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blue colouration due to Iridovirus - PICTURE!
Louis Boumans
#1 Print Post
Posted on 04-09-2010 19:22

Location: NO Oslo
Posts: 261
Joined: 09.06.04

Someone showed me a picture of shining blue craneflies lately. I'm quite convinced that the blue colour comes from an infection with Iridovirus. This phenomenon is known from tipulid and chironomid larvae, among others, and is also quite common in adult woodlice (esp. Porcellio scaber).

Has anyone else seen blue diptera that normally have a different colour?
Edited by Louis Boumans on 13-09-2010 15:21
Tony Irwin
#2 Print Post
Posted on 05-09-2010 09:25
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Location: Norwich, England
Posts: 7062
Joined: 19.11.04

Any chance of seeing the picture of the craneflies?
Tony Irwin
#3 Print Post
Posted on 05-09-2010 11:08
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Location: Warsaw, Poland
Posts: 743
Joined: 17.10.06

blue accent can be due to extended deposition of wax on cuticule, but not nescesarry in this case
very general entomologist
Louis Boumans
#4 Print Post
Posted on 05-09-2010 11:31

Location: NO Oslo
Posts: 261
Joined: 09.06.04

Hi Tony,

I didn't want to publish the picture on internet as it isn't mine. However the photographer and I intend to publish the picture with a short note.

I can send the picture by email, though.

Louis Boumans
#5 Print Post
Posted on 13-09-2010 10:38

Location: NO Oslo
Posts: 261
Joined: 09.06.04

The photographer, Espen Tangen Aarnes of the BioForsk research station in Pasvik, Finnmark, came back from fieldwork. He agreed to post the picture here.

I also received feedback from Trevor Williams, the most prolific iridiovirus expert. He said that an iridivuris infection is an unlikely explanation, basically because blue adult diptera have not been reported before.

Yet I haven't found a more plausible explanation for the colour.

I think the species depicted is T. (Beringotipula) unca.

Does anyone know of diptera that occur naturally in this colour
Louis Boumans attached the following image:

Edited by Louis Boumans on 13-09-2010 10:39
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