Common striped woodlouse  (Philoscia muscorum )

Woodlice are not insects, but are crustaceans; more closely related to crabs and shrimps than insects. The body is divided into three main regions, the head, the thorax (known in woodlice as the ‘pereion’), and the abdomen (‘pleon’) (3). This species is brownish in colour and mottled with pale patches (4) and, as the name suggests, a clear dark stripe along the back (2).