Ligidium hypnorum (Cuvier, 1792)

Common name

Carr Slater


GB IUCN status: Least Concern

ID Difficulty


This species can be confused with the common Philoscia muscorum, which is of a similar size and shape (both having a  stepped body outline). However, L. hypnorum is much more attractively mottled and its antennal flagellum is composed of numerous bead-like segments (P. muscorum has three flagella segments).

J.P. Richards
Keith Lugg

Distribution and Habitat

It occurs mainly south of The Wash and River Severn, being most abundant in south east England. (NBN records from the north-east need to be verified.)

In the south-east it inhabits a wide range of waterlogged habitats, but further north and west it becomes restricted to semi-natural habitats, such as ancient woodland and fen carr.   It occurs among moss and leaf litter, within sedge and grass tussocks, or beneath dead wood and stones. A very fast woodlouse, and difficult to capture.

This summary is based on the detailed account in Gregory (2009).



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



BRC Code