Diptera.info :: Identification queries :: Diptera (adults)
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 Polietes sp.
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| Robert Heemskerk |
Posted on 06-11-2008 17:04
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 Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
hi flyforum, Polietes lardaria or Polietes meridionalis? I can see a bit yellow anterior spiracle.. Are there more specific hard characteristics to make a difference between these two? robert Robert Heemskerk attached the following image:  [122.79Kb] Greeting, Robert Heemskerk ---- WWW: http://robertheem...ndedag.htm --- |
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| Robert Heemskerk |
Posted on 06-11-2008 17:07
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Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
close up face
Robert Heemskerk attached the following image:  [130.83Kb] Edited by Robert Heemskerk on 06-11-2008 17:07 Greeting, Robert Heemskerk ---- WWW: http://robertheem...ndedag.htm --- |
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| Stephane Lebrun |
Posted on 06-11-2008 20:04
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
Golden yellow pollinosity on face, parafacialia wider than flagellomere. P. meridionalis. 
Stephane. |
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| Juergen Peters |
Posted on 06-11-2008 20:38
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 Member Location: northwest Germany Posts: 14139 Joined: 11.09.04 |
Hello, Stephane! Stephane Lebrun wrote: parafacialia wider than flagellomere. Urks...  Found none of these terms in the glossary. Would it be much work to show them via arrows on the photo? Thanks in advance! (I have taken several Polietes shots in the last weeks and can't decide, which species. Perhaps I'll post one or the other in the next days...)
Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| Robert Heemskerk |
Posted on 06-11-2008 20:53
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Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
Hi Juergen, I am also studying on these two terms; Parafaciala = that portion of the face between the facial ridges and the eyes. Flagellomere = an individual subdivision or unit of the antennal flagellum. I think it is the width of the flagellomere?, not the length..? Greeting, Robert Heemskerk ---- WWW: http://robertheem...ndedag.htm --- |
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| Stephane Lebrun |
Posted on 06-11-2008 21:02
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Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
Some work has already been made here : http://www.dipter...ad_id=8809 I wanted to say : parafacialia in middle broader than width of 1st flagellomere (=3d ant. segment), to be precise.
Edited by Stephane Lebrun on 06-11-2008 21:04 Stephane. |
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| javanerkelens |
Posted on 06-11-2008 21:40
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 Member Location: Netherlands Posts: 2962 Joined: 18.10.07 |
Somethink like this.... Greatings Joke javanerkelens attached the following image:  [132.62Kb] |
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| Robert Heemskerk |
Posted on 06-11-2008 21:48
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Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
I think the parafacialia is a bit lower in the face?
Greeting, Robert Heemskerk ---- WWW: http://robertheem...ndedag.htm --- |
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| Juergen Peters |
Posted on 08-11-2008 19:21
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Member Location: northwest Germany Posts: 14139 Joined: 11.09.04 |
Hello! Thanks to all for your explanations! Now I see a little bit clearer  . Today I have made dozens of Polietes pictures, I can compare now - hoping to also find a species other than lardarius...
Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| John Bratton |
Posted on 12-11-2008 12:33
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Member Location: Menai Bridge, North Wales, UK Posts: 654 Joined: 17.10.06 |
It isn't clear in Muscidae of Central Europe (Gregor et al.) that the parafacial character only applies to males. In the key they say ...parafacialia in middle narrower than flagellomere = P. lardarius ... parafacialia in middle broader than flagellomere = meridionalis. And in the description of P. lardarius (p. 102) they start by saying "parafacial at middle somewhat narrower than flagellomere". But later in the same description they say "Female parafacial broader than flagellomere", so "narrower than" must only apply to males. All the autumn Polietes I've caught (only five) have the colouring of meridionalis, despite this species not being on the British list. But they have all been female so I've not been able to check the leg bristle character that Gregor et al. mention for separating male lardarius and meridionalis. John Bratton |
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| Robert Heemskerk |
Posted on 20-12-2008 20:50
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Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
hi John, And did you check the colouring of the anterior spiracle? From what I understand, that's a rather additive character of P. meridinalis Robert, Greeting, Robert Heemskerk ---- WWW: http://robertheem...ndedag.htm --- |
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