[Megachile sp. ] Megachile female...

[Megachile sp. ] Megachile female...

Postby Rapha1 on 17 Jun 2009, 17:39

Megachile 2 - 15 mm - 09-06-2009.jpg
Megachile female - 15 mm - urban garden - Paris ( France)


hello, I would like to have your opinion on this megachile female of 15 mm, taken in a urban garden in Paris (France)

Thanks

Raphaël
Last edited by Rapha1 on 28 Jun 2009, 09:50, edited 1 time in total.
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Re: Megachile female...

Postby Christian on 23 Jun 2009, 10:32

Any Osmia or Megachile species, I cannot ID more.
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Re: Megachile female...

Postby Montanus on 23 Jun 2009, 22:00

Raphaël,
Can you post an enlargement of photo1 and photo3 showing the claws of the hind legs?

This may help us to differentiate between the two genera Christian mentions.

Øistein
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Re: Megachile female...

Postby Rapha1 on 24 Jun 2009, 14:16

Claws of the hind legs .jpg
Claws of the hind legs


hello Montanus and Christian,

Here is the Claws of the hind legs :wink:

Thanks of your help

Ps: the size of the insect was measured on the photo

Raphaël
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Re: Megachile female...

Postby Christian on 24 Jun 2009, 16:51

From claw structure is it a Megachile. By the large size, maybe willughbiella or related. I was disturbed the the color, because most Megachile are brownish without such a reddish shimmer as on photo, but maybe it is a effect of photographing.

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Re: Megachile female...

Postby Rapha1 on 25 Jun 2009, 02:04

Hello,

I heard Megachile willughbiella have a Broad abdomen,that seem different with my picture...is it true ?

an example of Megachile willughbiella :

http://www.galerie-insecte.org/galerie/ref-6929.htm
(from http://www.galerie-insecte.org/galerie/ ... iella.html )

Raphaêl
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Re: Megachile female...

Postby Montanus on 26 Jun 2009, 10:40

I have not heard about the width of abdomen as an identifying character in these Megachile-species.

Important characters are punctuation of clypeus and other parts of face, punctuation of metanotum and tergae, placement of ocelli, all these characters require a microscopical investigation.

The presence of white apical bands on tergae, as shown on your photo, is important, but there are several species with such bands.

regards,
Øistein
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Re: Megachile female...

Postby Rapha1 on 26 Jun 2009, 13:57

Thank you very much Øistein :wink:

Montanus wrote:The presence of white apical bands on tergae, as shown on your photo, is important, but there are several species with such bands.


What are are several species with such bands with this size (15 mm) ?

thank you

Raphaël
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Re: Megachile female...

Postby Montanus on 26 Jun 2009, 14:20

In addition to M. willughbiella, there are e.g.: lagopoda, maritima, ligniseca, ericetorum, albisecta, genalis, pilicrus, and melanopyga.

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Re: Megachile female...

Postby Christian on 26 Jun 2009, 19:26

Let me give an addition: your specimen don't look very typical for such an Megachile, but his may be effect of photographing. Lenght of gaster is unusual (you are right, that willughbiella normally is broader). But maybe you specimens englarges its abdomen in the moment of taking the pic. It is often problematic to identify a pic, wheras a pinned specimens will be easy to identify in seconds. But it don't make any more sense for me to discuss about your species ID, because it also may by any other relates species, and we cannot see important characters.

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Re: Megachile female...

Postby Rapha1 on 28 Jun 2009, 09:47

Ok, Thanks you Christian and Øistein,

Maybe it could be interesting to put on the Web ( in high résolution) a collection of pinned Europeen Megachiles specimens ?

Thanks

Raphaël
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Re: Megachile female...

Postby Christian on 28 Jun 2009, 10:55

Rapha1 wrote:Ok, Thanks you Christian and Øistein,

Maybe it could be interesting to put on the Web ( in high résolution) a collection of pinned Europeen Megachiles specimens ?

Thanks

Raphaël


Nice Idea. When I am retired, and when I will have too much time, maybe. But you can be sure that you will not succeed to identify your specimen even with pictures of all Europeen species. Some (or most) identification characters cannot be seen even on good photos (or you need 5-10 pic by species).

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Re: [Megachile sp. ] Megachile female...

Postby Darek Ogrodnik on 26 Nov 2017, 10:51

I agree it's M. willughbiella :wink:
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