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Dragonfly Head

 
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svalley



Joined: 03 Dec 2006
Posts: 288
Location: Albany, Oregon

PostPosted: Sun Oct 08, 2017 2:05 pm    Post subject: Dragonfly Head Reply with quote

A female Erythemis collocata from Freeway Lakes, Albany, Oregon, USA, 9-Aug-2017.

Nikon D810 with 5x Mitutoyo mounted on a 200mm Micro-Nikkor, single diffused flash with reflector, StackShot, Zerene Stacker.







Enjoy, Steve
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Steve Valley - Albany, Oregon
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JH



Joined: 09 Mar 2013
Posts: 1103
Location: Vallentuna, Stockholm, Sweden

PostPosted: Mon Oct 09, 2017 10:46 pm    Post subject: Reply with quote

Nice and informative pictures.
Best regards Jörgen Hellberg
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Sumguy01



Joined: 28 Jan 2013
Posts: 1085
Location: Ketchikan Alaska USA

PostPosted: Sun Oct 15, 2017 5:16 pm    Post subject: Reply with quote

Very nice.
Thanks for sharing.
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RobertOToole



Joined: 17 Jan 2013
Posts: 670
Location: United States

PostPosted: Mon Oct 30, 2017 6:35 pm    Post subject: Reply with quote

Very good work.

Thanks for adding all the technical details.

All the best,

Robert
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Beatsy



Joined: 05 Jul 2013
Posts: 1197
Location: Malvern, UK

PostPosted: Tue Oct 31, 2017 10:43 am    Post subject: Reply with quote

Very nice set. In the first pic, there's a red thingy on top of the left eye that seems missing in the rest. Reminiscent of a mini scorpion (but obviously not). Any ideas?
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rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 18907
Location: Richland, Washington State, USA

PostPosted: Tue Oct 31, 2017 11:02 am    Post subject: Reply with quote

Beatsy wrote:
In the first pic, there's a red thingy on top of the left eye that seems missing in the rest. Reminiscent of a mini scorpion (but obviously not). Any ideas?

Good eyes! That looks like a pseudoscorpion. As Wikipedia says: They are tiny and inoffensive, and are rarely seen due to their small size, despite being common in many environments. Pseudoscorpions often carry out phoresy, a form of commensalism in which one organism uses another for the purpose of transport.

I had never seen the things until about a year ago, when out of curiosity I put a sample of "dirt" from the bottom of a compost pile into a berlese funnel separator. Lo and behold, out the bottom eventually came a horde of tiny springtails, and several pseudoscorpions. But I did not know the bit about phoresy until reading the Wikipedia article this morning.

--Rik
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Beatsy



Joined: 05 Jul 2013
Posts: 1197
Location: Malvern, UK

PostPosted: Tue Oct 31, 2017 11:12 am    Post subject: Reply with quote

rjlittlefield wrote:

Good eyes! That looks like a pseudoscorpion. As Wikipedia says: They are tiny and inoffensive, and are rarely seen due to their small size, despite being common in many environments. Pseudoscorpions often carry out phoresy, a form of commensalism in which one organism uses another for the purpose of transport.
--Rik


Well I never! Thanks for the info Rik. Shame it fell off. Looked perfectly posed for what might have been a stunning high mag image to add to the set. Could it still be lurking around under the specimen mount Steve?
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svalley



Joined: 03 Dec 2006
Posts: 288
Location: Albany, Oregon

PostPosted: Thu Nov 02, 2017 4:01 pm    Post subject: Reply with quote

I missed the last few posts for some reason. Very cool that I got a Pseudoscorpion and didn't even realize. They have venom fangs at the ends of their chelae (claws). The chitinous exoskeleton part of the chelae are made from metallo-organic compounds.
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