Yes, I have also seen such defects on Copris, Onitis and some aphodines in
Spain, usually in wet conditions (Spring). In dry specimens the defects
become darker and generally match the colour of the surrounding
exoskeleton. I have always assumed it was due to the integument failing to
properly sclerotize due to water saturation during emergence.


On 11 Oct 2017 21:19, "Floate, Kevin" <[log in to unmask]> 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

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]



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 <(403)%20317-2242>
Facsimile | Télécopieur:  403-382-3156 <(403)%20382-3156>
Teletypewriter | Téléimprimeur:  613-773-2600 <(613)%20773-2600>
Government of Canada | Gouvernement du Canada

Dr. Kevin Floate, Editor-in-Chief

*The Canadian Entomologist