Thread subject: Diptera.info :: Drosophilidae: Stegana (Steganina) mehadiae; female
Posted by helge on 30-08-2021 08:34
#1
Austria, June.
Thank you for your help!
Helge
Edited by helge on 30-08-2021 14:55
Posted by helge on 30-08-2021 08:34
#2
2
Posted by helge on 30-08-2021 08:35
#3
3
Posted by Jan Willem on 30-08-2021 10:49
#4
Looks like Drosophilidae:
Stegana spec.
Posted by Jan Willem on 30-08-2021 10:53
#5
Jan Maca may be able to help.
Posted by Jan Maca on 30-08-2021 12:18
#6
I would stay at the (sub-) generic determination, If it is a large fly (some 5 to 6 mm), then it should be S mehadiae, but it seems me to belong to the cluster of smaller species.
Edited by Jan Maca on 30-08-2021 12:19
Posted by Jan Willem on 30-08-2021 12:28
#7
Thank you for the quick response Jan!
Maybe Helge can give some additional info on the measurements.
Posted by helge on 30-08-2021 13:51
#8
Thank you very much Jan & Jan!
I found a second specimen preserved in alcohol, same spot, same time.
Both flies are about 5 mm (see additional photos).
I just looked up the key of Bächli & Burla 1985 and it keys out Steganina (?) nigrithorax. S. mehadiae is not listed for Switzerland; but I do not know if it could occour in Austria. What do you think?
Helge
Edited by helge on 30-08-2021 13:53
Posted by helge on 30-08-2021 13:54
#9
a
Posted by helge on 30-08-2021 13:54
#10
b
Posted by Jan Maca on 30-08-2021 14:46
#11
Good job! Wide gena and numerous lines of acrostichals, as well as the size of flies, show that it is S. mehadiae. I had seen two flies of this species in the old collection of Museum Vienna, with locality only "Austria"
(quoted also by Baechli, G., 1988: Die Drosophiliden-Arten (Diptera) in der Sammlung des Naturhistorischen Museums Wien. Annln naturh. Mus. Wien 90b:131-148).
No other records from Austria, as far as I know.
Posted by helge on 30-08-2021 14:53
#12
Wonderful, thank you very much - also for the additional information!
Helge:)