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Photo#986030
Spiky mite

Spiky mite
Corvallis, Benton County, Oregon, USA
August 26, 2014
Size: approx 0.5mm
Any ideas on genus or species?
This mite has a stylophore, and the palps look like they have the thumb-claw processes so that leads me to Tetranychidae. The arrangement of the long, spiky setae is pretty interesting. All of them are set on raised bases. There are 3 pairs of setae down the middle of the back of the opisthosomal region. The other long, spiky setae are set laterally on the back. There are 2 set singly on each side of the prodorsum. Then, there are 3 pairs set along each side of the opisthosoma. And a group of 3 spiky setae on each side of the posterior edge of the opisthosoma.
The adult mites were brick red when alive. These were found on a hazelnut leaf. There was leaf-stipling, but no webbing to speak of. The eggs were also red. I thought this could be a European red mite, but the arrangement of the spiky setae doesn't seem right from what I can tell.

Images of this individual: tag all
Spiky mite Spiky mite Spiky mite Spiky mite

Moved
Moved from Spider Mites.

Tetranychopsis horridus
An acarologist helped me ID these as Tetranycopsis horridus. Here is information from the Invasive Mite Identification website:

"The hazelnut mite, T. horridus (C&F), is a pest of filberts in Europe, Asia, and Oregon and also feeds on yarrow, walnut, spruce, pine, red cedar, and beans."

Can someone erect a page for this species?

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