Thread subject: Diptera.info :: Themira malformans ?
Posted by javanerkelens on 21-06-2014 20:50
#1
Found: 21-06-2014 Lauwersoog Netherlands (during 1000 species-day)
Johanna
Posted by Stephane Lebrun on 22-06-2014 09:25
#2
Wonderful beast !
However, I think it is
Themira superba for these reasons : fore tarsomere 1 without projection dorsally, fore tarsomere 2 shorter than 3d, fore femur processes are matching more
superba than
malformans as their dorsal setae. The pruinosity of different parts of thorax and coxae match more
T. superba too, although it is not always easy to evaluate on a picture.
Posted by javanerkelens on 22-06-2014 09:37
#3
I can send you some specimen..if you like.
Johanna
Posted by javanerkelens on 22-06-2014 10:00
#4
fore legs
Posted by Stephane Lebrun on 22-06-2014 10:01
#5
Gladly, Johanna ! :)
EDIT: just saw your additional picture : it seems now that the fore tarsomere 2 is longer than the tarsomere 3 (artefact or reality ?).
Edited by Stephane Lebrun on 22-06-2014 10:10
Posted by javanerkelens on 22-06-2014 10:47
#6
I seem to have a little problem, because I have one specimen with the fore tarsomere 2 longer and the other one shorter.
The one with the fore tarsomere 2 shorter, also has a long row of p/pv setulae on the midfemur......the other one with the fore tarsomere 2 longer, seems to have less longer hairs on the midfemur.
So I also have to check the two male specimen on alcohol again before sending them to you.
Maybe when I have the time, I will try to make some better photos with my microscope.
Johanna
Edited by javanerkelens on 22-06-2014 10:48
Posted by Stephane Lebrun on 04-07-2014 21:54
#7
Hi Johanna,
with both your specimens in hand, I can confirm the identity of
Themira superba.
The picture 2 is misleading because the fore tarsi has tarsomeres 2 and 3 almost fused, even difficult to distinguish without the adequate angle under lens. This concerns only one of the 2 specimens, the second one has regular distinct tarsomeres.
Tarsomere 2 is therefore somewhat shorter than tarsomere 3 as expected for
T. superba.
All other characters (missing ant. nt stea, pruinosity on katepisternum, meron, anepimeron, coxas, special setae on mid and hind femora, sternite 4) fit 100% with
Themira superba.
Posted by javanerkelens on 05-07-2014 20:17
#8
Themira suberba it is !
Thank you for a proper ID and informative example on your last photo.
Johanna