Porcellionides pruinosus (Brandt, 1833)

Common name

Plum Woodlouse


Metoponorthus pruinosus (Brandt, 1833)


GB IUCN status: Least Concern


A medium sized (to 12mm) purplish-brown woodlouse with a characteristic blue-grey bloom.  The body colour contrasts against the long whitish legs and the pale annulations on the antennae.  The body has an obviously stepped outline allowing rapid movement.

J.P. Richards
Keith Lugg
Bill Urwin

Distribution and Habitat

P. pruinosus is widely distributed throughout Britain and Ireland, perhaps most common in central and eastern England (but it is under-recorded in many areas). 

Characteristically it is found within manure heaps, even those in fields (where it can be abundant), but also associated with out-buildings of dairy farms, stables or riding schools, and compost heaps in churchyards, gardens and allotments.


Gregory, S. (2009) Woodlice and Waterlice (Isopoda: Oniscidea & Asellota) in Britain and Ireland.  Field Studies Council/Centre for Ecology & Hydrology.



BRC Code