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Diptera.info :: Literature :: What is new?
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Suilla
oceanlis2000
#1 Print Post
Posted on 28-07-2011 10:15
Member

Location: Wales, UK
Posts: 570
Joined: 15.06.10

Hi

Looking at the Suilla Key at http://www.online-keys.net/infusions/keys/keys_view.php

I am wondering what is meant by short and long arista?

Thank you
Dr Elisabeth A. Harris
@FloraConsUK
 
Stephen R
#2 Print Post
Posted on 28-07-2011 11:02
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Location: Clitheroe Lancashire UK
Posts: 2378
Joined: 12.06.09

It's 'long plumose' (feathery with long rays) and 'short plumose' (feathery with short rays). The other possibilities are 'bare' and 'pubescent' (downy - very short rays).
 
Andrzej
#3 Print Post
Posted on 28-07-2011 11:37
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Location: Poland
Posts: 2081
Joined: 05.01.06

You should measure the width of "feather" and compare to the diameter of the basal part of arista, or to the height of first flagellomere !
dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences
 
Andrzej
#4 Print Post
Posted on 28-07-2011 11:44
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Location: Poland
Posts: 2081
Joined: 05.01.06

a pic from Czerny (1927) !
Andrzej attached the following image:


[16.35Kb]
dr. A. J. Woznica, Institute of Environmental Biology, Wroclaw University of Environmental & Life Sciences
 
oceanlis2000
#5 Print Post
Posted on 30-07-2011 10:17
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Location: Wales, UK
Posts: 570
Joined: 15.06.10

Thank you both,

It seems that the length of the arista is c. the same in both

What do you mean by Ray (Stephen) feather (Andrzej), 1 hair on the arista?

Short plumose seems to have long hairs on the arista?
Dr Elisabeth A. Harris
@FloraConsUK
 
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