Diptera.info

Posted by Robert Heemskerk on 22-09-2008 21:21

hi flyforum,

Crossveins are infuscated.
I think the foretibia got posterior setae (one long setae on the foretibia and some smaller setae next to it)
The palps seems dark(black) to me..
End of the scutem got orange tip.

Don't know what prescutellar ac meant? (what is ac?)

Is id possible?

Robert - lost in terminology -

Edited by Robert Heemskerk on 26-09-2008 23:12

Posted by Robert Heemskerk on 26-09-2008 23:43

hi flyforum,
Looking back to earlier comments about Phaonia sp., I can say about the following speciesdifferences:

Posterior setae
P. valida en errans > No posterior setae.
P. tuguriorum/scutellata > posterior setae.

prescutellar ac
P. tuguriorum and P. scutellata got 1 prescutellar ac
P. valida en P. errans got 2 prescutellar ac.

In my pictures (above), I can see posterior setae (right?), so it should be P. tuguriorum (P. scutellata is not a Dutch specie)

looking at the prescutellar ac-feature, P. tuguriorum should have 1 prescutellar ac. In the following detail-picuture from my fly, I am not sure if this is 1 prescutellar ac?
(I coloured two pair of ac-setae in front of the scutum)
Is it? how do you count these prescutellar ac?

Are there other good features which can be used for determination?

(please forget the last blue line..):@

Edited by Robert Heemskerk on 26-09-2008 23:47

Posted by javanerkelens on 27-09-2008 17:31

Hello Robert,

I don't think it is P.valida/tuguriorum
Your fly has interfrontals and P.valida/tuguriorum has not.
(Maybe Thricops sp. postpronotal calli seems yellow)

But I'm no expert !! B)

Greatings Joke

Edited by javanerkelens on 27-09-2008 19:00

Posted by Robert Heemskerk on 27-09-2008 20:51

:| That is surpirsing me..

It are interfrontals indeed?!

I'll show you another picture where you can see it in a better dorsal way.
Look at the wingveins, the crossveins which are infuscated and the orange tip on the scutellum.
That's was why I was thinking about Phaonia..
DM-Cu got a gentle swing, this including it's size makes it more and more P. valida for me.

Sumarized I would say, many characters drives it to P. valida except:

- fore tibia with posterior setae? (if I'm critisizing correctly..)
- interfrontal setea ?

Edited by Robert Heemskerk on 27-09-2008 20:52

Posted by Robert Heemskerk on 28-09-2008 00:12

Now I see that I misunderstood the notion of posterior setae..

These setae are not the setae shown in my pictures of the tibia above (foretibia and setae), the posterior setae are located more in the middle of the fortibia. The bristles you see on the picture are the apical bristles, .. if I'am right..

The - interfrontal setea is still something that doesn't fit with Phaonia sp. . ..

Posted by Stephane Lebrun on 28-09-2008 09:51

#10

Indeed, there is no p setae on t1 and 2 prescutellar ac -> when can rule out P. tuguriorum/scutellata.
Whe can also rule out P. valida (no interfrontal setae).
I don't know whether P. errans female has interfrontals, but for the moment I have nothing better to propose.

Posted by nielsyese on 08-05-2013 20:07

#11

I think this is a female Phaonia valida after all because of the reddish upper part of antenna, wing venation (m1) and totally red front femora. The light appearance fits also more for P. valida. Maybe interfrontals can sometimes occur in this species. What do you think Stephane?