Thread subject: Diptera.info :: Drosophila, Beer Trap, Netherlands

Posted by Paul Hoekstra on 30-08-2020 20:46
#1
Which Drosophila could this be? I get stuck with the key in Baechli et al. 2004

Beer Trap (23-25)-8-2020 in park Almere, Netherlands.

Thanks in advance

https://waarnemin...199112649/.

waarneming.nl/media/photo/030/323/30323132.jpg
waarneming.nl/media/photo/030/323/30323133.jpg
waarneming.nl/media/photo/030/323/30323134.jpg

Posted by Jan Maca on 31-08-2020 07:06
#2
Abdominal pattern of this specimen is somewhat peculiar, perhaps because it is still a bit teneral. However, oviprovector shape and 4v-index (about 1.0) show that it is D. funebris.

Posted by Paul Hoekstra on 31-08-2020 21:38
#3
Thank you! I got stuck in the key at that species, but this one was different from normal specimens of D. funebris, that's why I thought I was wrong.

p.s. What is the 4v-index?


Posted by Jan Maca on 01-09-2020 06:31
#4
4v-index is the length ratio of the apical section of M1
to the preapical section of this vein

Posted by djo on 04-09-2020 19:43
#5
I would have guessed Hirtodrosophila confusa!

Posted by Jan Maca on 07-09-2020 00:33
#6
Sorry, this specimen confused me. It is H. confusa - nomen omen.