Thread subject: Diptera.info :: Parydra coarctata (cf), Ephydridae, May 28, 2021, near Budapest, Hungary?
Posted by Xespok on 31-05-2021 21:02
#1
Is this Pardyra sp? If so, possibly not identifiable to species.
Edited by Xespok on 01-06-2021 07:10
Posted by Xespok on 31-05-2021 21:07
#2
Another image.
Edited by Xespok on 31-05-2021 21:32
Posted by Tony Irwin on 31-05-2021 23:30
#3
It is
Parydra, possibly
coarctata, but difficult to be sure.
Posted by Xespok on 01-06-2021 07:09
#4
I tried to run this through the key written by Papp L. P. coarctata should typically have a small side branch to r2 and r3 which should be visible in the second picture (see also later). However, I do not see it. P. quadripunctata can also be ruled out for the same reason. P. nubecula should have a more dusted frons, and it is rare in Hungary, so this can be ruled out. P. aquila does not have a patterned wing, which this fly clearly has. The wing veins are not wavy, which rules out undulata, which is yet to be recorder in Hungary. Then, if I see correctly this fly has 3 dc, which rules out cognata. So we are left with coarctata (it seems after all that the side branch to r2 and 3 is not always there, especially in females). The fly was largish (for an Ephydrid), and the r2and3 is quite lomng in relation to r4and5. So coarctata is likels.
Posted by Tony Irwin on 01-06-2021 09:26
#5
The presence or absence of the appendix (side branch) of r2+3 is very variable among most species of
Parydra - I regularly see specimens with the appendix on one wing, but not the other!