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Most users ever online was 305 on Mon Nov 18, 2019 11:39 am


eupoedes sp? (again)

 
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sam smith



Joined: 15 Sep 2009
Posts: 19

PostPosted: Thu Apr 08, 2010 12:54 pm    Post subject: eupoedes sp? (again) Reply with quote

Took these pics this morning, thought is was E luniger, but now unsure, the angle between the eyes looks wrong. Any HELP, or will it just go down as another Eupoedes sp.
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John O'Sullivan



Joined: 05 Oct 2005
Posts: 128
Location: Sandy, Bedfordshire, UK

PostPosted: Sun Apr 11, 2010 5:10 pm    Post subject: Reply with quote

Hi Sam,

I think that it is probably luniger: the size and shape of the yellow spots are right, and they don't reach the sides of the abdomen, as in corollae. Though the angle is not perfect in any of the photos, the back of the head (occiput) seems more like luniger than latifasciatus. Size, shape and proportions all appear fine for luniger.

Concerning the eye-angle, the key in Stubbs and Falk urges great care. As your photos show, whether the outlines of the eyes appear to meet at ninety degrees depends on the angle of view. Even being sure to look from directly above, judging a right angle on two lines which are actually curved is not as easy as it might sound.

Other followers of this Forum will have more experience than I do of the "more than ninety-degree" species, and their comments would be useful. Rightly or wrongly, my own current practice, if the eye-angle is not clearly and obviously more than ninety degrees, and all other features visible in the field fit luniger, is to ascribe it to that (very common) species. If some feature looks odd (usually this means atypical size and extent of yellow spots, or joining spots), I take the specimen for examination under a microscope. They almost always turn out to be atypical luniger.

Happy hunting!

John
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sam smith



Joined: 15 Sep 2009
Posts: 19

PostPosted: Mon Apr 12, 2010 6:06 am    Post subject: Reply with quote

John
many thanks for taking the time to reply, your thoughts and comments are helpfull.
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Gerard Pennards



Joined: 04 Jan 2010
Posts: 18
Location: Amersfoort, The Netherlands

PostPosted: Mon Apr 12, 2010 9:23 am    Post subject: Reply with quote

Yes, it'a a male E. luniger.
It's a bit deformed, as regularly seen in specimens, the right side of the abdomen is a bit shrunken as can be seen by the size of the spots on tergite 2.
Greetings
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sam smith



Joined: 15 Sep 2009
Posts: 19

PostPosted: Tue Apr 13, 2010 9:01 am    Post subject: Reply with quote

Gerard
thanks for your reply.
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Roger K.A. Morris



Joined: 06 Nov 2005
Posts: 1652

PostPosted: Tue Apr 13, 2010 4:35 pm    Post subject: Reply with quote

Hello Sam

Always glad to have data for good records - do submit this to HRS

Regards

Roger
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sam smith



Joined: 15 Sep 2009
Posts: 19

PostPosted: Wed Apr 14, 2010 6:34 am    Post subject: Reply with quote

Roger
I will send you all our records for the year from our data base at the end of the season.

Regards
Sam
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