Thread subject: Diptera.info :: Mycetophilidae > Cordyla sp.
Posted by Stephen R on 10-02-2011 16:32
#1
c.3.5mm Clitheroe UK 8 Feb 2011
Can you do anything from these photos? I think Janet's
Cordyla sp. in the Gallery looks similar.
Edited by Stephen R on 01-03-2011 11:42
Posted by Stephen R on 10-02-2011 16:33
#2
2
Posted by Stephen R on 10-02-2011 16:34
#3
3
Posted by Paul Beuk on 10-02-2011 16:34
#4
It is
Cordyla: the combination of antennal shape and enlarged palps is characteristic.
Posted by Stephen R on 10-02-2011 16:36
#5
Thanks Paul :)
Posted by oxycera on 26-02-2011 18:15
#6
So what are the critical features observable from these images?
Posted by Gnats2meetu on 26-02-2011 18:55
#7
Pretty much what Paul said, Enlarged palpal segments and incomplete M2 vein. Costa does not go beyond R5 and distinctive colouration. The antennal segments counts 11 segments, judging from photo 1.
C. brevicornis sp. has 10 in the male whereas the female has 9 as far as I remember. I'm open to correction of course :-) :D
Posted by oxycera on 26-02-2011 19:16
#8
Hi Rob,
I'm just wondering if you had any inside info on pseudomurina, since I am not familiar any paper on this species.
John
Posted by Stephen R on 27-02-2011 22:23
#9
Thanks Rob, I'm impressed that you can determine the species from these duff photos - especially as it seems to be a newly described one. (I found one reference to 'Cordyla pseudomurina Kurina in press' on Google.)
Stephen
Posted by Gnats2meetu on 01-03-2011 11:26
#10
Hi Stephen, Just looking at it again, I can't be certain unless I see the genitalia. Oxycera is correct it would be a leap of faith! but its not C. crassicornis as M2 does not reach wing margin. Palpal segments are darkened so it is definitely not C.flaviceps, C.fasciata or C.parvipalpus that has yellowish brown palpal segments. The stem of M fork is more than 2.5 times as long as rm so it isn't C. fusca. I don't think it's nitidula as the CU fork base is slightly before the M fork. . C. semiflava males have 13 antennal flagellomeres whilst the females have 9. That leaves pusilla, murina, insons, fissa
and pseudomurina. It gets a bit hazy after this in all honesty and making clearcut distinctions is based on visual which is inconsistent depending on lighting etc. I think Oxycera will agree, Apologies.:) :)
Edited by Gnats2meetu on 01-03-2011 11:27
Posted by Stephen R on 01-03-2011 11:41
#11
Many thanks for giving this so much attention, Rob :) As you can see from the photos, the fly wasn't hanging around to be caught, and I had no net. It's excellent to have it narrowed down to a group of species, and I'll look out for a specimen - though this is the only one I've got close to with the camera so far.
Stephen.