Porcellio scaber Latreille, 1804
Porcellio scaber is a widespread cosmopolitan species
introduced from Europe. It is abundant throughout New Zealand
in urban areas, along roads, and in coastal habitats (Chilton,
1910). There are records of P. scaber from native
forests and it can sometimes penetrate considerable distances
into the bush (Ward et al., 1999; Derraik et al., 2001).
This species can be easily recognised by the dorsal surface
covered with raised bumps and the tri-lobed front margin of
the head. In live animals two pairs of pleopodal lungs can
be seen ventrally (not visible in preserved specimens). Colour
variable, from uniform dull grey to mottled light brown. This
species does not roll into a ball.