Diptera.info

Posted by Cranefly on 20-01-2010 12:03

I discovered this aquatic larva in May in very quick stream (1 m/s) inside algae. I made photo of alive larva and then tried to rear it. No success of course. No larger larvae or pupae in this place or in wet moss around the stream. Smolensk region.
The question is - is it possible to determine it?
The second - how to rear aquatic larvae in this case?

Edited by Cranefly on 23-01-2010 11:37

Posted by Paul Beuk on 20-01-2010 12:27

Resembles some of the Tipula larvae in the forum here. Sorry, but I don't have any key here atm. Perhaps atylotus can tell you.

Posted by rvanderweele on 20-01-2010 13:11

Sorry, for me it is not clear where it has been collected. In Europe? Where in Europe? I have some literature about Tipulidae larvae. If it is European I will have a look this evening.

Posted by Paul Beuk on 20-01-2010 13:33

Smolensk region (as stated above) can be found in Russia, near the border with Belarus: Google Maps

Posted by rvanderweele on 20-01-2010 13:39

Yes, Paul, you are right. I didn`t check last message well. I just noticed on the earlier message no location was mentioned. I`ll see what I can do.

Posted by rvanderweele on 20-01-2010 19:27

Well, I put myself in a good mess. When I looked at the photo I thought I recognized the type. Well, if that is so, then it is Nephrotoma, but this is most unlikely, since you found it in a very moist environment.
You have more photo`s of the segments of the thorax?

Posted by Cranefly on 21-01-2010 08:59

Sorry, this was the only one which perished later.

Posted by Paul Beuk on 21-01-2010 09:31

Checking Theowald's work (1957) I agree that Nephorotoma seems to be the best candidate.

Posted by atylotus on 21-01-2010 09:50

#10

I agree with the option of being it a Nephrotoma. Although this is more of a terrestrial genus, but maybe it is washed with the moss growing on the banks? Looking at the drawings in Theowald (1967) it may also be a T. (Oreomyza) spec. which resembles Nephrotoma larvae. You have to check the presence or absence of a thickened ridge along the anterior margin of the prothorax. But also this subgenus is not amphibious.

Posted by Cranefly on 21-01-2010 10:00

#11

Never supposed it to be Nephrotoma because found it in water. This stream is beginning from a dem with regulation water mechanism and the level of water changes frequently from complete absence to rapid wide stream.
Many thanks.
I'll try to check the other characters in spring

And how to get imagoes from such larvae? Imposiible?

Posted by Cranefly on 23-01-2010 11:36

#12

Close to Nephrotoma analis larva, but no emerged imago, no larval material to compare, so it is only assumption