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Diptera.info :: Identification queries :: Diptera (adults)
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Anthomyiidae for ID, N Spain
Piluca_Alvarez
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Posted on 04-01-2014 20:54
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Found walking on seaweeed, many specimens moving around in a beach in Asturias, N coast of Spain. Date: 22.12.2013.

I think this is Fucellia sp. I usually see Fucellia tergina in coastal Asturias, but this one has clearly some hairs between the acrostical bristles, which I didn't see in any of my Fucellis tergina. Can this be Fucellia maritima? Or is more probable an aberration? Please, any comment on this will be most welcome. This has me really puzzled. Thanks in advance!! Smile
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Edited by Piluca_Alvarez on 04-01-2014 20:55
 
Piluca_Alvarez
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Posted on 04-01-2014 20:56
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The hairs between the acrostical bristles can be seen here very well (at least, I think so Wink ).
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Edited by Piluca_Alvarez on 04-01-2014 20:59
 
Piluca_Alvarez
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Posted on 04-01-2014 21:00
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Another view, to see the proportion eye-gena.
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Piluca_Alvarez
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Posted on 04-01-2014 21:01
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One picture showing the bristles on median and hind legs.
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Piluca_Alvarez
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Posted on 04-01-2014 21:02
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Another view of the legs bristles.
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Michael Ackland
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Posted on 19-01-2014 22:50
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I think it is probably Fucellia maritima, as the hairs or small setulae between presutural acrostichal setae are distinct. The last photo is a male, the others females. Unfortunately I can't see the hind femoral tubercle on the male, as it is perhaps the most distinctive character to separate the species. The females are quite difficult regarding the width of the lower gena, as the range of the ratio compared to eye head is overlapping, but on a sample most specimens fit one or the other. Female F. maritima= gena 0.6–0.7 times the height of an eye, female tergina =gena, 0.5–0.65 times the height of an eye
 
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