Posted by blowave on 17-07-2011 18:34
#1
Hi,
I have keyed this as in the title, subfamily Chioneinae, genus Gonomyia (Gonomyia). The keys don't go further than that but if it can be confirmed I can put this in the gallery as we don't have any Gonomyia sp. there.
Length of wings ~7.5mm
Janet
Posted by JSalmela on 17-07-2011 18:57
#4
This is very pale specimen. If it is Gonomyia, it must be teneral one. Rhabdomastix is also possible (based on habitus), species of that genus usually live in sandy streams.
-Jukka Salmela
Posted by blowave on 17-07-2011 19:49
#5
Jukka Salmela wrote:
This is very pale specimen. If it is Gonomyia, it must be teneral one. Rhabdomastix is also possible (based on habitus), species of that genus usually live in sandy streams.
-Jukka Salmela
Thank you Jutta for alerting me to the possibilty of it being Rhabdomastix.
I have rechecked the keys, the couplet which would lead me to Rhabdomastix states:
Rs as long as or longer than half the length of the upper basal cell; about as long as veins R3 and R4+5.
I took the alternative route, which states:
Rs shorter than half the length of the upper basal cell; shorter than veins R3 and R4+5
I think I took the correct route. :)
The next step took me to one where vein R is absent and the discal cell is rectangular (not triangular).
The last step where the first two flagellar segments are longer than the pedicel (not the same length combined); body with brighter yellow areas including parts of the pleurae and usually sides of the top of the thorax in front of the wing.
Is this correct?
Posted by JSalmela on 18-07-2011 08:05
#6
I put some photos of Gonomyia and Rhabdomastix in my web site. I would like to see your specimen (in vitro) to be sure about the identification.
https://sites.google.com/site/cranefliesoffinland/crane-fly-photos
-Jukka Salmela
Posted by blowave on 18-07-2011 13:53
#7
Thank you Jukka, I found your photos. The Rs vein on your specimen of Rhabdomastix is very long as stated in the keys.
The Rs vein on your Gonomyia specimen is short, so I am happy that this is Gonomyia. The veins on my photo can be seen sufficiently to tell. I have marked out the vein in red..