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Photo#1176746
Dermacentor sp. - Dermacentor andersoni

Dermacentor sp. - Dermacentor andersoni
Gresham, Multnomah County, Oregon, USA
Size: About 5.5 mm
This is the second of two ticks I'm guessing belong to Dermacentor. It probably came from a field in south Gresham, Oregon.

Does anyone know any good books or scientific papers for identification of ticks in my area?

Thanks,
Phil

Images of this individual: tag all
Dermacentor sp. - Dermacentor andersoni Dermacentor sp. - Dermacentor andersoni Dermacentor sp. - Dermacentor andersoni Dermacentor sp. - Dermacentor andersoni Dermacentor sp. - Dermacentor andersoni Dermacentor sp. - Dermacentor andersoni

Moved
Moved from Dermacentor.

Moved
a more complete view of the spiracular plate (behind the last pair of legs, Image 6) may help with the species level ID

Moved from ID Request.

 
Spiracular Plate
I uploaded another try at the spiracular plate. I hope it's clear enough to narrow down the species options. Is the plate from image 5 different from the one in image 6?

Thanks for your help,
Phil

 
7 doesnt quite cut it...
can you image slightly further to the right (of what is shown in Figure 7). I would like to see the degree of extension coming off of the plate.

And Images 5 and 6 are similar yes, one can prob be frassed or deleted.

 
Another Try
I propped the tick up and took another picture of the spiracular plate. I also deleted image 5. Are the mouthparts of the Dermacentor tick and the Ixodes tick good identification marks for genus?

 
this view of the plate is better
I'll check my references when I am back at work on Monday

 
Dermacentor andersoni
Thanks for your help, Blaine!

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