Oval and flat bodied, woodlice measure 13 to 22 mm. The matte surface of their dorsal plates are brown-black or slate gray and is irregularly grainy. All woodlice have seven pairs of identical legs and antennae bent several times.
They inhabit moist areas and are found in large numbers in caves, gardens, underground homes and forests.
In the day they hide in the walls, stones, leaves … They become more active at night and you see them running in all directions in search of food and partners. They feed on soft and juicy decaying plant material, and thus contribute significantly to the formation of the humus layer of soil. The females carry their eggs in a pouch on the belly.