Tags: Crustacean.
Oritoniscus flavus is a species of woodlouse from the family Trichoniscidae which can be found in Ireland and Wales and also in eastern Scotland where it was recently discovered. It is a dark purple or maroon colour and can thus be told apart from the paler Trichoniscus pusillus. It is also at 8 mm (0.31 in) long slightly larger. It has a wide head and a tapering body producing a shape reminiscent of a trilobite.