Diptera.info

Posted by kuv on 25-08-2017 14:17

Northern Germany, Mecklenburg-Vorpommern, Zingst, coastal area, at the edge of a small forest between the beach and dyke, at leaves of oaks; Outsidephotos: kuv, 23th/24th of August 2017. Is my idea ok? Please help to get the ID.
kuv

Edited by kuv on 08-09-2017 11:11

Posted by Nosferatumyia on 03-09-2017 19:21

Two first are Noeeta biseta Merz, 1992, two last -- possibly Noeeta pupillata Fallen, 1814. Third is unclear. Species can occur sympatrically.

Posted by kuv on 04-09-2017 13:30

Thank you very much Valery - :)
I hope I checked it right:
• N. bisetosa, Merz, 1992, for the fly in the first picture (it's only one fly in four different positions)
• possibly N. pupillata, Fallen, 1814, for the fly in my last two pictures (third specimen)
• and my second specimen is unclear.
Best regards
Kuv

Edited by kuv on 04-09-2017 13:31

Posted by Nosferatumyia on 04-09-2017 15:33

exactly. The difference (along with different Hieracium species as host plants) is the presence of the pre-sutural dorsocentral seta (in front of the transverse suture) in biseta.

Posted by Fred Fly on 05-09-2017 06:50

#10

Dear Valery,
I’m very sorry to disagree you. First I wondered that I’m living 120 km from Zingst and have never found N. bisetosa while only N. pupillata is quite frequent here in dunes at Baltic coast. There is no record of this species from whole Germany, Denmark (50 km from Zingst) or Scandinavia as far as I know. For this reasons I compared kuv pictures with my material of N. bisetosa. I’m unable to identify or interpret a pre-sutural dorsocentral seta, a black base of frontal supraalar seta, or a single black hair on frons on any picture. In addition all specimens showing a darkened area in R2+3. These characters and the distribution making it more reliable that all pictures showing only one species: N. pupillata.
Regards
Piet

Posted by Nosferatumyia on 05-09-2017 19:06

#11

Neither agree or disagree. The ID based on the field pictures must be veryfied by a captured material, or better REARED.
N. bisetosa (sic! I have made a typo) is rather common everywhere along with Hieracium piloselloides and possibly H. pilosella, so both the better resolution pictures, which clearly show the presutural dorsocentral seta or / and the host plant picture are needed.

Posted by Fred Fly on 07-09-2017 09:12

#12

Unfortunately Hieracium piloselloides is extinct in Schleswig-Holstein, extremly rare in Mecklenburg-Vorpommern and so far never recorded from Zingst. There is only one single record of this plant from German Baltic coast (in 1985 http://www.floraweb.de/webkarten/karte.html?taxnr=2924). Another reason that my vote is going for N. pupillata only.
Very best regrads
Piet

Edited by Fred Fly on 07-09-2017 09:13

Posted by Nosferatumyia on 07-09-2017 09:27

#13

we still know its biology and the host plant range very poorly, as well as the whole "host race" population structure in Europe. A hypervariable genus with numerous host plants will bring us many surprises after more or less detailed molecular studies.
In this particular case ID is still pending.

Posted by kuv on 08-09-2017 11:10

#14

Thank you both, Valery and Piet, for your engagement to identify "my" flies. So it's remains to Genus Noeeta.
Greetings Kuv