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Diptera.info :: Identification queries :: Diptera (adults)
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1 mm long Sphaeroceridae, NE HU, Oct > Scuttle Phoridae, Metopina!
pwalter
#1 Print Post
Posted on 26-10-2009 12:16
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Hi, this weekend I found this small Sphaero (1.2 mm) on housewall. Wing is a bit broken. Can it be IDd?
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Edited by pwalter on 26-10-2009 12:22
 
pwalter
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Posted on 26-10-2009 12:17
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pwalter
#3 Print Post
Posted on 26-10-2009 12:18
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Edited by pwalter on 26-10-2009 12:20
 
pwalter
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Posted on 26-10-2009 12:21
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phil withers
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Posted on 26-10-2009 12:21
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This is a phorid : Metopina
 
pwalter
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Posted on 26-10-2009 12:23
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SuprisingSmile When I take the wing and legs without spikes now I also see it is a Phorid! Thanks!
 
pwalter
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Posted on 01-11-2009 22:15
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Hi, I made some genitalia fptps, not good sadly. Can someone ID this specimen? It would be really interesting!
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pwalter
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Posted on 01-11-2009 22:15
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phil withers
#9 Print Post
Posted on 01-11-2009 22:23
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Genitalia are not helpful with Metopina: you need to mount the abdomen ventral side uppermost, and the hind leg posterior face uppermost. Then I can tell you what species it is...perhaps.
 
pwalter
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Posted on 01-11-2009 22:27
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Thanks, than there's no chance, The abdomen is quite destroyed... Sad Maybe next time!
 
pwalter
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Posted on 07-11-2009 10:38
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I forgot to ask if this is also true for other Phorids, that male genitalia preparations are not enough?
 
KWQ
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Posted on 07-11-2009 16:39
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In my opinion it really varies with regard to genera, but generally it seems that Phoridae is perhaps the toughest nut to crack of all European fly families.

Yet there are some slightly easier genera included like Anevrina, Borophaga, perhaps Diplonevra etc. where not all species require any genital studies.

This was my first glimpse of a Metopina!

Disney (1983, 1989 etc.) recommends genital-slide technique in families like Megaselia and Phora. Has anyone here tried that method? I find Phora a very difficult genus, no matter in which position you try to place the genitals. As to Megaselia the problem is mainly the huge size of the family, there is such a great amount of undescribed species. I.e. I have heard a rumour that there would be more than 500 Megaselias in Sweden! But you can occasionally spot one or two characteristic ones also in that mega-family.
 
phil withers
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Posted on 07-11-2009 21:39
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I routinely slide-mount all Phoridae, and am able to identify 90% of non-Megaselia with confidence (the proportion of Megaselia is more like 9%). It wouldn't surprise me in the least if there were at least that many Megaselia in Sweden; not a country reknowned for phoridologists. As to genitalia mounts, phorids are quite kind in terms of orientation: the abdomen generally lies nicely lateral (as required for all but Metopina); when the genitalia have cleared somewhat, most of the structures are readily visible - Phora is then relatively easy...Relatively.
 
pwalter
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Posted on 07-11-2009 21:49
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Dear Phil, do You mount the specimen as a whole?
 
phil withers
#15 Print Post
Posted on 07-11-2009 23:57
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Yes, under two coverslips, one for the genitalia and a wing, the other for the rest (having first separated a hind leg).
 
pwalter
#16 Print Post
Posted on 08-11-2009 09:32
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Thanks for both of You!
 
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