Orthotylus nassatus is a species of bug from a family of Miridae that can be found everywhere in Europe except for Andorra, Liechtenstein, and various European islands.

[1] and east across the Palearctic to Siberia and from Asia Minor to the Caucasus.

Adults are 5.0 millimetres (0.20 in) long, the colour of which is blue-green.

Antennas are pale from above, with a dark line on the underside.

[2] The species feeds on trees, like: lime, oak, and ash.