Diptera.info :: Identification queries :: Diptera (adults)
 Muscidae: Helina pertusa
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| Liancalus |
Posted on 12-12-2013 20:02
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Member Location: Posts: 120 Joined: 07.12.13 |
7mm. Southern England, October 2012. Keyed ok as far as 4 rows as presutural acrostichals, then with less confidence to pertusa (dead end as genitalia wrong and hairs on hind femora not dense or short enough). Is it even in this genus (no posterodorsal around basal third of hind tibia).
Liancalus attached the following image:  [70.89Kb] Edited by Liancalus on 13-12-2013 21:22 |
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| Liancalus |
Posted on 12-12-2013 20:04
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Member Location: Posts: 120 Joined: 07.12.13 |
Dorsal view.
Liancalus attached the following image:  [34.73Kb] |
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| Liancalus |
Posted on 12-12-2013 20:05
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Member Location: Posts: 120 Joined: 07.12.13 |
Genitalia.
Liancalus attached the following image:  [59.37Kb] |
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| Stephane Lebrun |
Posted on 13-12-2013 19:42
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
Helina pertusa seems a good ID. 
Stephane. |
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| Liancalus |
Posted on 13-12-2013 21:20
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Member Location: Posts: 120 Joined: 07.12.13 |
Ah thank you Stephane, looking at the genitalia in lateral view the evenly concave lower edge of the cercal plates is a good fit and doesn't seem shared by many other Helina. Oh to have more confidence when naming these.
Edited by Liancalus on 13-12-2013 21:21 |
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| oceanlis2000 |
Posted on 23-12-2013 11:23
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Member Location: Wales, UK Posts: 570 Joined: 15.06.10 |
Hi Liancalus also need to check that pra is shorter than 2nd ntpl seta and 2:2 stpl setae A close up of these would be useful to confirm and for the gallery With Best Wishes Dr Elisabeth A. Harris @FloraConsUK |
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| Liancalus |
Posted on 23-12-2013 21:09
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Member Location: Posts: 120 Joined: 07.12.13 |
Thanks for the feedback Elisabeth. I can confirm pntpl > pra and stpl 2 +2. Unfortunately I don't think I can produce worthwhile images of these features with my current lighting and camera set-up (holding compact to eyepiece, trying not to shake too much). |
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| oceanlis2000 |
Posted on 24-12-2013 11:03
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Member Location: Wales, UK Posts: 570 Joined: 15.06.10 |
You have some really good flies here for us to see so thanks very much, it's fun to play along too especially with some of the rarer ones
Dr Elisabeth A. Harris @FloraConsUK |
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| Liancalus |
Posted on 24-12-2013 23:41
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Member Location: Posts: 120 Joined: 07.12.13 |
Thank you Elisabeth, that is good. I have been very pleased to find other people interested in Muscids on this forum. I have only previously collected these incidentally while doing other things. Help here has been invaluable in making progress and I will be paying them more attention in the future (Phaonia subventa in sunny weather today). |
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