Metatrichoniscoides celticus Oliver & Trew, 1981

Status

GB IUCN status: Vulnerable
GB rarity status: Nationally Rare

Identification

Metatrichoniscoides is a difficult genus and only male specimens of M. celticus can be distinguished from M. leydigii or preserved specimens of Trichoniscoides.  Identification is made by microscopic examination of male 2nd endopod.

M. celticus is very small (up to 2.5mm long), pure white, entirely lacking ommatidia and the dorsal surface is covered in coarse tubercles.

Keith Lugg
Keith Lugg
Mark Telfer
Steve Gregory

Distribution and Habitat

Confirmed males are known only from south Wales, and it is appears to be endemic to the British Isles.  It is primarily associated with sparsely vegetated erosion banks occurring just above the supralittoral zone, but has also been recorded 7km inland at an altitude of 170 m.

Characteristically, small numbers of specimens are found with extreme difficulty under large stones firmly embedded into damp humus-rich soil. It is typically associated with other trichoniscids, usually Haplophthalmus mengii, Trichoniscoides saeroeensis and Trichoniscus pygmaeus

Distribution

Reference

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_1488