- Pisidium milium Held 1836 Rosy or quadrangular pea mussel
Map hosted by the
National Biodiversity Data Centre, Waterford
To view the species profile on Biodiversity Maps and access the live map, please click on the map.
A tumid, roughly rectangular shell with broad, swollen umbos lying behind the mid point. Surface very glossy, with fairly strong, irregular, concentric striae. Colour yellow to pale brown. Rectangular shape characteristic. Widespread.
Key characteristics
- A tumid, roughly rectangular shell
- Umbos broad and swollen and lying behind the mid point
- Surface glossy with fairly strong, irregular, concentric striae
- Colour yellow to pale brown
Size
2.5-3.5mm.
World Distribution
Distribution type: Circumpolar Wide-temperate (66).
GBIF distribution map [open in new tab]
Irish Distribution
Widespread but becoming slightly rarer towards the north coast and commonest on the central plain.
Ecology
- Widespread in slow-moving water of rivers, streams and drains
- Found in some lake margins
- Although not excluded from more acid waters, generally rare in the highlands
Red List status
- Least concern (lc).
Wikipedia link
Wikipedia page for Pisidium milium
| Anderson, R., (2016). Pisidium milium Held 1836. [In] MolluscIreland. http://www.habitas.org.uk/molluscireland/species.asp?ID=131 Accessed on 2024-10-14. |