Diptera.info :: Identification queries :: Diptera (adults)
 Psychoda grisescens - but aedaegus in reverse!
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| Louis Boumans |
Posted on 16-10-2009 13:34
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Member Location: NO Oslo Posts: 262 Joined: 09.06.04 |
I'm a newcomer in Psychodidae.. But I'm quite confident this Psychoda is grisescens. But the asymmetrical genitalia - aedagus is the mirror image of the drawings in Phil Withers' book and the original description by Tonnoir 1922. I wonder what could be the explanation for this: - an artefact in my picture through the binocular (I don't think so; I checked and experimented taking pictures of small print letters) - mistake in Tonnoir, copied in Withers? - real variation? - I assume all pictures are from dorsal (= morphological ventral) side - could I be mistaken here? Does anyone have a picture or specimen of another P. grisescens, or anotjher idea? I am confused.. Thanks, Louis Louis Boumans attached the following image:  [58.34Kb] Edited by Louis Boumans on 16-10-2009 13:36 |
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| phil withers |
Posted on 16-10-2009 16:55
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Member Location: Lyon, France Posts: 521 Joined: 04.03.08 |
I suspect I mounted the specimen I drew upside down - especially as I always separate the upper and lower parts, this is easy to do (about half of the specimens in my collection look like that). This is definitely grisescens, as seen from the tiny teeth on the 9th sternite, and the shape of the aedeagus. Good photo... |
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| Louis Boumans |
Posted on 17-10-2009 00:38
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Member Location: NO Oslo Posts: 262 Joined: 09.06.04 |
Ah Thanks for the confirmation of the identification! It's great to be in direct contact with THE Phil Withers who wrote the British identification key! So far I kept all my Psychodidae in ethanol, so it didn't occur to me that it's actually equally logical to draw the genitalia from the ventral side. Checking once more Tonnoir's drawing I see that he states it in the caption: some species drawn "vu de dessus" some "vu de dessous" - hadn't noticed that! Louis Boumans attached the following image:  [7.34Kb] |
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