Diptera.info

Posted by Carnifex on 14-09-2018 20:32

Hi,

my camera just managed to focus on the mirror image, but hope ID is possible nevertheless.
Psila fimetaria?

inaturalist-open-data.s3.amazonaws.com/photos/24882717/large.jpeg

inaturalist-open-data.s3.amazonaws.com/photos/24882717/large.jpeg

inaturalist-open-data.s3.amazonaws.com/24882721/large.jpeg

Cheers,
Lorin

Edited by Carnifex on 19-10-2022 08:19

Posted by Paul Beuk on 18-09-2018 11:33

Looks quite delicate for Psila, so it might be one of the pale Chamaepsila, but difficult to say without indication of size.

Posted by Carnifex on 19-11-2018 16:27

I am now very confident that Paul is right in his opinion that this is a Chamaepsila species. Eye shape, apparently two dc pairs exclude Psila.

I have a species list of Chamaepsila for Austria that comprises 16 species. It doesn't include Ch. lutea (is that a valid species?) and I don't have information about the characters of Ch. andreji, so I am left with 3 species having a yellow thorax and abdomen: Ch. obscuritarsis, Ch. pallida & Ch. rufa.

I am almost certain I can see two dc pairs (which also excludes Psila), which leaves me with Ch. pallida. Also the third antennal segment is darkened, which is ok for Ch. pallida (according to HENNIG; I don't have new literature).

Is anyone with me? :S

Cheers,
Lorin

Posted by Ectemnius on 19-11-2018 19:08

Hi Carnifex,

Besides the extra pair of dorso-centrals Psila lack post-vertical bristles.

For a definitive species ID I'd need to know scutellar bristles, how many verticals (vt) are present. The ID looks to be a female C. pallida indeed. To be sure I'd have to examine the specimen...

Greetings,

Ectemnius

Posted by Jocelyn Claude on 18-10-2022 15:04

Hi! My apologies to all, I was completely wrong... It can't be Cha obscuritarsis either! Even if some parts of the images are blurred, there are not two pairs of sc but only one on this specimen. So we are back to the pallida group (the key of Shatalkin & Merz, 2010 applies for this group) : Mesonotum entirely yellow/Subscutellum yellow/Abdominal tergites yellow. Palpus yellow, or narrowly brownish apically/Postpedicel mainly yellow, with a darkened dorsal margin ((not yellow as pallida) + Setae on head and thorax brownish yellow (not yellow light as pallida) => Chamaepsila luteola (Collin, 1944)