Thread subject: Diptera.info :: Heliozeta pellucens
Posted by crex on 18-08-2007 23:18
#1
Location: About 80 km NW of Stockholm, Sweden
Date: 2007-AUG-18
Habitat: Garden
I've gone through the gallery twice and the species that most resembles mine is
Heliozeta helluo. Is that a correct ID?
I'm not sure if I photographed two different individuals, but I think so. Anyway, I think both are the same species. What sex are they?
Edit: Subject changed (Heliozeta helluo?)
Edited by crex on 19-08-2007 14:09
Posted by crex on 18-08-2007 23:19
#2
The other photo.
Posted by ChrisR on 19-08-2007 09:20
#3
Firstly, I think there is some confusion about the generic name because there is no "
Heliozeta". In Fauna Europaea and in all my keys it is listed as
Eliozeta - so could Paul please change the gallery images accordingly?
I must first admit to not having seen enough specimens yet but both
Clytiomyia continua and
Eliozeta sp. do superficially look quite similar and are sexually dimorphic. They key-out most clearly on the katepisternal bristles, which are not visible here, but going on what I have seen previously I would
guess that this is a
Clytiomyia continua - with the proviso that I'd appreciate Theo's comments :)
Posted by crex on 19-08-2007 10:07
#4
If you tell me where the "katepisternal bristles" are placed I might have a view of these.
Posted by ChrisR on 19-08-2007 10:19
#5
They're on the
side of the thorax, just under the leading edge of the wing, above where the legs attach. We need to count the bristles there :)
Posted by caliprobola on 19-08-2007 10:20
#6
the katepisternum can be found
here
for a total tachinid morphology, look at
this site
Edited by caliprobola on 19-08-2007 10:21
Posted by crex on 19-08-2007 10:23
#7
Ohh, thanks both. I doubt I have a photo from that angle, but will look ...
Posted by crex on 19-08-2007 11:03
#8
Nope, no such view. I was lucky to get those two shots reasonably sharp in the hard wind. :|
Posted by Zeegers on 19-08-2007 13:09
#9
helluo male is much more orange (and helluo female has different orbits). The third antennal segment is elongated and the arista is largely thickened, so it's Heliozeta pellucens.
I've explained my spelling before, so I want dwell on it.
But if you don't write Eliozeta elluo, why not ?
Theo
Posted by crex on 19-08-2007 14:08
#10
I didn't realize there were more Heliozeta species around. Thank you very much Theo for having patience with us amateurs ;) I gather from your reasoning that this is a male!? Thanks again!
Posted by Zeegers on 19-08-2007 16:24
#11
the parafrontalia (between the eyes above the antenna, side of the midfrontal stripe) are yellow and very large, nearly touching each other.
In females, the midfrontal stripe is broad as usual in Tachinids
(mind you: this feature is only valid in Heliozeta and Clytiomyia, yes I know, Rondani wrote it without second -y).
hope this helps
Theo