Bivalve shell

Parallel parking

These long, narrow bivalves are mostly oriented in one direction, parallel to the prevailing water current when they lay upon the seabed. An alternative explanation is that they attached to wood and even dead ammonite shells and are therefore more likely to be orientated to some degree rather than randomly placed.

Find out more about bivalves on the molluscs pages.

Common name

Bivalve shell

Scientific name

Gervilla

Type

Molluscs > Bivalves


Strata

Lower Lias

Time period

Lower Jurassic

Age

195 million years

Where found

Lyme Regis

Found by

Found by Paul C Ensom in 1979

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.03077i