About Porcellio laevis Latreille, 1804
Porcellio laevis, commonly known as the swift woodlouse, or smooth slater in Australia, is a woodlouse species belonging to the genus Porcellio. Both its species epithet laevis and the common name 'swift woodlouse' indicate that this species is able to move in quick bursts when it is provoked. It is a notably large species, reaching up to 20 millimetres (0.79 in) in length with a smooth dorsal surface. Males of this species can be recognized by their long, spear-shaped uropods. Its smooth dorsal surface makes it easy to visually distinguish P. laevis from many other species in the same genus. This species is widely kept as a pet, because it has relatively simple care requirements and is available in many different color morphs. It is straightforward to keep, and can successfully establish a colony in a terrarium within just a few weeks. P. laevis was first documented in Britain in the 13th century, but it most likely evolved originally in North Africa. It now has a cosmopolitan distribution, and has been introduced to Australia, as well as Norfolk Island and Lord Howe Island. It can also be found in North America, South America, Western Asia, Japan, and several Pacific islands. This woodlouse lives under rocks and fallen logs in damp environments, and is rarely seen in other locations. Records from Ireland and Britain also note that it lives in agricultural areas such as gardens, farms, and stables, where it can be found in dung and compost piles.
