Gallery Links
Users Online
· Guests Online: 7

· Members Online: 1
lweit

· Total Members: 4,479
· Newest Member: Volkmar
Forum Threads
Theme Switcher
Switch to:
Last Seen Users
· lweitOnline
· gerold< 5 mins
· RamiP00:08:43
· eklans00:22:54
· binturong00:47:23
· Juergen Peters00:48:08
· Paul Beuk00:49:11
· Tony Irwin01:10:00
· Ectemnius01:11:22
· MorganA01:43:31
Latest Photo Additions
View Thread
Diptera.info :: Identification queries :: Diptera (adults)
Who is here? 1 guest(s)
 Print Thread
Heleomyzidae: Scoliocentra sackeni (Garrett) - male genitalia
Tony T
#1 Print Post
Posted on 18-04-2008 04:21
User Avatar

Member

Location: New Brunswick, Canada
Posts: 657
Joined: 08.02.07

From this male SEE HERE

Andrzej: what a complex genitalia, hope the orientation is OK.
Tony T attached the following image:


[171.18Kb]
Edited by Tony T on 22-04-2008 11:55
 
Susan R Walter
#2 Print Post
Posted on 18-04-2008 14:15
User Avatar

Member

Location: Touraine du Sud, central France
Posts: 1769
Joined: 14.01.06

Phwoaw. This is one instance where a photograph is much better than a drawing.
Susan
 
http://loirenature.blogspot.com/
phil withers
#3 Print Post
Posted on 18-04-2008 14:45
Member

Location: Lyon, France
Posts: 521
Joined: 04.03.08

Excellent pic, but confusing. There appear to be two structures on the left side of the epandrium and only one on the right (maybe the orientation). I'm excluding the surstyli at the top; in any event this is not a Suillia pattern (and I thought the head shot wasn't Suillia either). You need to run this through Gill's key to N. American heleomzids (which I used to have but my ex-wife destroyed in a fit of...guess) to get closer to the genus.
 
Tony T
#4 Print Post
Posted on 18-04-2008 15:52
User Avatar

Member

Location: New Brunswick, Canada
Posts: 657
Joined: 08.02.07

Thanks Susan & Phil.
Andrzej wasn't too impressed, wants me to separate out all the little bits - moth dicks are so much easierPfft
 
Susan R Walter
#5 Print Post
Posted on 18-04-2008 22:41
User Avatar

Member

Location: Touraine du Sud, central France
Posts: 1769
Joined: 14.01.06

Well, of course, Andrzej will have reason and is the expert for this family. I was really making a more general comment about good photographs versus drawings for certain features. For instance, based on my experience with male Bombus genitalia, I find using the photographs in Edwards and Jenner much easier than the drawings in Benton.
Susan
 
http://loirenature.blogspot.com/
Tony T
#6 Print Post
Posted on 19-04-2008 17:41
User Avatar

Member

Location: New Brunswick, Canada
Posts: 657
Joined: 08.02.07

phil withers wrote:
There appear to be two structures on the left side of the epandrium and only one on the right (maybe the orientation). I'm excluding the surstyli at the top; in any event this is not a Suillia pattern (and I thought the head shot wasn't Suillia either)..


Genital capsule flattened, ventral view. Does this help?
Tony T attached the following image:


[170.55Kb]
 
Andrzej
#7 Print Post
Posted on 20-04-2008 19:22
Member

Location: Poland
Posts: 2028
Joined: 05.01.06

Hmm, I am in trouble Smile
I have determined the female as Heleomyza. cf. difficilis
but the genitalia of the previous determined male look like Scoliocentra sensu stricto.
Tony could you check by the male specimen the number of prosternal bristles (1 pair or more than 2 pairs) and the hind femur (if without brush-like spines or with such bristles on the lower inner side) ??.
Regards,
Andrzej
 
Nosferatumyia
#8 Print Post
Posted on 20-04-2008 23:20
User Avatar

Member

Location:
Posts: 3074
Joined: 29.12.07

Tony, I am impressed again. No microscope used? Have you explained your techics in this case already? Just a reverted wideangle objective? And the system of sledges to move the camera slowly you have depicted? I think NO BRAND NEW ready camera+microscope system could achieve such a quality...

Damned tasty...Smile
Val
 
Tony T
#9 Print Post
Posted on 21-04-2008 01:53
User Avatar

Member

Location: New Brunswick, Canada
Posts: 657
Joined: 08.02.07

Andrzej wrote:

Tony could you check by the male specimen the number of prosternal bristles (1 pair or more than 2 pairs) and the hind femur (if without brush-like spines or with such bristles on the lower inner side) ??.
Regards,
Andrzej


Very cleary there is just 1 pair of prosternal bristles. Unfortunately the hind legs broke off when I removed the abdomen. I have the legs but not sure which is outer or inner. Either way, I cannot see any spines on the lower part of the femur.

Valery wrote "No microscope used? Just a reverted wideangle objective? And the system of sledges to move the camera slowly you have depicted?"

No microscope - not necessary! But for this image I used a 10x microscope objective connected to some extensions tubes (see photo) and then connected to a bellows, the bellows attached to the camera.
The total length of extension was 160mm which I believe is the length that these microscope objectives are designed for.
For such small specimens, in this case the genital capsule if just greater than 1mm, one has to use a microscope objective.
For larger specimens a reversed wide angle lens is OK and for an entire fly a regular lens on extensions tubes or bellows.
One can move either the camera or the specimen. I always move the specimen.

None of my techniques are my originals, they are all standard methodology for macrophotography.
Tony T attached the following image:


[84.35Kb]
 
Nosferatumyia
#10 Print Post
Posted on 21-04-2008 07:02
User Avatar

Member

Location:
Posts: 3074
Joined: 29.12.07

Tony, thanx a lot - I am totally a newbie Smile in that sort of things, I used to draw all that stuff in ink until 2005. I cannot say that the microphotography is less time consuming, but the results are so miraculous...
Val
 
Andrzej
#11 Print Post
Posted on 22-04-2008 11:08
Member

Location: Poland
Posts: 2028
Joined: 05.01.06

So, it is clear !. It is Scoliocentra sackeni (Garrett Smile
Andrzej
 
Tony T
#12 Print Post
Posted on 22-04-2008 11:53
User Avatar

Member

Location: New Brunswick, Canada
Posts: 657
Joined: 08.02.07

Thanks Andrzej. I must check and see if I have any other malesGrin
 
Jump to Forum:
Similar Threads
Thread Forum Replies Last Post
Scaeva pyrastri (male)? Syrphidae 2 09-08-2020 14:54
Cecidomyiidae male and further? Diptera (adults) 2 09-08-2020 08:13
Eristalis tenax/pertinax ? > male E. pertinax Syrphidae 3 08-08-2020 16:51
No Cylindromyia, but... - male Clairvillia biguttata Diptera (adults) 4 07-08-2020 09:54
Tephritidae --> Xyphosia miliaria male Diptera (adults) 5 05-08-2020 17:25
Date and time
09 August 2020 16:19
Login
Username

Password



Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Temporary email?
Due to fact this site has functionality making use of your email address, any registration using a temporary email address will be rejected.

Paul
Donate
Please, help to make
Diptera.info
possible and enable
further improvements!
Latest Articles
Syrph the Net
Those who want to have access to the Syrph the Net database need to sign the
License Agreement -
Click to Download


Public files of Syrph the Net can be downloaded HERE

Last updated: 25.08.2011
Shoutbox
You must login to post a message.

08.08.20 14:31
ah ok ! I didn't knew oops !

07.08.20 08:12
They are already in Poland !

04.08.20 21:02
Today a Chrysomya albiceps found in North of France ! I was quite surprised !

02.08.20 10:10
Ok... lower case naming for images.. understood,Lothar

02.08.20 10:02
I uploadad a jpg, but it is not visible in the thread...Lothar

30.07.20 21:32
Have you checked the FAQ already?

30.07.20 02:23
cannot upload photos, it says wrong name. can someone please explain the exact procedure and the does and donts?

19.07.20 15:41
Don't use the preview, post directly.

17.07.20 01:44
Hi, apologies but also can't get photos to load. They are jpg, <300K, no spaces in names. Help? Smile

16.07.20 10:34
Hi Anders. No blanks in filename permitted

Render time: 4.83 seconds | 146,401,114 unique visits