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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Longhorn and Leaf Beetles (Chrysomeloidea) » Longhorn Beetles (Cerambycidae) » Prioninae » Prionini » Prionus » subgenus Prionus (Prionus subgenus Prionus) » California Root Borer (Prionus californicus)
Photo#583468
Prionus californicus - California Wood Borer - Prionus californicus
Copyright © 2011 Marcel Such

Prionus californicus - California Wood Borer - Prionus californicus
Northwest of Lyons, Larimer County, Colorado, USA
August 10, 2011
Size: Large
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Contributed by Marcel Such on 2 October, 2011 - 1:06pm
Last updated 2 October, 2011 - 2:17pm

Moved
Moved from ID Request.
… Marcel Such, 2 October, 2011 - 2:17pm login or register to post comments

Female Prionus californicus?
"Large" is kind of subjective... There are 8 species of Prionus Longhorns in Colorado.

It looks like a female Prionus californicus to me, and a search indicates that this is also found in Colorado.

- Bill
… Bill Myers, 2 October, 2011 - 1:26pm login or register to post comments

 
I never measured it, but seem
I never measured it, but seem to remember about 5cm. Don't take my word on that though, I've never been good at estimating length.
… Marcel Such, 2 October, 2011 - 1:31pm login or register to post comments

 
Prionus types in Larimer County
Here's the Prionus species list for Larimer County:

Prionus californicus
Prionus integer
Prionus palparis
Prionus fissicornis
Prionus emarginatus

Give those a gander and let me know what you think.

-Bill

P.S. - This info was obtained here:

http://www.colostate.edu/Dept/bspm/extension%20and%20outreach/Prionus%20Longhorns.pdf
… Bill Myers, 2 October, 2011 - 1:56pm login or register to post comments

 
I think P. californicus
Thanks for the info. It is definetly not integer, fissicornis, palparis, or emarginatus. P. palparis isn't in the guide, but I found an image on the wider-web, and it's not right. Thanks!
… Marcel Such, 2 October, 2011 - 2:10pm login or register to post comments

 
Size
The Prionus californicus is the largest Longhorn found in Colorado. It measures between 3.5 to 5 cm. So, if it was actually 5 cm long, a female P. californicus is a pretty good candidate.

- Bill
… Bill Myers, 2 October, 2011 - 1:38pm login or register to post comments

I'm certain that you'll find your beetle...
... somewhere in genus Prionus. This can be a tricky group, with several sub-genera, so I don't dare try to get too specific. Just for illustration, here are a couple of random examples: .
… Carmen Champagne, 2 October, 2011 - 1:23pm login or register to post comments

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