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Diptera.info :: Identification queries :: Diptera (adults)
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Norway: Dolichopodidae - Rhaphium caliginosum ? => appendiculatum/caliginosum
Jorn R Gustad
#1 Print Post
Posted on 08-03-2018 22:11
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Location: Averøy, Norway
Posts: 133
Joined: 26.12.11

This stowaway on a picture almost escaped my attention, until now. According to the key of d'Assis Fonseca (Handbook for the identification of British Insects Vol IX Part 5, 1978) for Rhaphium males, the third antennal segment is less than six times of the arista in caliginosum, and more than eight times of the arista in appendiculatum. If this character is considered as reliable the depicted specimen should be caliginosum. It was netted 23rd May in SE Norway, on a riverside. Both species appears in Norway.

Any help appreciated as always.

Cheers Jørn
Jorn R Gustad attached the following image:


[249.36Kb]
Edited by Jorn R Gustad on 11-03-2018 23:25
 
Igor Grichanov
#2 Print Post
Posted on 11-03-2018 13:22
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Location: St.Petersburg, Russia
Posts: 1292
Joined: 17.08.06

Jørn, This character is more valuable:
Cercus long, bandlike; 2.4-3.1............................ appendiculatum Zetterstedt
– Cercus short, irregularly triangular, widened at middle; 2.8-3.3 ... caliginosum Meigen
Igor Grichanov
 
http://grichanov.aiq.ru/index.htm
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Date and time
21 June 2018 23:38
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20.06.18 12:13
THx Paul

18.06.18 20:27
TumbsUp

18.06.18 14:56
Thx Paul, I could go for vitta on the abdomen narrows towards the end of the abdomen!

15.06.18 18:36
Would 'narrowing stripe on the back' fit?

11.06.18 13:38
Hello Can any1 help with the words Rückenstrieme dann schmäler werdender Rückenstrieme Thx, Elis

09.06.18 09:14
Smile Nice to meet you! Smile

06.06.18 08:05
I have trouble to send a message...

05.06.18 08:42
I have not seen any used. In Diptera it is relatively rare...

31.05.18 14:27
Hi guys! There is a word in english to refer to an insect when it doesn't have mouthparts? Like some fishs called agnatha.

29.05.18 10:34
Thank you for letting us know

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