Thread subject: Diptera.info :: Muscidae ID

Posted by Luis Alvarez on 14-08-2016 10:24
#1

I think another Helina (f), similar to
http://www.diptera.info/forum/viewthread.php?thread_id=75094
but with less yellow legs, three hairs in the middle tibia (not two)... and it seems that more strongly infuscated cross veins.
Galicia (Spain), 04/06/2016.
Best regards,
Luis

Posted by oceanlis2000 on 15-08-2016 10:49
#2

With Helina it is necessary to add a few more photos to show

Number of stpl setae
Radial node on ventral side of wing
A good view of the thorax to see pre and post ac, both sides
and a close up of the arista

Posted by Stephane Lebrun on 15-08-2016 11:37
#3

oceanlis2000 wrote:
With Helina it is necessary to add a few more photos to show

Number of stpl setae
Radial node on ventral side of wing
A good view of the thorax to see pre and post ac, both sides
and a close up of the arista


It's true.
The sternopleural (katepisternal) setae are well visible and 1+2. The arista seems bare. The prac are not necessary, since they only concern H. impuncta and H. quadrinotata which don't match at all in any case.
When you can't see some critical details, you can always speculate with these details (if they are not too numerous) to see where the key leads you :
the problem is that, for this species, if you assume that the radial node is setulose, you end up with the consimilis/fratercula/vicina/simulatrix/pollinosa group, where none of these really matches (some should have black femora, other a different chaetotaxy on legs or an unspotted abdomen etc.), and if you assume the radial node is bare, you end up to Helina impuncta/depuncta, which is also improbable.
I answered for this similar one : http://www.dipter...d_id=75094. So this one is still a mistery.
Probably a complex group to be revised.

Posted by Luis Alvarez on 15-08-2016 18:25
#4

Thank you very much to both.
The arista seems pubescent, or not?
Best regards,
Luis

Posted by Luis Alvarez on 15-08-2016 18:26
#5

Photo 2

Posted by Stephane Lebrun on 15-08-2016 21:45
#6

Yes, pubescent. Pubescent or bare is the same for keys. Thanks for the additional pictures.

Edited by Stephane Lebrun on 15-08-2016 21:46

Posted by oceanlis2000 on 18-08-2016 14:59
#7


Hi Luis

Can you give me a bit more info

1. A photo of the radio-cubital node on the ventral side of the wing - close up we do need to see if any setulae are present
2. Femur 2 I need to see the number of v setae, whole view of femur and then basal 1/2
3. A close up of the prescutum just to check no preac, I'm not expecting any

Thanks

Posted by Luis Alvarez on 19-08-2016 19:28
#8

Hello Elisabeth,
I am sorry. I have only bad photos of what you need and the point 1 I do not have any.
Thanks for your interest.
Best regards,
Luis

Edited by Luis Alvarez on 19-08-2016 19:31

Posted by Luis Alvarez on 19-08-2016 19:29
#9

.

Posted by Luis Alvarez on 19-08-2016 19:30
#10

.

Posted by oceanlis2000 on 22-08-2016 14:54
#11

Thanks Luis, it moves things forwards,

I do need to have a photo of the radio-cubital node on the ventral side of the wing

Can you do this?

Posted by Luis Alvarez on 23-08-2016 15:09
#12

Hello Elisabeth,
I don't have any picture ( and the fly was not collected ). Sorry
Best regards,
Luis

Edited by Luis Alvarez on 23-08-2016 15:09

Posted by oceanlis2000 on 25-08-2016 10:56
#13

OK

I'll give it one more go with this

There are perhaps a few more things that can be done to narrow it down

Photo of scutum to show number of post dc - probably 3?

The photos of the arista are not from the same fly (1 has 2 arista, the other 1 broken can you remove the one that doesn't belong to the above fly)

Close up of the pra seta

Photo of tibia 3 to show of there is a pd in the basal 1/4-1/5th

Photo of the abdomen to see how large the spots are, how visible

Photo of the scutellum to show the length of the preapicals and apicals


As Stephane said there are a few species it could be it can be narrowed down!

Posted by Luis Alvarez on 28-08-2016 10:16
#14

The photos of the arista are same fly. I´m sure. It is an optical effect (caused by the different angle of head). See for yourself in these two images

Edited by Luis Alvarez on 28-08-2016 10:25

Posted by Luis Alvarez on 28-08-2016 10:17
#15

Photo 1

Posted by Luis Alvarez on 28-08-2016 10:18
#16

and photo 2

Posted by Luis Alvarez on 28-08-2016 10:19
#17

.

Posted by Luis Alvarez on 28-08-2016 10:20
#18

.

Posted by oceanlis2000 on 05-09-2016 10:13
#19


I get these 3 species: vicana, consimilis, fratercula


if there is a pd seta in basal 1/4 of tibia 3 = fratercula


if not ,consimilis and vicana can be identified by the size of the spots on tergite 3, a clear shot is needed to see size in relation to tergite length

Posted by Luis Alvarez on 13-09-2016 10:50
#20

Thanks Elisabeth.
I think no pd seta.
Best regards,
Luis

Posted by Luis Alvarez on 13-09-2016 10:54
#21

.