Thread subject: Diptera.info :: Muscidae: Spilogona solitariana (male).
Posted by Stephen R on 10-06-2011 00:05
#1
4-mm, Clitheroe UK, 9 June 2011
Using the key and genitalia diagrams in Gregor, I arrived at
S. solitariana. Does this look OK? I will do more photos of the specimen tomorrow if you have specific requests.
Edited by Stephen R on 10-06-2011 20:07
Posted by Stephen R on 10-06-2011 00:06
#2
2
Posted by Stephen R on 10-06-2011 00:07
#3
3
Posted by Stephen R on 10-06-2011 00:09
#4
4
Posted by Stephen R on 10-06-2011 00:10
#5
I have replaced this with a better image.
Edited by Stephen R on 10-06-2011 18:33
Posted by Stephane Lebrun on 10-06-2011 10:56
#6
Stephen, you are better placed than us to confirm or not. The more difficult with this hard genus is to judge of the presence of supplementary setae on anepisternum (at least the first time), or the dusting of the prementum and some things like this. So finding males helps with the examination of the genitalia. It certainly looks like a
Spilogona, and the visible characters don't go against your ID... ;)
Posted by Stephen R on 10-06-2011 12:57
#7
Thanks Stephane. I did have difficulty deciding about the supplementary setae as there were some moderately well-developed hairs in the area; I followed the key both ways and the alternative route led to
S. meadei. There are no elongated pvs on f3 and no sign of infuscation on the wings, and the genitalia didn't match, so I decided the hairs didn't count as setae. The genitalia match for
S.solitariana looks very convincing. I'll see if I can make some better photos for the record.
Posted by Stephen R on 10-06-2011 18:36
#8
Cercal plate. Do you have any tips for hooking out the terminalia without damaging the cerci?
Edited by Stephen R on 10-06-2011 18:36
Posted by Stephen R on 10-06-2011 18:41
#9
Anepisternum. It seems to be a question of whether the arrowed pore belongs to a strong hair or a weak seta. I wasn't helped by confusing reflections in the pin!
Posted by Stephane Lebrun on 10-06-2011 19:59
#10
For the genitalia, I use pins or micropins, and patience. With the new profile view of the cercal plates/surstyles I am convinced it is the right ID.
For the anepisternal bristle row, can't you look the other side ?
Posted by Stephen R on 10-06-2011 20:05
#11
Thank you again Stephane :) I did look at the other anepisternum - it's very similar, and the pin came through in the same place! Here's the photo:
Posted by Stephane Lebrun on 10-06-2011 20:15
#12
If no long hair found between the first strong upper seta and the second strong one, we can consider it without supl. seta. I don't think they can be both broken.
Posted by Stephen R on 10-06-2011 20:24
#13
I can see why you need some experience to judge these confidently :D