Diptera.info :: Identification queries :: Diptera (adults)
 Rondania (dispar?) from northern Spain
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| ChrisR |
Posted on 07-10-2009 22:21
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 Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
This was sent to me from Galicia, Spain today and I was wondering if it might be a female Rondania dispar? Are there any other alternatives? 
ChrisR attached the following image:  [53.77Kb] Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| ChrisR |
Posted on 07-10-2009 22:21
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
another angle ...
ChrisR attached the following image:  [49.07Kb] Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| ChrisR |
Posted on 07-10-2009 22:21
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
another angle ...
ChrisR attached the following image:  [46.03Kb] Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| neprisikiski |
Posted on 08-10-2009 18:07
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Member Location: Lithuania Posts: 876 Joined: 23.02.09 |
should be dimidiata, tibiae are dark
Erikas |
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| ChrisR |
Posted on 08-10-2009 18:19
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Ahh, excellent - thanks Which literature are you using? Is there anything better than the Central European key? Interstingly, mine keyed to R.cucullata in the main key because it has 2 ia and they are wider apart than the distance of the anterior one to the suture. Might be a weak couplet that needs a margin note.
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Zeegers |
Posted on 13-10-2009 20:22
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Member Location: Soest, NL Posts: 19299 Joined: 21.07.04 |
The colouration of the legs is unreliable, at least in the dutch material I've seen. The relative length of the stalk might be a better feature to use. Theo |
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| ChrisR |
Posted on 13-10-2009 20:29
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Thanks Theo - I have made a margin-note and have just checked the length of the petiole. It is <0.24x (actually just <0.2x) the length of the median vein after the bend so I think that confirms R.dimidiata
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| ChrisR |
Posted on 11-06-2010 15:27
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
As a follow-up - the original determination of Rondania dispar has been confirmed by Peter Tschorsnig (it is definitely not R. dimidiata) Peter said: the key in Herting & Tschorsnig is insufficient, because the length of the petiole and the colouration of the tibia overlap in the two species, but R. dimidiata has nearly always 4 postsutural dc and R. dispar has 3; unfortunately also the latter feature is not entirely constant, because one of the two specimens from Ourense has 3 dc at one side and 4 dc at the other
Edited by ChrisR on 11-06-2010 15:29 Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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