Porcellio spinicornis

Porcellio spinicornis is a woodlouse, a land-dwelling isopod crustacean in the family Porcellionidae. It is widespread across Europe and has also been introduced to North America. The species is a medium-sized woodlouse, usually about 10 to 15 millimetres long, with a glossy, slightly granular body that ranges from dark gray through brown to yellow and often carries two rows of yellow blotches. Whatever the body colour, the head and the last five body segments stay dark. It has broad, spiny lobes at the front sides of the head, which give the species its name. It lives in forests, grasslands and rocky ground, is active at night and feeds on dead plant material such as leaves, twigs and bark. Like other isopods the female carries her eggs and young in a fluid-filled brood pouch, the marsupium, until the first juvenile stage. It is not listed on the IUCN Red List and has entered the hobby trade in pet isopods.