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#1 2013-02-22 19:28:25

chasmacey
DF Members
Name: Charles Macey
From: Farnham
Registered: 2013-01-04
Posts: 33
Website

Calliopum simillimum ?

Hi,

   These photos are of three different individuals, but I think they are of the same species and the closest match I can find is Calliopum simillimum.  They were taken in my garden in Farnham Surrey over various months (July,September and October).  Can anyone confim or otherwise suggest a possible Id for them ?

     Regards    Chas


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#2 2013-02-24 23:52:56

Mark
DF Members
Name: Mark Mitchell
From: Hampshire
Registered: 2008-06-17
Posts: 273

Re: Calliopum simillimum ?

Hi Chas

I could give you an answer - but first I will give the attendees of the this weekends workshop at Preston Montford a chance to show off their new Lauxaniid identification skills. :-)

Mark

Last edited by Mark (2013-02-25 00:24:03)

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#3 2013-02-25 14:37:27

Howard Bentley
Committee
Name: Howard Bentley
Registered: 2008-07-07
Posts: 794

Re: Calliopum simillimum ?

I was there! However, to distinguish C. simillimum from C. aeneum, as I understand it, you need number of acrostichal rows between the dorsocentrals and/or length of aristal hairs or details of ovipositor for females. I can't see enough of any of these to decide between the two. Put us out of our misery, Mark, and tell us how you did it!

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#4 2013-02-25 15:12:26

chasmacey
DF Members
Name: Charles Macey
From: Farnham
Registered: 2013-01-04
Posts: 33
Website

Re: Calliopum simillimum ?

Not sure if this angle helps any ?   .. 

    Regards   Chas


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Last edited by chasmacey (2013-02-25 15:13:42)

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#5 2013-02-25 17:18:54

muscapaul
DF Members
Name: Paul Beuk
From: Maastricht, Netherlands
Registered: 2010-01-06
Posts: 576
Website

Re: Calliopum simillimum ?

Well, not anxious to spoil a veritable quiz, but to help people along anyway: perhaps you should check to see if this is really Calliopum...

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#6 2013-02-25 18:23:26

conopid
DF Members
Name: Nigel Jones
From: Shrewsbury
Registered: 2008-02-27
Posts: 702
Website

Re: Calliopum simillimum ?

Well, if Paul hints it may not be Calliopum, it should be Sapromyza hyalinata. Although I would have plumped for Calliopum, so pray tell us how to do this. Is it the hint of a grey-white rather than shiny black face?


Nigel Jones
Shropshire

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#7 2013-02-25 18:44:22

muscapaul
DF Members
Name: Paul Beuk
From: Maastricht, Netherlands
Registered: 2010-01-06
Posts: 576
Website

Re: Calliopum simillimum ?

The colour of the mesonotum is indeed a clue that you are on the wrong track with Calliopum, but the best clue is in the chaetotaxy of the mesonotum. True, not easy with the black on black and realive low resoution of the image, but the character is visible.

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#8 2013-02-26 00:05:56

Mark
DF Members
Name: Mark Mitchell
From: Hampshire
Registered: 2008-06-17
Posts: 273

Re: Calliopum simillimum ?

If it helps any? There are some Calliopum here, but not all.

The clue on the non-Calliopum - should be two bumps on the face & silver dusting on hind margin of the scutellum.

There is one Calliopum photo that I would put a name to.

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#9 2013-02-26 00:10:49

Mark
DF Members
Name: Mark Mitchell
From: Hampshire
Registered: 2008-06-17
Posts: 273

Re: Calliopum simillimum ?

muscapaul wrote:

... the best clue is in the chaetotaxy of the mesonotum...

- very clear in 1st photo

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#10 2013-02-26 13:42:59

Howard Bentley
Committee
Name: Howard Bentley
Registered: 2008-07-07
Posts: 794

Re: Calliopum simillimum ?

How did I miss those bumps on the face which are so obvious in the first picture when you look at it carefully? There are real cautionary lessons to be learned here about identification from photographs. I could kick myself for accepting that this was a Calliopum without bothering to question it. I may be wrong, but I don't think I'd have gone thoughtlessly down that track if I'd had the specimen in front of me. Minettia longipennis (there, I've said it) is such a common fly - I'm really annoyed with myself!

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#11 2013-02-27 00:29:18

Mark
DF Members
Name: Mark Mitchell
From: Hampshire
Registered: 2008-06-17
Posts: 273

Re: Calliopum simillimum ?

Well done Howard!

pic 1-2 (+ extra posting)  = Minettia longipennis
pic 3 = Calliopum sp. - maybe aeneum?
pic 4 = Calliopum sp.
pic 5 = Calliopum sp. - very probably simillimum
pic 6 = Calliopum sp.

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#12 2013-02-27 02:05:43

chasmacey
DF Members
Name: Charles Macey
From: Farnham
Registered: 2013-01-04
Posts: 33
Website

Re: Calliopum simillimum ?

Thank you all who contributed to this thread, I have learnt quite a bit from all your comments by checking the technical terms you used and then trying to see the same in the photos.   and thanks Mark for the final Id's it all very much appreciated.


     Regards   Chas

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