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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Staphyliniformia » Staphylinoidea » Rove Beetles (Staphylinidae) » Spiny-legged Rove Beetles (Oxytelinae) » Oxytelini » Anotylus » Anotylus insignitus
Photo#723251
Anotylus insignitus? - Anotylus insignitus - male
Copyright © 2012 Anthony Rodgers

Anotylus insignitus? - Anotylus insignitus - Male
Cleveland, Cuyahoga County, Ohio, USA
August 6, 2011
Collected in a pitfall in an urban garden.

I have had many of these in my pitfall samples but this is the first one I've noticed with larger, sickle-shaped mandibles. All of the others have had much smaller mandibles so when I came across this individual I thought it must be a different species. However, here in the guide there are examples of both forms under A. insignitus.

For example:
vs.

Can anyone comment on this?
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Contributed by Anthony Rodgers on 14 November, 2012 - 11:08am
Last updated 20 May, 2018 - 1:31am

good call; many dimorphic spp. among staphs
Moved from ID Request.
… v belov, 14 November, 2012 - 11:41am login or register to post comments

 
Dimorphism
Is this sexual dimporhism?
… Anthony Rodgers, 14 November, 2012 - 11:46am login or register to post comments

 
Sexual dimorphism and also fu
Sexual dimorphism and also further variability within males (some with very large eyes, longer mandibles, more transverse head).

Cheers,
Adam
… Adam Brunke, 15 November, 2012 - 7:28am login or register to post comments

 
I guess
it would be safe to call this a male then?
… Anthony Rodgers, 15 November, 2012 - 11:21am login or register to post comments

 
Yes, and I believe the triang
Yes, and I believe the triangular process on the frons (between the antennae) is another male character.

Cheers,
Adam
… Adam Brunke, 15 November, 2012 - 1:18pm login or register to post comments

 
Cool!
Thanks!
… Anthony Rodgers, 15 November, 2012 - 9:43am login or register to post comments

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