Duvalius abyssimus is a species of beetle first described in 2014 by biologists Ana Sofia Reboleira and Vicente Ortuño.

The beetle is native to the Krubera Cave in the Arabika Massif, Western Caucasus.

It was discovered during expeditions to Krubera-Vorónia in 2010 (the deepest cave in the world at the time).

[1][2] The specimens were found in the upper part of the cave, at 60 meters depth.

[1] Duvalius abyssimus measure 6.6–6.8 mm (0.26–0.27 in) in total body length.