Thread subject: Diptera.info :: chironomid swarming on the water
Posted by mwkozlowski on 14-04-2012 15:48
#1
Yerterday, I observed small, probably flightless hironomid males that swarmed, gliding on the water surface of a small lake in Mazury Poland. Manner of gliding still obscure, since I did not notice any wing vibrations. Any suggestion to the species and to the behavior ?
Edited by mwkozlowski on 14-04-2012 15:52
Posted by mwkozlowski on 14-04-2012 15:53
#2
and...
Posted by mwkozlowski on 14-04-2012 15:54
#3
and..
Posted by John Carr on 14-04-2012 23:15
#4
This must be
Thienemanniola ploenensis, a Chironominae with slightly reduced wings "confined to shallow, still waters" of the western Palaearctic. (Cranston et al. 1989)
Posted by mwkozlowski on 15-04-2012 11:40
#5
Thank you John, in the paper of Gilka and Dominiak (2007) from Fragmenta Faunistica, stays that this sp. is known only from the few European sites so I give coordinates of the place from goole maps: 53.670477,21.212282
Posted by John Carr on 16-04-2012 04:52
#6
I did not know about the similiar species
Corynocera oliveri when I made my ID. Species of
Corynocera also swarm on fresh water bodies. This is not
C. ambigua, a holarctic species (group) which has a more strongly modified wing.
Thienemanniola lacks hairs on the thorax and has a more slender gonostylus.
Corynocera has may have some dorsocentrals and scutellars and has a short, broad gonostylus.
C. oliveri may be a more northern species.
Both genera are in tribe Tanytarsini.