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The Society for the study of flies (Diptera)

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#1 2018-10-12 23:58:58

Richard Dickson
DF Members
Name: Richard Dickson
Registered: 2008-11-24
Posts: 317

Distiphallus of Sarcophaga subvicina?

After spending far too long on this Sarcophaga sp., I eventually came to the conclusion that it is S. subvicina, but that the vesica have failed to develop normally.
The rest of the fly is right apart from being very small. ST5 is right and the surstyli are right. I've met malformity and under-development in the genitalia of other insects, especially in moths, but if I'm right about what this is, it is the first time that I can remember seeing it in a fly.
Is this right?
The fly came from West Walk in Hampshire (SU6012) to a Malaise trap in July this year.


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Last edited by Richard Dickson (2018-10-12 23:59:49)

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#2 2018-10-13 11:14:04

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

Re: Distiphallus of Sarcophaga subvicina?

I think an aberrant subvicina is the simplest explanation for this.

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#3 2018-10-13 14:29:57

Richard Dickson
DF Members
Name: Richard Dickson
Registered: 2008-11-24
Posts: 317

Re: Distiphallus of Sarcophaga subvicina?

Thank you Tony, I appreciate your support.  I wondered if I'd fallen into the trap of backing my own theory! When you begin to believe something the danger is that you only notice the evidence that supports it.

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