Thread subject: Diptera.info :: Between Rhagio vitripennis and scolopaceus
Posted by clovis on 08-06-2016 13:53
#1
hi,
I'm looking for differences between those 2 species as I think hairs on metapleuron isn't easy thing to see.
Do you know if coloration of the anterior part of the wing is reliable? Between stigma and apex of wing.
clovis : France : Sainghin-en-Mélantois : 59262 : 21/05/2014
Altitude : 43 m - Taille : 15 mm
Rhagio scolopaceus
Réf. : 163597
clovis : France : Villevêque : 49140 : 16/05/2016
Altitude : 16 m - Taille : 12 mm
Réf. : 163595
Rhagio vitripennis
Posted by Paul Beuk on 08-06-2016 15:49
#2
The darkening in the tip of the wing is not sharply demarkated in
vitripennis but sharply demarkated in both
scolopaceus and
strigosus.
Posted by Zeegers on 08-06-2016 17:02
#3
True, but Clovis is right that it is really tricky.
First of all, always compare males with males and females with females, since females generally have darker wings than males.
Second, the variability in this group is bigger than generally excepted.
Thirdly, your identifications are correct.
Unique for scolopaceus (together with latipennis) is the dark spot below the stigma, at the fork of vein R4+5. This spot is lacking in vitripennis and also in strigosa.
As for your question, I need to look into that. Interesting observation.
Theo
Posted by John Carr on 08-06-2016 17:52
#4
Is curvature of the base of R4 stable within a species?
Posted by clovis on 10-06-2016 22:41
#5
Thanks for your remarks, i didn't notice this spot. Could be a really usefull character. I'll check for the curvation, not sure it is stable, but worth cheking!
Base of this questionning was this specimen (
http://www.diptera.info/forum/viewthread.php?thread_id=73812), a female i first thought about
R scolopaceus due to the large extension of the dark patch, but the shape of dark patch was in favour of
R vitripennis, so i needed other opinion. That would be R vitripennis then.
You largelly answer my question, so thanks! :) (and thank if you check on other specimens, i tested it on only 10 vitripennis. Please tell me about the result)
Posted by Zeegers on 11-06-2016 08:00
#6
Hi Clovis,
Your link is a circular one, probably you ment something else !
Theo
Posted by Zeegers on 11-06-2016 08:02
#7
Your dark anterior margin works excellent in this recent post
http://www.diptera.info/forum/viewthread.php?thread_id=73856
Theo
Posted by clovis on 14-06-2016 19:49
#8
That was the exact post i wanted to show you^^
Posted by Zeegers on 15-06-2016 07:48
#9
Yes, thank you very much for sharing !! I keep checking your feature, and so far 100 % score !!
Theo
