Diptera.info :: Identification queries :: Diptera (adults)
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 Gymnosoma
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| Juergen Peters |
Posted on 26-09-2006 17:56
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 Member Location: northwest Germany Posts: 14101 Joined: 11.09.04 |
Hello! Does this pic show enough details to tell the species? Taken on Sep-24 in Ostwestfalen/Germany. Thanks in advance! Juergen Peters attached the following image:  [38.52Kb] Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| Zeegers |
Posted on 27-09-2006 20:58
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Member Location: Soest, NL Posts: 18948 Joined: 21.07.04 |
Well, it's a male. Either rotundatum or nudifrons, not sure Theo |
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| Stephen |
Posted on 27-09-2006 21:34
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 Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Theo, how do you tell it is a male from the photo? The eyes would be smaller if it were a female?
--Stephen Stephen Cresswell www.americaninsects.net |
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| Juergen Peters |
Posted on 28-09-2006 00:33
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Member Location: northwest Germany Posts: 14101 Joined: 11.09.04 |
Hello, Theo! Either rotundatum or nudifrons, not sure Thanks! Since weeks I'm trying to take good enough pics to make exactly that decision ;-). Would it be possible with a better photo? Stephen wrote: Theo, how do you tell it is a male from the photo? The eyes would be smaller if it were a female? I don't know if it is a valid criterion, but every time when I was sure about the sex (when seeing a mating couple), the females turned out to have less distinctive spots on the abdomen. Not exactly round, more floating together: ,%20Weibchen_007.jpg){kind=small}
Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| Zeegers |
Posted on 28-09-2006 20:41
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Member Location: Soest, NL Posts: 18948 Joined: 21.07.04 |
Well the second one is a female. Don't look at the abdomen, look at the thorax. Thorax is strongly golden dusted in front of suture in male, and (nearly) completely black in female. Very simple (and only correct in genus Gymnosoma !!!) Well illustrated by the two pictures Theo |
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