Pomatinus substriatus Mueller, 1806
Syn.: Helichus substriatus Mueller, 1806
Family: Dryopidae
Size: 5.4 mm (4.2 to 5.5 mm)
Distribution: South Europe, Central Europe, South England
Ecology: The beetles live along the banks of water bodies in moss and on rotting wood
Location: England, Whitebourne
 leg. det. P.Harwood, X.1922
Photo: U.Schmidt, 2015

Pomatinus substriatus  (Flickr)

Pomatinus substriatus (Google+)