Thread subject: Diptera.info :: Penthetria funebris (Pleciidae/Bibionidae)
Posted by ebbek on 07-12-2019 15:55
A small larvae (3-4 mm) from a forest, besides a stream, in South Sweden, at the moss Rhytidiadelphus subpinnatus. Maybe Dioma glabrata or some other Cylindrotomidae?
Edited by ebbek on 07-12-2019 20:06
Posted by ebbek on 07-12-2019 15:56
Edited by ebbek on 07-12-2019 15:58
Posted by ebbek on 07-12-2019 16:14
Looks very much as the moss it was found on - an impressing camouflage! It was a friend who found the larvae when he looked att the moss in the microscope to determine it.
Posted by atylotus on 07-12-2019 19:12
No cylindrotomatidae, I think this is Pleciidae and I think there is only 1 species, Pentethria funebris, but not sure though
Edited by atylotus on 07-12-2019 19:14
Posted by ebbek on 07-12-2019 19:54
This Picture of the larvae of that species was in Stuke (2004): "Bibionidae and Pleciidae (Diptera: Nematocera) from Lower Saxony and Bremen (Germany)" and it fits very well to this larvae! In Sweden this species is placed under Bibionidae.
Edited by ebbek on 07-12-2019 20:07
Posted by atylotus on 07-12-2019 20:11
Yes, that him. Rare species.
Posted by ebbek on 07-12-2019 21:42
Interesting - only a few reports from Sweden as far as I can find!
Posted by John Carr on 08-12-2019 17:45
How are larvae of Bibionidae s. str. and Pleciidae distinguished?
Posted by ebbek on 08-12-2019 20:29
There are no Bibionidae in Scandinavia with larvae like this one, they all look something like the Bibio sp. larvae in this photo (from a garden in South Sweden).
Edited by ebbek on 08-12-2019 21:32
Posted by atylotus on 09-12-2019 10:17
besides the much longer abdominal lobes in Penthetria, the number of respiratory openings in the posterior spiracle is different. Based on described species, Penthetria has 1, Bibio 2 and Dilophus has 3 openings.