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Diptera.info :: Identification queries :: Diptera (adults)
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Drosophilidae: Cacoxenus indagator? - yes
mammut
#1 Print Post
Posted on 17-04-2018 22:38
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Location: Castel Maggiore, Italy
Posts: 65
Joined: 06.12.11

This tiny fly (4-5 mm) visited several times a nesting site for bees (Osmia cornuta) situated on my balcony near Bologna, Italy. To me it looks like Cacoxenus indagator - is this the only possible species or are there other species with which it might be confused? Thanks for your help.
The pictures were taken on April 7, 2018.
mammut attached the following image:


[96.4Kb]
Edited by mammut on 21-04-2018 23:02
 
mammut
#2 Print Post
Posted on 17-04-2018 22:40
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Location: Castel Maggiore, Italy
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Photo 2
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mammut
#3 Print Post
Posted on 17-04-2018 22:41
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Location: Castel Maggiore, Italy
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photo 3
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[124.66Kb]
 
evdb
#4 Print Post
Posted on 17-04-2018 22:41
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Location: France (Loiret)
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No doubt for me but I am not a specialist
Eugene
 
http://portfolio.fotocommunity.fr/evdb
mammut
#5 Print Post
Posted on 17-04-2018 22:41
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Location: Castel Maggiore, Italy
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photo 4
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mammut
#6 Print Post
Posted on 17-04-2018 22:44
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Location: Castel Maggiore, Italy
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photo 5 taken on April 8, 2018 but which should show the same species after a visit in one of the bee's nests
mammut attached the following image:


[108.14Kb]
 
mammut
#7 Print Post
Posted on 18-04-2018 23:20
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Location: Castel Maggiore, Italy
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Thank you Eugene !
 
Ectemnius
#8 Print Post
Posted on 20-04-2018 12:32
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Location: The Netherlands
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Joined: 22.11.11

Hello mammut,

There are several other species of Cacoxenus in Europe. No known from Italy, but that doesn't tell a lot. I can however count about twelve visible acrostical rows on the scutum in your photo's. That confirms it as Cacoxenus indagator Loew, 1858. The other four European species have ten rows at maximum.

Kind regards,

Ectemnius
 
mammut
#9 Print Post
Posted on 21-04-2018 23:01
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Location: Castel Maggiore, Italy
Posts: 65
Joined: 06.12.11

Thank you very much Ectemnius for your confirmation and the explanations!
kind regards
Mammut
 
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