Description: A very tumid shell of an angular, oval shape with broad, rounded umbos behind the mid point. Surface glossy with fine concentric striae. Numerous pores are visible inside the shell. Colour whitish to yellowish often coatred with a red-brown deposit. Widespread. 2.5-3.5mm.

World Distribution: Distribution type: Circumpolar Wide-temperate (66).

Irish Distribution: Widely distributed but somewhat localised by its habitat preferences.

Ecology:

• Predominantly in habitats of small size
• Characteristic of marshes, marsh drains, flooded margins of lakes and rivers and peaty pools in the uplands

Key Identification Features:

• A small, tumid shell with rounded umbos behind the mid point creating an angular shape
• Surface very porous but glossy with fine concentric striae
• Colour whitish to yellowish
• Often coated with a red-brown deposit

Red list status:

• Least concern (lc).

Distribution Map from NBN: Euglesa obtusalis at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Euglesa obtusalis at iNaturalist World Species Observations database.

GBIF data for Euglesa obtusalis | Classification: Bivalvia, Sphaeriida, Sphaeriidae, Euglesa

Thumbnails for genus Euglesa