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Hi Kevin, 

You were pretty close with "yeast", but they are laboulbeniales fungi of
the Class Laboulbeniomycetes. They are quite common on dung beetles from
around the world, and also occur on a wide variety of other beetles.  A
five volume work on the group was published by Thaxter from 1896-1931,
but I think the group has been neglected by Mycologists over the last
few decades . . . or perhaps half century! 

Cheers, 

Bruce 

B.D.Gill, Ph.D., F.R.E.S. 

Editor-in-Chief, _Biodiversity_ 

Published by Biodiversity Conservancy International
http://biodiversityconservancy.org 

and Taylor & Francis Journals http://www.tandfonline.com/loi/tbid20  

On 2017-10-11 15:13, Floate, Kevin wrote:

> Hi All: 
> 
> My colleague, Wes Watson, has a project with _Onthophagus taurus_.  A number of the adult beetles he's recovering are speckled with yellow spots.  Closer examination reveals what appears to be yeast(?) in the spots.  Have others made a similar observations on beetles?  Photos are attached. 
> 
> Any clue as to what these are? 
> 
> If you can help Wes out, I know he would appreciate it.  Please contact Wes directly at [log in to unmask] 
> 
> Thanks, 
> 
> Kevin 
> 
> Kevin Floate, Research Scientist 
> 
> Insect Biocontrol | Lutte biologique aux insectes 
> 
> Lethbridge Research Centre | Centre de recherches de Lethbridge
> Agriculture and Agri-Food Canada | Agriculture et Agroalimentaire Canada
> 5403 - 1st Avenue South, P.O. Box 3000 | 5403 - 1ère Avenue Sud, C.P. 3000
> Lethbridge, Alberta, CANADA  T1J 4B1 
> 
> Email | Adresse courriel:  [log in to unmask] 
> Telephone | Téléphone:  403-317-2242
> Facsimile | Télécopieur:  403-382-3156
> Teletypewriter | Téléimprimeur:  613-773-2600
> Government of Canada | Gouvernement du Canada 
> 
> http://sites.google.com/site/dungins/homepage [1] 
> 
> Dr. Kevin Floate, Editor-in-Chief 
> 
> _The Canadian Entomologist [2]_
 

Links:
------
[1] http://sites.google.com/site/dungins/homepage
[2] http://journals.cambridge.org/action/displayJournal?jid=tce