Gallery Links
Users Online
· Guests Online: 8

· Members Online: 1
Steve Gaimari

· Total Members: 3,930
· Newest Member: Xabier
Forum Threads
Theme Switcher
Switch to:
Last Seen Users
· Steve GaimariOnline
· Nosferatumyia< 5 mins
· tlegrand00:31:01
· John Carr00:39:24
· Johane00:39:36
· Justafly01:36:35
· binturong02:07:02
· MStoltze03:00:11
· evdb03:28:27
· Bas03:33:46
Latest Photo Additions
View Thread
Diptera.info :: Identification queries :: Diptera (adults)
Who is here? 1 guest(s)
 Print Thread
Norway: Tachinidae - Tachina magnicornis ♂ ? => Tachina fera ♀
Jorn R Gustad
#1 Print Post
Posted on 17-07-2017 10:34
Member

Location: Averøy, Norway
Posts: 129
Joined: 26.12.11

Observed and subsequently sweep netted 15th July in my garden located in coastal farmland at 63 degrees N 32 m asl. I suspect it to be a male, and a magnicornis rather than fera. Both species are occurring in Norway, the latter being more common/widespread, but the records are probably somewhat ambiguous.

Any help appreciated as always!

Cheers Jørn
Jorn R Gustad attached the following image:


[284.95Kb]
Edited by Jorn R Gustad on 17-07-2017 20:28
 
Jorn R Gustad
#2 Print Post
Posted on 17-07-2017 10:36
Member

Location: Averøy, Norway
Posts: 129
Joined: 26.12.11

Dorsal
Jorn R Gustad attached the following image:


[266.96Kb]
 
Jorn R Gustad
#3 Print Post
Posted on 17-07-2017 10:36
Member

Location: Averøy, Norway
Posts: 129
Joined: 26.12.11

Head
Jorn R Gustad attached the following image:


[270.68Kb]
 
Jorn R Gustad
#4 Print Post
Posted on 17-07-2017 10:47
Member

Location: Averøy, Norway
Posts: 129
Joined: 26.12.11

Tip of abdomen
Jorn R Gustad attached the following image:


[300.02Kb]
 
John Carr
#5 Print Post
Posted on 17-07-2017 12:58
User Avatar

Member

Location: Massachusetts, USA
Posts: 5917
Joined: 22.10.10

I think I see median marginals on tergite 2.
 
http://www.flickr.com/photos/31715949@N00
Jorn R Gustad
#6 Print Post
Posted on 17-07-2017 19:53
Member

Location: Averøy, Norway
Posts: 129
Joined: 26.12.11

Thanks John, I am so inexperienced in the clinal terms of Diptera, so I do not understand in which way your comment directs. Please elaborate.

I find the specimen to match the abdomen, claw and oe features for magnicornis in key of Tschorsnig & Herting, 1994 - translated by Rayner & Raper (2001), but I am unsure if the frons are broad enough for it, or if the frons points to fera. An experienced eye might tell?

Citation, from page 50:
Frons in males 0.68 - 1.08x, in females 0.94 - 1.28x as wide as one eye. Fore tarsus yellow, seldom brown.
The black longitudinal abdominal stripe ends almost always in a tip on tergite 5. Males: anterior claws almost
as long as the last 2 tarsal segments combined (fig. 146); frons as a rule without oe, seldom 1 oe present
.................................................................................................................................. fera L.

− Frons in males 1.10 - 1.39x, in females 1.27 - 1.55x as wide as one eye. Fore tarsus brown or black. Males:
anterior claws clearly shorter than the last 2 tarsal segments combined; frons with 1 or 2 oe ....................7

7. The black longitudinal abdominal stripe widens towards the end on tergite 5, seldom ending in a point. Males:
anterior claws longer than the last tarsal segment. Females: 4th segment of the fore tarsus clearly wider than
long..................................................................................................................magnicornis Zett.
Edited by Jorn R Gustad on 17-07-2017 20:02
 
Zeegers
#7 Print Post
Posted on 17-07-2017 20:05
Member

Location: Soest, NL
Posts: 12380
Joined: 21.07.04

It is a female, the claws are much too short for a male.
Females are very difficult.
But in this case, the metatarsi are red, so I have little doubt it is fera.
The shape of the abdominal vitta is highly unreliable.

Theo
 
Jorn R Gustad
#8 Print Post
Posted on 17-07-2017 20:26
Member

Location: Averøy, Norway
Posts: 129
Joined: 26.12.11

Thanks, Theo! [Edit] I wrongly looked at the foreleg claws, not the hind leg (anterior) claws... I also understand that that all tarsomeres needs to be dark, and have probably greatly misunderstood the oe - outer orbital bristles problematics. Anyway - I will not give up!

Cheers Jørn
Edited by Jorn R Gustad on 17-07-2017 20:37
 
Zeegers
#9 Print Post
Posted on 17-07-2017 22:02
Member

Location: Soest, NL
Posts: 12380
Joined: 21.07.04

You should look at the fore claws, indeed, although you can use any in this case. But in males it is much longer.
Since all females have 2 pairs of proclinate orbitlas, the feature is only relevant for males. The vertex is broad for a male, but narrow for a female ....

so sexing right is crucial here

Theo
 
Jump to Forum:
Similar Threads
Thread Forum Replies Last Post
Tachinidae - Ceranthia Diptera (adults) 1 23-02-2018 20:21
Tachinidae - Red abdomen Diptera (adults) 2 23-02-2018 14:44
Tachinidae - Solieria pacifica Diptera (adults) 11 22-02-2018 19:05
Tachinidae: Gonia sp? Diptera (adults) 4 21-02-2018 21:47
Tachinidae ID Diptera (adults) 2 21-02-2018 18:36
Date and time
24 February 2018 00:57
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.

23.02.18 16:41
Usually called tegula, see Glossary

23.02.18 15:16
Hello and happy Friday Can any1 help with the translation of epaulet Die Halteren sind schwärzlich und Epaulet Thx

23.02.18 07:16
If you stroll through the Stratiomyidae gallery you will come across this Ptilocera species.

21.02.18 19:42
Just curious: which Stratiomyidae species is the one in the title of diptera.info?

09.02.18 11:00
Thx very much for the help

08.02.18 15:09

08.02.18 15:07
syn. n. = synonymum novum = new synonym

07.02.18 11:40
Hello Can anyone help out with this abbreviation syn. n. Thx

25.12.17 00:22
I join the others in wishing all forum members a wonderful Christmas season and a great New Year!

21.12.17 19:44
Merry Christmas everyone !

Render time: 3.59 seconds | 133,063,226 unique visits