MolluscIreland - land and freshwater
  • Pisidium subtruncatum Malm 1855 Short-ended pea mussel

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A moderately tumid, strongly oblique, oval shell with prominent umbos well behind the middle. Surface silky/glossy with fine, irregular ribbing. Colour whitish to grayish. Widespread and common.

Key characteristics

  • Characterised by the strongly oblique shell shape
  • Umbos prominent and well behind the middle
  • Surface glossy/silky with fine irregular ribbing
  • Colour whitish to grayish

Size

2.7-4mm.

World Distribution

Distribution type: Circumpolar Wide-temperate (66).

Irish Distribution

One of the commonest pea shells in Irish habitats and found throughout, though rarer in the west and north and at higher elevations.

Ecology

  • Nearly always found in lowland areas and in larger, richer habitats
  • Less common in marshes, ditches and smaller habitats generally

Red List status

  • Least concern (lc).

Wikipedia link

Wikipedia page for Pisidium subtruncatum

 Anderson, R., (2016). Pisidium subtruncatum Malm 1855. [In] MolluscIreland.
http://www.habitas.org.uk/molluscireland/species.asp?ID=138 Accessed on 2017-12-15.