Dicaelus furvus carinatus? - Dicaelus furvus
Demopolis , Marengo County, Alabama, USA
September 15, 2015
This specimen is clearly of the genus Dicaelus as seen from the distinctly emarginate labrum and smooth black leather color (almost a matte finish). I believe the species to be furvus due to the humeral carina extending up to 2/3 of the length of the elytra. The distinctive tubercle on the left mandible is a difficult feature for me to distinguish.
The subspecies listed in Ciegler's guide is D. furvus furvus.... Apparently the supspecies located in my region (Alabama) is D. furvus carinatus according to Bousquet's Geadephaga catalouge. The specimen I have fun into are a bit larger than the descriptions I have read for D. furvus furvus