Diptera.info :: Identification queries :: Diptera (adults)
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 Gymnosoma sp.
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| Michael Becker |
Posted on 11-08-2009 07:17
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Member Location: Germany, Neuss Posts: 1268 Joined: 16.01.07 |
Hello, here I am rather sure with the genus Gymnosoma. And I know that the determination of species by photo is nearly impossible. But is a good suggestion possible here? And is it a female or a male and how do I distinguish the genders? I found it end of june between an old vineyard and a forest near the river Ahr in western germany. Thanks, Michael Michael Becker attached the following image:  [39.22Kb] |
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| Zeegers |
Posted on 11-08-2009 20:25
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Member Location: Soest, NL Posts: 19011 Joined: 21.07.04 |
Yes, it is a male Gymnosoma, it is slightly atypical so no ID here. Theo |
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| Michael Becker |
Posted on 11-08-2009 20:31
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Member Location: Germany, Neuss Posts: 1268 Joined: 16.01.07 |
Thank you Theo. How do you distinguish males and females here (or in Tachinidae in general)? Michael |
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| Zeegers |
Posted on 11-08-2009 21:05
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Member Location: Soest, NL Posts: 19011 Joined: 21.07.04 |
Any real observation need to check the genitalia In this case, it is easy: thorax dusted anterior -> male completely black -> female Rules of thumb: * males have vertex narrower than females * females have 2 pairs of proclinate orbital setae on frons * anything with long pulvilli is male |
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| Michael Becker |
Posted on 12-08-2009 07:21
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Member Location: Germany, Neuss Posts: 1268 Joined: 16.01.07 |
Thank you again, Theo. Greetings, Michael |
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