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The Society for the study of flies (Diptera)

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#1 2012-09-11 23:17:12

afbainbridge
DF Members
Name: Anthony Bainbridge
From: Codford, Wiltshire
Registered: 2008-10-25
Posts: 39

A Lauxaniid

Taken recently near my home in Wiltshire, I believe this to be the Lauxaniid Homoneura biumbrata.  Am I wide of the mark?


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#2 2012-09-12 00:50:58

brianh
DF Members
Name: Brian Harding
From: Kidlington, Oxfordshire
Registered: 2008-10-27
Posts: 326

Re: A Lauxaniid

On the basis of the wing markings and veins I think that it is Opomyza florum.

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#3 2012-09-13 12:11:13

afbainbridge
DF Members
Name: Anthony Bainbridge
From: Codford, Wiltshire
Registered: 2008-10-25
Posts: 39

Re: A Lauxaniid

Thank you, Brian - I agree.  The problem I've often found with acalypterate keys lies with the costal break.  The break in this specimen is hardly to be distinguished from the slightest of costal narrowing - certainly not a distinct break.  I dislike having to rely upon i/d features, like the existence and location of the break, which cause one to spend hours at the eyepiece. 
AFB

Last edited by afbainbridge (2012-09-13 13:31:00)

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