Thread subject: Diptera.info :: Drosophilidae (1), August 30, 2007
#1
Naro-Fominsk, Moscow region, Russia. Caught on decorticated wood of
Betula at the point where the tree was broken. Size less than 2 mm.
#2
Wonderful photos as always! Is it Rhododendron sp. leaf, Dima?
Drosophila sp. for the fly?
#3
No, it's Ground-elder (
Aegopodium podagraria), my favourite this year
. Since anterior reclinate
or are approx. as thick as proclinate
or and located in front of the latter, I think it's
Chymomyza and not
Drosophila.
P.S.
nigrimana (distincta) or
fuscimana? Is it possible to tell w/o examining genitalia?
#4
thanks.
#5
I'm not sure about this specimen (didin't keep it), but on September 11 there was a lot of very similar flies ob fresh stumps of
Betula, both males and females. Andrey Ozerov kindly checked male genitalia and in Stackelberg's key it fitted well
Ch. nigrimana (Meigen, 1826). Now it's
Ch. distincta (Egger, 1862), am I right?
#6
Two species would fall under the first couplet of Stackelberg's key:
C. fuscimana and
C. distincta.
C. nigrimana is given as questionable synonym of
C. fuscimana in the Fauna Entomologica Scandinavica handbook. The genitalia illustrated by Stackelberg mostly resemble those of
C. fuscimana and not those of
C. distincta. Comparing the image with specimens of
C. fuscimana and
C. distincta I collected last month (I was lucky, I also collected
C. caudatula and
C. amoena, so four species within three weeks
) I would also go for
C. fuscimana: The mesonomtum is paler than in
C. distincta (that appears to have a darkened scutellum) and the the ventral setae on the fore femore are less regularly placed than in the latter species.
#7
Thanks a lot Paul, Stackelberg simply gives the picture from Duda (fig. 18 on p. 45), and there's a handwritten note
'fuscimana' against
nigrimana in my copy (quite probably by Mr. Okada), so I think I could upload it to the Gallery as
Ch. distincta.
#8
I hope you mean as
fuscimana. See both Okada's note and my remarks in favour of that species above...
#9
Well of course you're right Paul,
fuscimana, sorry for the mistake
.
#11
I blush
. Now hope to put a name on
Campichaeta images.