be directly between debris and the ground.
Webs don't stick out much from the debris.
Hope this helps.
All my best,
Greta
On Apr 25, 2009, at 4:35 PM, Chuck Kristensen wrote:
Hi Greta,
We also supplied some venom to Hernan, who also saw weak activity in
another test (not animal injection) if I remember correctly. It's been a
while. His work with spiders pretty much stopped when they made him the
homeland security guy for Michigan after 9/11.
Is Melissa doing any venom toxicology and physiology? I thought that she
was doing biology and ecology.
Zach,
At one time they were fairly easy to find in open fields under rocks
near Salt Lake City. Sorry ... I do not have locations.
Best,
Chuck
Spider Pharm
PO Box 1090
Yarnell, AZ 85362
http://www.spiderpharm.com
chu-@spiderpharm.com
928-427-6589
From: Zach Valois [mailto:OutLande-@yahoo.com]
Sent: Saturday, April 25, 2009 9:44 AM
To: arach-@topica.com
Subject: Re: Tegenaria agrestis
Interesting work Greta, I recall speaking with Warren Savary about your
work on this during our last sampling trip together.
Perhaps I will get out and try to collect some of these. Does anyone
have any specific locations for them in Utah?
Zachary J. Valois
Salt Lake City, Utah
Z_Va-@yahoo.com
--- On Sat, 4/25/09, Greta Binford <binf-@lclark.edu> wrote:
From: Greta Binford <binf-@lclark.edu>
Subject: Re: Tegenaria agrestis
To: arach-@topica.com
Date: Saturday, April 25, 2009, 9:37 AM
Hello all,
Melissa Gaver is working on Tegenaria agrestis for part of her
Ph.D. work. What
I did was a comparative analysis between Pacific Northwest T.
agrestis and
European T. agrestis because I thought it was interesting that
there were never
any reports of clinical issues associated with their venoms in
Europe. I was
curious to know if there were unique chemicals in the US
populations or if I
could find some other difference between the two (habitat,
proximity to humans,
etc). I did not find evidence of chemical difference between US
and European
populations, but I did find striking differences between sexes
within
populations. I also did not find any differences in insecticidal
potency between
the populations. This is all published in a m
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