Pleuroxus (Picripleuroxus) laevis (Sars, 1862) .

A rare littoral species occurred in two lakes (S5, A26) and one pond (A17). Ephippial females were found in autumn in a lake (A26). Predominantly a Palearctic species, common in temperate regions of Eurasia, rare in Paleotropics; in East Asia penetrates south to Malaysian peninsula. For a description see Alonso (1996) and Korovchinsky et al. (2021).