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The Society for the study of flies (Diptera)

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#1 2012-06-09 21:29:50

colinleb
DF Members
Name: Colin Le Boutillier
From: Luton, Bedfordshire
Registered: 2008-03-03
Posts: 156

Tephritis conura and matricariae

I have several specimens which would key out quite well as Tephritis conura, using White’s key (RES Handbook vol 10 part 5a, 1988).  However the NBN Gateway suggests T. conura has a northern and western distribution and my specimens were all taken within a few miles of Luton, Bedfordshire.

From Alan Stubbs’ picture wing flies key my specimens do not seem to fit with conura so well, as the dusting and hairs on the thorax don’t seem at all brownish/yellowish.  In that case matricariae seems right except that the small clear spots beside vein r-m (one on each side) appear to be quite definite, as depicted in Bernhard Merz Insecta Helvetica 10, 1994, Fig 53e.  Another character which fits with Merz’ key is that the posterior notopleural bristle is notably whitish.

T. matricariae was not on the British list until 2000 and is not included in White’s key.  NBN has few records for T. matricariae anywhere.

Length 6mm and wing length 4mm.

Can I safely label these as matricariae or do I need an expert to check them first?

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#2 2012-06-09 22:35:29

conopid
DF Members
Name: Nigel Jones
From: Shrewsbury
Registered: 2008-02-27
Posts: 619
Website

Re: Tephritis conura and matricariae

In my opinion, these are hard to separate without comparative specimens. I'd get them checked over.


Nigel Jones
Shropshire

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#3 2012-06-10 20:30:41

brianh
DF Members
Name: Brian Harding
From: Kidlington, Oxfordshire
Registered: 2008-10-27
Posts: 321

Re: Tephritis conura and matricariae

If your measurements are accurate then your specimens should be T. matricariae.
In the Laurence Clemons paper in Entomologists Record vol 112 p225-230 the wing length for T. conura is given as 4.6 - 5.7 mm, and for T. matricariae as  3.3 - 4.3 mm in males and 3.5 - 4.5 mm in females.
The NBN Gateway is data deficient. In Dipterist Digest 2009 vol 16 p52 it is reported that T. matricariae has been reported from Kent, Norfolk, Suffolk, Cambridgeshire, Essex, Hertfordshire, Surrey, Sussex, Middlesex, and Northamptonshire. So a record from Bedfordshire should not be unexpected. Whilst the NBN Gateway is also likely to be data deficient for T. conura you are right to note that it does appear to have a western/northern distribution.

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#4 2012-06-13 00:47:23

colinleb
DF Members
Name: Colin Le Boutillier
From: Luton, Bedfordshire
Registered: 2008-03-03
Posts: 156

Re: Tephritis conura and matricariae

Thanks Nigel, Brian

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