Description: TYpically a broad, almost equilateral pea shell with broad, low umbos slightly behind the middle. Surface is silky/glossy from faint concentric striation. Colour whitish to grey-brown. Very widespread. 4-5 mm.

World Distribution: With an almost cosmopolitan distribution. Distribution type: Circumpolar Wide-temperate (66).

Irish Distribution: One of the commonest Euglesa in most parts of Ireland along with E. subtruncata.

Ecology:

• Tolerant of a range of trophic conditions from lowland swamps to large, deep rivers and calcareous lakes
• Can occur in peaty pools and swamps at high altitude
• Usually located in bottom sediments but may climb vegetation

Key Identification Features:

• A broad, sub-triangular or oval shell
• Umbos slightly behind the middle
• Sculpture of faint concentric striations
• Periostracum silky, scarcely glossy
• Colour whitish to grey-brown and often coated with reddish-brown deposits

Red list status:

• Least concern (lc).

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

iNaturalist: Euglesa casertana at iNaturalist World Species Observations database.

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

Thumbnails for genus Euglesa