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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Carabinae » Cychrini » Small Snail Eating Beetles (Sphaeroderus) » Sphaeroderus schaumii
Photo#1471086
Sphaeroderus sp - Sphaeroderus schaumii
Copyright © 2017 Jean-Benoît Duval

Sphaeroderus sp - Sphaeroderus schaumii
Spruce Knob lake (1200m), Randolph County, West Virginia, USA
July 29, 2013
I think it is Sphaeroderus schaumii, but could it be S.bicarinatus?
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Contributed by Jean-Benoît Duval on 25 November, 2017 - 12:48pm
Last updated 26 November, 2017 - 3:35pm

Beautiful!
Thanks for sharing the great photos.

You're right, this is schaumii. S. bicarinatus is only found in the southern Appalachians, NC, TN, SC, GA, AL. The two species are closely related, along with S. nitidicollis. The main feature all three share is the very deeply-incised "trench" below the mentum. bicarinatus has a straighter aedeagus, I believe, and usually a longer pronotum, but there's tons of variation in the latter.

Moved from Small Snail Eating Beetles.
… Curt Harden, 26 November, 2017 - 3:35pm login or register to post comments

Moved
Moved from ID Request.
… margarethe brummermann, 26 November, 2017 - 12:16pm login or register to post comments

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