Thread subject: Diptera.info :: Cordyla crassicornis < Mycetophilidae, dark Exechiini
Posted by Carnifex on 15-02-2026 17:32
#1
Lower Austria mid Feb 2026, house wall, about 3.5 mm
Genus or species ID appreciated
Edited by Carnifex on 18-02-2026 15:50
Posted by Walther Gritsch on 15-02-2026 23:22
#2
With the enlarged palpal segment, actually 2nd segment, it is a
Cordyla sp. , male.
I've never seen a species as dark as this one. All the same, a difficult genus.
Posted by Carnifex on 16-02-2026 00:08
#3
Thanks Walther,
as it is a male, it should be identifiable by dissection, I suppose
Posted by Walther Gritsch on 16-02-2026 12:51
#4
Yes, eventually. It often ends with that, but you might count the number of flagellomeres. That number gives a pretty good hint at where to look.
Posted by Carnifex on 17-02-2026 16:57
#5
There should be 11 segments, if I counted correctly:
That would leave us with four species (excluding
fasciata due to the color of the palps):
parvipalpis
fissa
crassicornis
insons
Posted by Carnifex on 17-02-2026 17:37
#6
Unfortunately, I dropped the slide after dissection, so I only can provide this level of magnification by my compound microscope
Posted by Walther Gritsch on 18-02-2026 12:40
#7
Probably, but one should be cautious, it is
crassicornis. If vein M2 reaches wing margin it's as good as certain.
C. crassicornis is the only European species with this feature. To my knowledge ;)
Posted by Carnifex on 18-02-2026 15:50
#8
That's great information - indeed M2 reaches wing margin and I checked photos of
parvipalpis, fissa, insons (given the IDs on GBIF are correct) and all have short M2 veins.
So looking good for
crassicornis :-)