Porous Pea Mussel - Euglesa obtusalis

Description

A very small bivalve, up to 3mm, pale in colour, glossy and very tumid - some specimens are almost spherical. Typically found in swampy habitats. The umbo is off-centre, largely appearing as a smoothly rounded extension of the shell. The shell has numerous pores which are more obvious on the inside.

Similar Species

Other Euglesa species.

Identification difficulty
Habitat

Typically found in swampy habitats, particularly those choked with vegetation and debris.

When to see it

All year.

Life History

It is tolerant of habitat dessication.

UK Status

Common but under-recorded.

VC55 Status

Unknown. Probably reasonably common but few records.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species profile

Common names
Porous Pea Mussel
Species group:
Slugs & Snails
Kingdom:
Order:
Family:
Records on NatureSpot:
1
First record:
10/04/2025 (Nicholls, David)
Last record:
10/04/2025 (Nicholls, David)

Total records by month

% of records within its species group

10km squares with records

The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.

In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.

Latest images

Latest records