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#1 2019-04-09 19:07:00

mwoods
Registered user
Name: Michael Woods
From: Kent UK
Registered: 2018-07-24
Posts: 30

Coenosia

Hello,

Can anyone help.
I'm pretty sure that No 1 is C. tigrina eating a Minettia longipennis but the other four are different in some way; either in the amount and placing of the orange colouration on the legs, absent altogether in No 4, or the shape and distribution of the abdominal spots which seem to be reversed on No 3 (grey spots on black.) No 5 seems to be devoid of spots. 
No 2 is licking dung.

Are they all Coenosia and/or are they different genera/ species? I don't seem to be able to find a good match.

Thanks

Michael


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Last edited by mwoods (2019-04-09 19:11:44)

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#2 2019-04-09 20:29:26

Tony Irwin
DF Members
Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 786

Re: Coenosia

Agreed that 1 is Coenosia tigrina. But the other four all appear to lack the inverted isosceles triangle arrangement of katepisternal (sternopleural) bristles typical of Coenosiinae. I suspect that most are actually anthomyiids.

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#3 2019-04-10 18:32:21

mwoods
Registered user
Name: Michael Woods
From: Kent UK
Registered: 2018-07-24
Posts: 30

Re: Coenosia

Thank you Tony. 
I must confess that I struggled to see the sternopleural bristles on No1 even with fiddling with the original and enlarging it to massive dimensions. 
I've done the same with the others (there are actually more shots of each) but apart from No 2 which has at least the upper pair of bristles in the right place it's no dice.  So I'll check out anthomyiids.

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#4 2019-04-17 23:16:36

Stephane Lebrun
Registered user
Name: Stephane Lebrun
From: Le Havre, FRANCE
Registered: 2008-04-05
Posts: 602

Re: Coenosia

Except no 2 which is a Muscidae (probably Mydaea), I agree with Tony that other are Anthomyiidae (and of course No 1 which is C. tigrina as said).

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#5 2019-04-17 23:57:25

mwoods
Registered user
Name: Michael Woods
From: Kent UK
Registered: 2018-07-24
Posts: 30

Re: Coenosia

Thank you Stephane

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