Tags: Crustacean.
A woodlouse (known by many common names: see below; plural woodlice) is a crustacean with a rigid segmented long exoskeleton and fourteen jointed limbs. Woodlice form the suborder Oniscidea within the order Isopoda with over 5000 known species.Woodlice in the genus Armadillidium can roll up into an almost perfect sphere as a defensive mechanism hence some of the common names such as pill bug or roly-poly. Most woodlice however cannot do this.
