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Diptera.info :: Identification queries :: Diptera (adults)
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Male Pollenia species?
Mtfyfe
#1 Print Post
Posted on 03-01-2018 21:45
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Found 27.12.17, Tuebingen, Southern Germany, at house front.
Mtfyfe attached the following image:


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Mtfyfe
#2 Print Post
Posted on 03-01-2018 21:45
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Second picture
Mtfyfe attached the following image:


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Mtfyfe
#3 Print Post
Posted on 05-01-2018 21:47
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Hi all,
nobody has an opinion about this thread?
Cheers, Lars
 
Juergen Peters
#4 Print Post
Posted on 05-01-2018 22:57
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Hi Lars,

Mtfyfe wrote:
nobody has an opinion about this thread?


I can only say Pollenia sp..
Best regards,
Jürgen

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Juergen Peters
Borgholzhausen, Germany
WWW: http://insektenfo...
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 
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johnes81
#5 Print Post
Posted on 06-01-2018 20:50
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photos are too small to judge various features. I have no doubt about rudis group. My bet is rudis but we cannot separate it from angustigena, hungarica and pediculata using these photos.

Pollenia sp. rudis group is as far as we can go here.
John and Nini. Naturalists not experts.
 
Mtfyfe
#6 Print Post
Posted on 07-01-2018 21:20
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Thanks Jürgen and John,
so this would leave at least four to chose from.
Is there any feature, apart from the genitals, which could distinguish those four options?
It is always good to know what to focus on for the next pictures to take. Especially since I am only taking pictures in the field and do no microscopic work.
Cheers, Lars
 
johnes81
#7 Print Post
Posted on 08-01-2018 13:08
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conjecture is not a scientific answer, so genitalia is the only accurate way to id many species of Pollenia. Dr. Rognes is the authority of this genus and Calliphoridae family. Dr. Rognes has made many publications available online. You can learn best from Dr. Rognes.

http://www.knut-rognes.no/PublicationsInZoology.html

I have added a photo of P. pediculata to the gallery which shows the bundle of pale hairs on the underside of the wing: https://diptera.info/photogallery.php?photo_id=10761

rudis will have black vestiture on the abdomen, front and hind femora. P. angustigena has golden yellow vestiture. You need clear photos of all of the legs. the pv of the front femora of many species is very helpful.

some people think that all Pollenia require genitalia but this isn't true. several species can be easily identified by photo if the useful features are visible. for example, vagabunda, mayeri, atramentaria and amentaria. The rudis group is difficult. The head in profile view can be helpful. Still, the rudis group typically requires genitalia.

I cannot see golden vestiture but the photos are not large enough to be sure. The hairs are not always obvious. The head reminds me most of rudis and if the vestiture is indeed black, then you probably have a male rudis in this photo. I cannot see the legs well enough to eliminate angustigena and pediculata. hungarica is near impossible to separate from rudis.

In Germany, I find rudis more often at my residence than other Pollenia species.

John and Nini. Naturalists not experts.
 
Mtfyfe
#8 Print Post
Posted on 08-01-2018 23:35
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Thanks John,
this was very detailed and informative. So for the next time I will give my best to get more detailed pictures.
Lars
 
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