Diptera.info

Posted by javanerkelens on 01-06-2014 20:44

At first, nice photos!
I have doubt about the dorsal preapical setae on the hindtibia.
I can't see clearly if there are three or two long preapical setae.
It almost looks if there are three equally long dorsal preapical setae, what could mean...Pegomya bicolor.
If two...than P. deprimata indeed becomes a possibility.

I show you the precise position of those dorsal preapical setae...

Johanna

Edited by javanerkelens on 01-06-2014 20:46

Posted by skrylten on 01-06-2014 21:34

#10

Thanks for your comments and interest Johanna !

I would say 2 long dorsal pre apicals, the "red one" shouldn´t be dorsal ?

Edited by skrylten on 01-06-2014 21:36

Posted by javanerkelens on 01-06-2014 22:08

#11

Indeed seems the 'red' one more on the ad site.
So, with only two posterior preapical setea, we have to look if the other characters will fit to P. deprimata:

Occiput without any pale hairs ventrally = correct
Frontal vitta with cruciate interfrontals = correct
Hindtibia with only 2 ad = seems correct (not 100% good visible)
Postpedical dark = correct
Face almost flat = seems correct
(lower margin of head in profile shorter than length of head at level of lunule)
Parafacial in lateral view very narrow = seems correct

But I can't see if the lower katepisternal seta is only about 0,6 times length of upper katepisternal........if this also is correct, than we can assume this is indeed a female Pegomya deprimata (Zetterstedt)

Edited by javanerkelens on 01-06-2014 22:21

Posted by Michael Ackland on 02-06-2014 10:24

#12

It don't think it is P. deprimata or bicolor. P. deprimata has a dark abdomen with greyish dusting, larger postpedicel reaching to mouth margin. The ventral setae on hind femur are also much too strong and long for female deprimata. There are quite a few Pegomya species in Sweden, not found in Britain, which are little known.

I will post a couple of photos of what I think is deprimata when I have taken them, be a few days time.

Posted by Michael Ackland on 02-06-2014 14:33

#13

Photos are a female of Pegomya deprimata collected in S. France with males. The hind tibia in Skrylten's photos have some extra setulae anteroventrally in apical third, which are not present in my deprimata female. Note the shining black tergite between 5th tergite and cerci (?6th tergite)

Pictures did not appear!

Edited by Michael Ackland on 02-06-2014 17:04

Posted by skrylten on 02-06-2014 19:18

#16

Interesting what you can find in a vase (it showed some signs of life when it dried) ...
If the fly came with the flowers its a possibility that it is not from Sweden (we import a lot of flowers from the Netherlands but I don´t know the origin in this case).

I remember the 6th tergite as shining black but only have this poor single photo ( I can take more if it will help).

Can I do more to get further, or is this a "dead end" ?

Posted by javanerkelens on 02-06-2014 20:25

#18

Michael asked me to upload some photos of Pegomya deprimata.
On his opinion it can't be P. deprimata because of the numerous pv-setulae on hind tibia towards apex
Unfortunally I don't have P. deprimata in my collection, so I can't check.......but, I can't see any pv setae on your photos of the hind tibia ??? Or do I need new glasses

Edited by javanerkelens on 02-06-2014 20:39

Posted by skrylten on 02-06-2014 20:43

#20

Michael Ackland wrote:
... The hind tibia in Skrylten's photos have some extra setulae anteroventrally in apical third, which are not present in my deprimata female....

Johanna: Isn´t it av setulae ;)

/Leif K

Posted by javanerkelens on 02-06-2014 20:56

#21

In his mail to me he mentioned pv setulae, but probable he means indeed the av setulae.
But...I also have more specimen with several extra setulae, what they normaly should not have (I even have a Pegomya bicolor with a strong av seta on the midtibia...).
Maybe send this specimen to Ackland, but it will stay a female and with a male more change to get certainty.

Edited by javanerkelens on 02-06-2014 20:56