Thread subject: Diptera.info :: Chaoborus ID
Posted by solito de solis on 22-02-2017 21:05
#1
Hey dipterists
I have difficulties to determinate this larva
Collected and observed in a pond in Wallonie, Belgium
Size 7 mm length
Here are the pictures I have made extracting them from video file
It could be
C. obscuripes or
C.nyblaei
merci beaucoup
Edited by solito de solis on 22-02-2017 21:06
Posted by solito de solis on 22-02-2017 21:21
#2
Posted by Tony Irwin on 23-02-2017 12:46
#3
It's difficult to see the mandibular teeth in these photos, but it looks like they are extensively darkened, more than I would expect in
flavicans. There appear to be 21 anal rays, so that would suggest this is
crystallinus, rather than
obscuripes.
Edited by Tony Irwin on 23-02-2017 12:46
Posted by solito de solis on 24-02-2017 10:32
#4
Hello Tony
thanks for your answer.
As I try to not kill the animals, it's sometimes difficult to collect the right feqtures. I have observed another specimen from the same sample
and I had success to make these pictures.
Would you please help more ?
Thank you
SDS
Posted by Tony Irwin on 24-02-2017 15:58
#5
The last photo is excellent, and clearly shows the small central tooth firmly on the side of the larger one. this is typical of
crystallinus and
obscuripes, but excludes
flavicans. The number of setae in the mandibular fan is unclear, but appears to be at least 12 so this might be
obscuripes. It's not uncommon to have both species in the one pond.
Posted by solito de solis on 25-02-2017 00:41
#6
Thank you Tony
merci beaucoup
video will follow