Diptera.info

Posted by Jan Wind on 22-07-2016 14:54

Seen 18 july 2016 on leaves of maple regrowth in dry area (N.P Hoge Veluwe) in the Netherlands. Azelinii?
Any help with finding ID much appreciated.

Edited by Jan Wind on 23-07-2016 22:00

Posted by Jan Wind on 22-07-2016 18:22

with Gregor. F et all (2002) Muscidae of Central Europe I have arrived at Hydrotaea cyrtoneurina as halters black, wings clear, eyes densely haired, mid tibia no AD, parafacial widt about same as width flagellomere, hind femur no ventral spine, and chaetotoxy on hind tibia and mid tibia as described for H. cyrtoneurina ...unless there is a related Hydrotaea species for this part of Europe which not occurs in Central Europe and which also fits the description.
Is my conclusion correct??

see image hind leg

Edited by Jan Wind on 22-07-2016 18:23

Posted by oceanlis2000 on 26-07-2016 14:36

#10

If you have the specimen it would be useful to know

Number of pre ac setae?
Any white grey dusted vittae on scutum?
Number of av, ad and pv on tibia 3?

I think an ID will then be easier

Edited by oceanlis2000 on 26-07-2016 14:36

Posted by Jan Wind on 26-07-2016 16:09

#11

Thank you for your kind attention.

There are 2 pair of pre-sutural AC;

Dusting on scutum as seen from behind consists of two parallel stripes bordered bij the row of DC, mainly visible pre-sutural and fading out in post sutural part. Also slight dusting on notopleuron and posterial part of humerus.

On hind tibia I see 4 AV (on distal half), 2 AD, and 5 PV and 3+ smaller thinner hairs.

Posted by oceanlis2000 on 29-07-2016 10:16

#12

There should be 6 or more av setae on tibia 3 for cyrtoneurina (+others)

if yes can you give me a photo of the prescutum (dorsal view) and check that there are no ad setae on tibia 2, both sides and if small

Posted by Jan Wind on 29-07-2016 14:50

#13

I will show a picture of tibia 3. I see now clearly 6 AV. I had confused two in the basal half as no AV as they are more ventral directed but I see now that the inplant is at AV.

Posted by Jan Wind on 29-07-2016 14:56

#15

and a picture of the tibia 2 They have no AD on both legs, but there a few tiny tiny short 'AD bristles';
I hope this answer your questions. if needed I can give more information.

Posted by oceanlis2000 on 05-08-2016 10:34

#16

We are now down to 2 species

Next number of p setae on tibia 2 and a photo to see just how hairy the eyes are?

Posted by Jan Wind on 05-08-2016 11:14

#17

Thank you for your continued attention.
Do you mean by p seta only p by excluding pv and pd or all p seta including pv, p and pd?

Posted by Jan Wind on 08-08-2016 18:55

#19

thank you for your reply.
here a picture to show the densely haired eyes

Edited by Jan Wind on 08-08-2016 18:57

Posted by Jan Wind on 08-08-2016 18:57

#20

on tibia 2 there are no ad, no d and only 2 pd
see picture dorsal view of tibia 2

Posted by oceanlis2000 on 15-08-2016 10:14

#21

Hello

The densely hairy eyes now point to H. cyrtoneurina with the British key
Is the thorax a really bluish colour or a trick of the light?

Posted by Jan Wind on 15-08-2016 20:36

#22

Thank you for confirming it is H. cyrtoneurina.
The bluish light is due the led light of the microscope which indeed often gives a too bluish shine.