Thread subject: Diptera.info :: Lonchaeidae?

Posted by kurt on 16-09-2010 20:24
#1

This fly was 5-6 mm. Is it possible to give it a name?

Photo from Nattsjön, Ångermanland, Sweden 62.53N 17.45 E 19 june 2010

Thanks for your help in advance

Regards

Kurt Holmqvist

Posted by kurt on 16-09-2010 20:25
#2

Last shot

Posted by Nikita Vikhrev on 16-09-2010 21:19
#3

At least Lonchaeidae is correct

Posted by Iain MacGowan on 17-09-2010 10:49
#4

Hi Kurt
adult Lonchaeidae are notoriously diffficult to ID from photos as most of the key characters are difficult to see - what I can say is that it is a female Lonchaea spp. - the rather obscurelly orange basal tarsomeres may suggest L. obscuritarsis or L. albitarsis but thats just a bit of a guess ......... Iain

Posted by Mark-uk on 17-09-2010 13:51
#5

Hi Ian

you say adult Lonchaeidae are notoriously difficult, are the immature stages easier then?

Mark

Posted by kurt on 17-09-2010 20:14
#6

Many thanks to Nikita and Iain.
Kurt Holmqvist

Posted by Iain MacGowan on 20-09-2010 10:38
#7

Hi Mark
adult Lonchaeidaee not too diffivcult to do if you have a microscope - the key characters relate to the number / colour of setae on the body and the shape of the genitalia - however these do not show up well on photographs! so only a very few spp can be identified on this site. Perhaps I was being a bit pedantic by saying adult! - the larvae of most British species can be identified from the shape of the head skeleton - its all laid out in MacGowan, I. and Rotheray, G. E. 2008. British Lonchaeidae. Diptera, Cyclorrhapha, Acalyptratae. Handbooks for the Identification of British Insects, Vol. 10 (15).