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The Society for the study of flies (Diptera)

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#1 2018-09-21 20:17:18

mwoods
Registered user
Name: Michael Woods
From: Kent UK
Registered: 2018-07-24
Posts: 22

Platypezidae but which one?

I found this Platypezid wandering about on the upper surface of a large bracket fungus (Polyborus squamosus I think) on 4th May this year.
I think it may be either Bolopus furcatus which uses P. squamosus as its host. or Seri obscuripennis which also uses different bracket fungi as its host but is apparently very rare.  There is something about the hind tarsi though.
Can anyone shed light on its true identity?

Thanks


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#2 2018-09-21 21:33:55

Tony Irwin
DF Members
Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 764

Re: Platypezidae but which one?

I think you're right with Bolopus.

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#3 2018-09-22 00:45:21

mwoods
Registered user
Name: Michael Woods
From: Kent UK
Registered: 2018-07-24
Posts: 22

Re: Platypezidae but which one?

Much obliged Tony. There appears to be some modification of the hind tarsi, is this common to all Platepezidae?

Michael

Last edited by mwoods (2018-09-22 00:48:01)

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#4 2018-09-22 02:09:48

Tony Irwin
DF Members
Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 764

Re: Platypezidae but which one?

Yes, most of the species have a modified hind tarsus - hence the name "flat-footed flies". The modifications are different depending on the sex, and are usually different between genera, if not species. Do remember that the angle at which you view the hind foot is important - a slight change in aspect can make the foot look completely different.

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