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The Society for the study of flies (Diptera)

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#1 2018-11-05 13:27:29

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1019

Is this a Lesser Dung fly?

Found on a rock ledge at the bottom of a cliff in Dorset, June. A bad place for photos, so could only manage top-down images in poor light. But I can make out the fact that it has a weird structure on the dorsum, with a bridged effect between the scutum and the scutellum.


About 6 - 8 mm long. Has orange legs.

I don't expect I can progress this much without better photos, or a specimen -Ii have neither. But it would be interesting to know if I'm in the right ball-park.

Nigel G.


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#2 2018-11-05 19:56:21

Tony Irwin
DF Members
Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 762

Re: Is this a Lesser Dung fly?

This is Coelopa frigida (Coelopidae). A sphaerocerid would have a much shorter hind metatarsus.

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#3 2018-11-05 21:55:18

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1019

Re: Is this a Lesser Dung fly?

I have to admit that that is amazing, Tony. Thank you!

I had thought I'd made a good start by suggesting a sphaerocerid, not having seen a fly with that sort of odd anatomy before. But I was wrong. Nor have a heard of a seaweed fly, but Steven Falk calls this one a Bristly-legged Seaweed fly.  I certainly found it in the right place.

Thanks again
Nigel G.

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