Thread subject: Diptera.info :: Aulacigaster sp, W-HU, Juny 2009
Posted by pwalter on 29-01-2010 22:02
#1
Hi, I had 2 specimens of Aulacigaster collected from tree sap. Both look quite like each other. This is the first:
Edited by pwalter on 29-01-2010 22:03
Posted by pwalter on 29-01-2010 22:03
#2
2
Posted by pwalter on 08-02-2010 15:17
#3
Hi, according to Manual of Palaearctic Diptera 3 it must be Aulacigaster falcata, male. Can anybody check it? page 280
Posted by phil withers on 08-02-2010 17:26
#4
Either
falcata or
leucopeza: check the black markings on the frons. If large and almost touching the eye margin, it is
falcata.
Posted by Jan Willem on 08-02-2010 20:20
#5
My guess would be
A. leucopeza, the surstylus seems not long enough (but it's difficult to judge from a photo, so I may very well be wrong). If it is
A. leucopeza then the shining areas on the frons should be just small areas at the outside of the hind ocelli.
Posted by pwalter on 11-02-2010 21:07
#6
Hi, finally my computer is ok now, so I can show the picture os the animal. Unfortunately it is not clear, whether the markings are big or not, later I'll check the specimen (but only when I go home from the university).
Walter
Posted by viktor j nilsson on 12-02-2010 07:37
#7
Quite the opposite, from this nice picture it is very obvious that the spots are small, and it is thus A.leucopeza!
Tou can compare the spots of A. leucopeza
http://www.discov...+leucopeza
with, for example A. pappi, which, like falcata, has large spots:
http://www.discov...ster+pappi
The discoverlife homepage has a very nice page with pics of several Aulacigaster species from around the world, check it out! And when you are there donīt miss Aulacigaster melanoleuca - strange creature!
http://www.discov...e.org/20/q
Posted by pwalter on 12-02-2010 10:18
#8
Thank You very much for the help and the links!
Posted by pwalter on 13-02-2010 23:00
#9
Did not mention before: this A leucopeza was on the same tree as A. falcata. Interesting, sometimes I doubt that spp really fight for ecological niches that much and at one area only one species can fill a niche in.
Posted by viktor j nilsson on 14-02-2010 19:31
#10
Yes, I did notice that they are from the same place, and it did make me hesitate for a second. But then again, sometimes i really think that some of the ecological "rules" regarding competition and resource partitioning is quite often more of artefacts resulting from studying species dynamics in the species-poor assemblages readily studied by researchers living in temperate environments.