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Photo#1552707
Cybister fimbriolatus female - Cybister fimbriolatus - female

Cybister fimbriolatus female - Cybister fimbriolatus - Female
California/Lowe's, St. Mary's County, Maryland, USA
July 8, 2018

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Cybister fimbriolatus female - Cybister fimbriolatus - female Cybister fimbriolatus female - Cybister fimbriolatus - female Cybister fimbriolatus female - Cybister fimbriolatus - female

Moved
Moved from Dytiscinae.

Moved

Moved
Moved from Beetles.

 
Not Tropisternus
because the sternum does not project posteriorly as a spine AND metatarsal segments of Tropisternus are never as large as this image shows.
I would guess Cybister fimbriolatus judging by the overall shape and longitudinal strioles on elytra

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