Thread subject: Diptera.info :: Heleomyza
Posted by John Bratton on 31-03-2015 16:52
#1
This was collected 27 March 2015 on a dead rodent in a small rocky wet heath within birch woodland, Llandegfan Common, SH577750, North Wales, UK. Can anyone confirm it as Heleomyza serrate, and not captiosa, please?
Posted by John Bratton on 31-03-2015 16:52
#2
Here is the critical bit.
Thanks,
John
Edited by John Bratton on 31-03-2015 16:53
Posted by John Bratton on 31-03-2015 16:53
#3
And the habitat
Posted by John Bratton on 31-03-2015 16:54
#4
And the best bit
Posted by oxycera on 31-03-2015 17:07
#5
I have figures of the two (I can check the source if necessary), which
strongly suggest that yours is captiosa.
Posted by John Bratton on 31-03-2015 17:11
#6
Thanks. I was going by the figures in Gorodkov 1988.
I see the British checklist suggests they may not be distinct species.
Posted by oxycera on 31-03-2015 18:46
#7
I was looking at Gorodkov also.
Perhaps it is more 'banana' like than 'hockey stick' like (Dr Woznica's
words). That would make it serrata; hopefully he will comment on your post. See thread from 04.04.2010 if you haven't seen it.
Posted by Andrzej on 01-04-2015 13:33
#8
No doubt it's H.
captiosa ;). Andrzej
Posted by oxycera on 01-04-2015 19:59
#9
Excellent.
Posted by John Bratton on 02-04-2015 17:18
#10
Thanks for that, Andrzej. But I have to say I am surprised. As well as the shape of the surstylus, the size of the epandrium looks a much better fit to Gorodkov's serrata. What leads you to captiosa?
I have a photo at home that I took from Diptera.info of a captiosa surstylus, from Berlin by Ralph Sipple, which is a close fit to Gorodkov's captiosa and different from my photo. For some reason, I can no longer find that post on Diptera.info, but I can repost the photo to this thread if that is allowed. But it will have to be after Easter.
John
Posted by empeejay on 02-04-2015 21:53
#11
The 2 threads below should clear things up.
Heleomyza captiosa
Heleomyza serrata
However, it does seem that the British specimens in the current thread and
this one, are somewhat intermediate.
Edited by empeejay on 02-04-2015 22:23
Posted by Andrzej on 03-04-2015 07:50
#12
Hi! realy interesting. I'm not sure about the species level of the last one mentioned here:
http://www.dipter...d_id=29024. It's not excluded that the species could be a species which is described in North America. Andrzej
Posted by John Bratton on 10-04-2015 16:28
#13
Back from Easter.
The link to H. captiosa that empeejay has posted above is the thread I mentioned on 2 April. I don't know why I couldn't find it.
There do seem to be three forms of surstylus here. More than two species, or one very variable one?
John