MolluscIreland - land and freshwater
  • Pisidium hibernicum Westerlund 1894 Globular pea mussel

Map hosted by the National Biodiversity Data Centre, Waterford
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A very tumid, rounded oval shell with prominent central umbos. Surface with silky/glossy periostracum ornamented by fine, regular striae. Colour grayish to brownish white with scattered red-brown deposits. Common across Ireland.

Key characteristics

  • A small, convex, tumid shell
  • Evenly rounded with prominent central umbos
  • Surface silky/glossy and sculptured by fine, regular striae
  • Colour grayish to brownish white with scattered red-brown deposits



World Distribution

Distribution type: Eurasian Boreo-temperate (55).

GBIF distribution map [open in new tab]

Irish Distribution

Widely distributed in Ireland but probably commoner towards the west.


  • Characteristic of highland lakeshore communities together with P. lilljeborgi
  • But found across a wide altitudinal and climatic range
  • Occurs in a range of habitats, from loughans and lakeshores to lowland rivers and canals

Red List status

  • Least concern (lc).

Wikipedia link

Wikipedia page for Pisidium hibernicum

 Anderson, R., (2016). Pisidium hibernicum Westerlund 1894. [In] MolluscIreland. Accessed on 2024-03-02.