Diptera.info :: Identification queries :: Diptera (adults)
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 Thyridanthrax fenestratus/perspicillaris
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| javig |
Posted on 14-07-2007 14:32
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 Member Location: Spain Posts: 222 Joined: 21.04.07 |
Hi, I have seen this photo (http://www.dipter...to_id=1927) labeled "T. fenestratus", and this one (http://www.dipter...to_id=1876) IDed by D. Gibbs as T. perspicillaris... Can somebody explain the difference between these two species?  Thx! |
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| David Gibbs |
Posted on 14-07-2007 15:10
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 Member Location: Bristol, UK Posts: 833 Joined: 17.06.06 |
superficially very similar but perspicillaris has clear (whitish) squamae whereas fenestratus has the squamae infuscated blackish. perspicillaris is a southern species very common in the Mediterranean and not found in GB, fenestratus a more northern (and higher altitude?) species. |
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| javig |
Posted on 14-07-2007 16:01
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Member Location: Spain Posts: 222 Joined: 21.04.07 |
Many thanks, David. In the Iberfauna database, both species are listed as present in Spain, therefore... mmm... I think here is more complicated that in UK.... I still don't know how to distinguish the two species... I have read perspicillaris have two white bands in sternites I-II, but sternites are very difficult to see in a photo!  I need a very low point of view!!  |
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