beetle - Ozognathus cornutus - BugGuide.Net

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Bostrichoidea » Death-watch and Spider Beetles (Ptinidae) » Ernobiinae » Ozognathini » Ozognathus » Ozognathus cornutus

Photo#110536

Copyright © 2007 Joyce Gross

beetle - Ozognathus cornutus -

San Leandro, Alameda County, California, USA
May 14, 2007
Size: 2mm

Found on yarrow in my backyard.
Looks like an anobiid -- but not sure about those mandibles(?) in front.

Images of this individual: tag all

beetle - Ozognathus cornutus - male

beetle - Ozognathus cornutus - male

beetle - Ozognathus cornutus - male

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Contributed by Joyce Gross on 17 May, 2007 - 1:51am
Last updated 5 November, 2016 - 10:04pm

Wow!

I missed seeing this when it came in. I wonder if the males have jousting contests for mates.

… Jim McClarin, 24 June, 2007 - 7:38am

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confirmation again

O.cornutus is the only species in California.

Recently, an Ozognathus has been naturalized in Europe, feeding on a wide variety of dry plant matter. I have some doubt if it is really O.cornutus, as published. Maybe it is possible for you to catch some from your vicinity and to send them for comparison?

… Boris Büche, 18 May, 2007 - 2:09am

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thanks Boris

I've only ever found one of these (this one). I'll keep an eye out for more -- probably it's not worth sending just one to you.

… Joyce Gross, 21 May, 2007 - 2:50am

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I agree

there is an image of a similar [same?] beast here - Ozognathus sp. - scroll down. you're right, those projections are not mandibles - makes this a male. The LeConte types are on the MCZ site.

… Phillip Harpootlian, 17 May, 2007 - 9:53am

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that looks like it!

Thanks Phil. I forgot to look at the SBNHM site. After further hunting, I see that Ozognathus cornutus is the only Ozognathus listed in both the SBNHM database (one specimen is from my county) and the UCB database (will check the collection for localities in the near future). I can't find any other California-distribution-specific info in American Beetles or the MCZ site, but I think it's safe to assume that's what I have.

I also found this Torry Pines State Park page on insects that says that Ozognathus cornutus lives as an inquiline in cynipid wasp galls (scroll down almost to the bottom of that page) ... very interesting!

… Joyce Gross, 17 May, 2007 - 8:50pm

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