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Two lucanids compared - male - female

Two lucanids compared - Male Female
Nashua, Hillsborough County, New Hampshire, USA
I wanted to show the side-by-side comparison of female lucanids: Lucanus capreolus left; Dorcus parallelus right. But as Steven Verney points out in a comment below, the L. capreolus is actually a minor male. Both individuals are posted separately I think.

Is D.parallelus common in your area?

Apparently not
This is the only one I've found compared to maybe eight L. capreolus.

Looks like minor male L. capr
Looks like minor male L. capreolus (based on mandibles):


By golly, Steve, you're right!
I should have looked at my own previous shot of a female below ;-)

some doubts
Hi folks, I'm kind of new here.
I'm not much of an expert on American coleopters (I'm from Italy and I have lived here for just 2 1/2 years now) but comparing the picture of the female together with the male and that of the female alone, they do not seem to be the same species. The first shows a lightely streaked abdomen while the second clearly doesn't (seems rather polished). I might be wrong but many times (at least in the old world :-)) this type of a feature is enough to separate species.
I don't know about the genus...the genus could be right.

You're correct.
They are different genera. One is Dorcus and the other is Lucanus. The point of the image is to provide side-by-side comparison in order to see the very differences you noticed. Because of this, the image will remain at family level.

makes more than sense. I just wanted to point out what seemed to me as a striking diffirences between the specimens.

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