Oritoniscus flavus (Budde-Lund, 1906)

Status

GB IUCN status: Not applicable (non-native)
GB rarity status: Naturalised

Identification

This is a dark purplish-red species, capable of rapid movement, somewhat reminiscent of a large Trichoniscus pusillus. However, it differs in the eye being composed of a single prominent ommatidium and both eye and body pigments fade in alcohol to a pale straw colour (T. pusillus has three ommatidia and body pigments are retained).

Warren Maguire
Warren Maguire
J.P. Richards
Keith Lugg
Keith Lugg

Distribution and Habitat

This species is virtually confined to Ireland, where it is locally common across much of south-east. It was unknown in Britain until 1994 when a site was discovered in south Wales.  In 2010 a population was discovered in Scotland (Sivell & Gregory, 2012).

It is characteristically associated with river and stream valleys, often inhabiting rough vegetation beside watercourses, where it occurs among leaf litter, under stones and dead wood. 

Distribution

Reference

Sivell, D. & Gregory, S.J. (2012) Oritoniscus flavus - a woodlouse new to Scotland. Bulletin of the British Myriapod & Isopod Group 28: 44-49.

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

idBmigTaxa

72

BRC Code

Cru_1558