Thread subject: Diptera.info :: Which Gymnosoma sp. ?
Posted by skero74 on 16-10-2009 09:43
#1
Bibbona Livorno (Italy). Date: 04/06/2008
Hello,
can i determine the species of this
Gymnosoma or is it not possible from the picture? Thanks
Roberto
Edited by skero74 on 16-10-2009 09:45
Posted by ChrisR on 16-10-2009 10:36
#2
I'd say it is impossible, considering your southern location and the single angle. If you have more angles and more close-ups of the fly then it might help :)
Posted by skero74 on 16-10-2009 12:34
#3
I have only this close up
Posted by Gordon on 16-10-2009 13:55
#4
They all look like rotunda to me, but then that's the only one of the 13 I've seen. (meaning I'm at least 92.308% ignorant here.
Edited by Gordon on 16-10-2009 20:54
Posted by ChrisR on 16-10-2009 14:15
#5
Gordon wrote:
They all look like rotunda (sic - rotundatum) to me
Join the club! :D But that is really the problem ... the features used to identify them are either variable (dusting) or not conclusive (genitalia are identical in many species). You are left wondering if the dusting pattern is enough or whether hairs on the mesoscutum are erect or prone, long or short ... and to me they always look the same! ;)
Of course, with a specimen they are often possible to identify ... but it is never 'easy' :)
Edited by ChrisR on 16-10-2009 14:17