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

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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

Size

2.5-3.5mm.

World Distribution

Distribution type: Eurasian Boreo-temperate (55).

Irish Distribution

Widely distributed in Ireland but probably commoner towards the west.

Ecology

  • 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.
http://www.habitas.org.uk/molluscireland/species.asp?ID=101 Accessed on 2017-10-18.