Diptera.info

Posted by Andre Jas on 01-11-2006 20:27

Hi,

I've looked through Frank's site under Chrysomelidae and I think this could be it: Phratora laticollis. I know Chrys. are tough to ID from photo's, but I'll give it a try anyway. Is it?

Andr

Edited by Andre Jas on 03-11-2006 21:22

Posted by Frank Koehler on 01-11-2006 23:56

Hi Andr?,
very good photos with many details, but not enough = missing genitalia ;-) We can exclude a lot of species and have to decide between atrovirens and vitellinae (colour doesn?t matter). Following the shape of the pronotum it shoud be atrovirens - not the ultra common vitellinae! To be shure, it would be nice to know the host plant. Did you find this specimen on Populus tremula?
Best regards
Frank

Posted by Andre Jas on 02-11-2006 00:38

Hi Frank,
oops, that's the part I always forget, because I'm not really interested in plants and trees. Still I realize it's important to know the host plant. I've got this shot of a leaf. Maybe you can derive from that which plant it was... I understand that Phratora vitellinae has Salix as hostplant. But Salix has long, slim leaves? If it turns out to be atrovirens, you can have the images if you want. I didn't find one in your gallery?

Edited by Andre Jas on 02-11-2006 01:01

Posted by Frank Koehler on 02-11-2006 21:30

Hello Andr?, it is a difficult case and I had to ask a leafbeetle expert first. Two results: The host plant doesn?t matter, it?s only Populus sp. (vitellinae you will find on Populus too). Ph. atrovirens is possible, but without male genitalia there will be no 100% id. But we can call your specimen "atrovirens cf." If it?s possible, you should collect some males and we can delete the "cf.". If you send me photos, please crop them to 600x400. Thanks in advance Frank

Posted by Andre Jas on 02-11-2006 22:41

Hi Frank,
You went through a lot of trouble again:p. It's good enough for me. I know I won't be able to get full ID on many of my photo's, but I just can't put myself to collecting them. Don't get me wrong it's fine others do! It just like fishing: I like fish but I will never ever catch them myself. I know I'm a hypocrite. So this is fine. Thanks.
I'll try to remember to crop my images next time. If there are any images you'd like, just say so and I'll send them ;).

Andr

Edited by Andre Jas on 02-11-2006 22:44

Posted by miked on 03-11-2006 15:23

Just incase you are interested the leaf does look very much like Populus tremula, from a lower shoot I'd guess by the hairs (upper leaves are supposed not to have them)

Posted by Andre Jas on 03-11-2006 21:20

Hi Frank,

Thanks. Do you know this site I just found (I guess you do):
http://home.zonne.../begin.htm.
It's in dutch mostly, but that won't be a big problem for you I gather...
E.g. First choose "Enter" than in leftmenu "Planten". Neat huh?
Cheers,

Andr?

Oh by the way Frank, in a few month we will move to Germany, in between Nordhorn and Twist. Do you know any great (beetle) spots in that area that I can check out next year?

Edited by Andre Jas on 03-11-2006 21:21

Posted by Frank Koehler on 03-11-2006 22:22

#10

Hello again!
The host plant doesn?t matter, because this would be only interesting, when larvae were found. The beetles you can find on a lot of Populus and Salix sp. The photo shows no Populus tremula - that?s right.

Hmm, about collecting I should say nothing, but if you want real progress in any group, you have to collect the specimen!!!

Next topic: This region is terra incognita, but I can ask some colleagues for contacts. Please send me an e-mail ...

Best regards
Frank