Diptera.info :: Identification queries :: Diptera (adults)
 Questions on Norellia spinipes sex
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| Joerg Schneider |
Posted on 19-03-2026 15:33
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Member Location: Posts: 818 Joined: 08.04.21 |
I hope I can come up here with some questions on male N. spinipes - and you with some answers. And I would very much appreciate a hint on some reviewing literature. On some of my pictures of male N. spinipes I see a kind of spike, coming out ventrally towards the end of the abdomen (I do not dare to count segments). In other pictures it looks as if it’s a pairy appendix. And what is it good for – kind of Aedeagus? Or something to hold the female? Thank you so much for your help, any hints are extremely welcome, Jörg Joerg Schneider attached the following image:  [46.02Kb] |
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| Joerg Schneider |
Posted on 19-03-2026 15:34
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Member Location: Posts: 818 Joined: 08.04.21 |
Spike close to the body...
Joerg Schneider attached the following image:  [68.18Kb] |
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| Joerg Schneider |
Posted on 19-03-2026 15:35
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Member Location: Posts: 818 Joined: 08.04.21 |
Spike and some other appendices?
Joerg Schneider attached the following image:  [46.39Kb] |
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| Joerg Schneider |
Posted on 19-03-2026 15:35
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Member Location: Posts: 818 Joined: 08.04.21 |
Spike now looks more like a very short "leg"
Joerg Schneider attached the following image:  [38.38Kb] |
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| Joerg Schneider |
Posted on 19-03-2026 15:36
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Member Location: Posts: 818 Joined: 08.04.21 |
What happens with spike during copula?
Joerg Schneider attached the following image:  [69.1Kb] |
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| Joerg Schneider |
Posted on 19-03-2026 15:37
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Member Location: Posts: 818 Joined: 08.04.21 |
Again - copula.....
Joerg Schneider attached the following image:  [112.1Kb] |
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| Jan Willem |
Posted on 20-03-2026 10:59
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 Member Location: Waalwijk, The Netherlands Posts: 2168 Joined: 24.07.04 |
What you are referring to is the 5th sternite which is used to 'hold' the female during copulation.
Jan Willem van Zuijlen |
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| Joerg Schneider |
Posted on 20-03-2026 12:38
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Member Location: Posts: 818 Joined: 08.04.21 |
Oh great, thank you so much! So it is not one "spike" but should be two. Is this known from (which other) flies? Could you please recommend any further reading on this complex? Kindest regards, Jörg |
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| Joerg Schneider |
Posted on 20-03-2026 19:38
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Member Location: Posts: 818 Joined: 08.04.21 |
Thanks to Jan's explanation I had a closer look. So they come in pairs :-) Still, if anyone would be kind enough to supply some more general info on that (e.g.: how common in flies?), it would be gratefully appreciated. Kindest regards, Jörg Picture 1: ventral view Joerg Schneider attached the following image:  [252.59Kb] Edited by Joerg Schneider on 20-03-2026 19:40 |
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| Joerg Schneider |
Posted on 20-03-2026 19:41
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Member Location: Posts: 818 Joined: 08.04.21 |
Lateral view
Joerg Schneider attached the following image:  [284.03Kb] |
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| Joerg Schneider |
Posted on 20-03-2026 19:42
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Member Location: Posts: 818 Joined: 08.04.21 |
Ventral view - how are these "special legs" called????
Joerg Schneider attached the following image:  [281.49Kb] |
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| libor |
Posted on 20-03-2026 21:09
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Member Location: western Bohemia Posts: 1300 Joined: 30.05.09 |
Joerg, similar segments you can see in some European Micropezidae, for example... Libor |
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