Posted by Stephane Lebrun on 15-08-2016 11:37
#3
oceanlis2000 wrote:
With Helina it is necessary to add a few more photos to show
Number of stpl setae
Radial node on ventral side of wing
A good view of the thorax to see pre and post ac, both sides
and a close up of the arista
It's true.
The sternopleural (katepisternal) setae are well visible and 1+2. The arista seems bare. The prac are not necessary, since they only concern
H. impuncta and
H. quadrinotata which don't match at all in any case.
When you can't see some critical details, you can always speculate with these details (if they are not too numerous) to see where the key leads you :
the problem is that, for this species, if you assume that the radial node is setulose, you end up with the
consimilis/fratercula/vicina/simulatrix/pollinosa group, where none of these really matches (some should have black femora, other a different chaetotaxy on legs or an unspotted abdomen etc.), and if you assume the radial node is bare, you end up to
Helina impuncta/depuncta, which is also improbable.
I answered for this similar one :
http://www.dipter...d_id=75094. So this one is still a mistery.
Probably a complex group to be revised.