A medium sized species (to 10 mm) with a yellowish and brownish longitudinal pattern on the dorsal surface. It has the general appearance of a slender immature Porcellio scaber, but differs in the shape of the head lobes, notably the medial lobe which bears a characteristic prominent central notch. It also has five pairs of pleopodal lungs. Only females are known (it is believed to be parthenogentic).
A description of this species, with figures, is given by Gregory (2014).
Distribution and Habitat
There are old records from Northumberland, but the only recent records are from Eden Project (Rainforest Biome), Cornwall (2004 to 2009) and Birmingham Botanic Gardens (2017).
It is very widely distributed throughout the tropics and, as an introduction, inside glasshouses elsewhere.