Thread subject: Diptera.info :: Query ? Chalcid (Ormyrus?)

Posted by philporter on 18-08-2014 16:50
#1

This was captured in woodland near Lincoln in eastern England 27/7/14. Any identification help appreciated

Posted by Marc T on 21-08-2014 09:36
#2

Hi philporter,

Ormyrus sp seems very likely to me, but I have no clue about the species. The whole family of Ormyridae is perhaps entirely parasitic in galls of cynipids, as far as I know the genus Ormyrus in oak-galls.

Best regards,

Marc

Posted by philporter on 29-08-2014 22:32
#3

Thanks for that Marc
Kind regards
Phil

Posted by tristram on 30-08-2014 09:47
#4

Probably Ormyrus nitidulus (= Ormyrus tubulosus). They are really quite common around here on oak trees with knopper galls. There are some photos of this species half way down this page at Alain Ramel's Les Insectes site: http://aramel.fre...r-32.shtml
Ormyrus pomaceus is also associated with oak galls but not with knopper galls.
There is a key to to the UK Ormyridae in Oak Galls in Britain by Robin Williams (a PDF seems to be available at the NHM web site but I am saving up to buy a hard copy).

Posted by philporter on 10-09-2014 13:31
#5

Many thanks for this information Tristram. I will see if Robin is willing to have a look at the specimen, but your diagnosis seems entirely likely.
Regards
Phil Porter
Lincolnshire Wildlife Trust