Thread subject: Diptera.info :: Chironomus (Camptochironomus) cf. tentans, northern Norway
Posted by Geir79 on 07-02-2012 18:42
#1
This is one of about 20+ species of Chironomidae I've photographed in 2011.
Maybe Chironomidae is not possible to identify from photos? Will try this one though, much bigger than other Chironomidae I've seen, maybe it makes it easier...
Size is approx. 10-11 mm, photographed in Bodø, northern Norway. Seemed to be swarming around small, shallow pounds, close to the ocean. Date is 10.06.2011
Edited by Geir79 on 07-02-2012 23:47
Posted by Geir79 on 07-02-2012 18:43
#2
Second (this is probably another individual! hope they are the same species)
Posted by John Carr on 07-02-2012 18:48
#3
Chironomus (Camptochironomus). It does not look like
C. tentans but could be a color variant. I am not familiar with the other described European species
C. pallidivittatus (Holarctic; type locality North America). A dorsal closeup of the male genitalia may distinguish them.
Edited by John Carr on 07-02-2012 18:48
Posted by Geir79 on 07-02-2012 18:59
#4
Close up from the second photo (not collected any Chironomidae, don't have the literature to identify them).
It's the highest resolution possible with my 105 mm lens...
Posted by John Carr on 07-02-2012 19:27
#5
More likely
Chironomus tentans.
This is
C. dilutus which is reliably distinguishable from
tentans only by range or cytology:
In
C. pallidivittatus the triangular lobes on either side of the anal point are about as long as their basal width. In
C. tentans they are less than half as long as their basal width.
See also:
http://www.geneti.../Sp2l.html
After further reading, I'm not sure whether the European species called
pallidivittatus is in fact the same as the North American variant given that name by Malloch. See:
http://www.spring...088w51x64/ (if only for the editoral comment after the abstract).
Posted by Geir79 on 07-02-2012 20:07
#6
Sounds a bit complicated... I've looked up Chironomus pallidivittatus in Fauna Europaea (http://www.faunaeur.org/full_results.php?id=407370), the European and the North American is not the same species...(?)
Would Chironomus (Camptochironomus) sp. be the safest ID, or could I write Chironomus tentans in my notes? Only doing this on a hobby basis, not as research.
Posted by John Carr on 07-02-2012 23:32
#7
It's probably tentans. Call it
Chironomus (Camptochironomus) cf.
tentans if you like.
For the taxonomic history, see Spies and Saether 2004:29-32
http://www.mapres...t00752.pdf.
Posted by Geir79 on 07-02-2012 23:46
#8
Thank you!