Tiny hedge ditch bivalve

Tiny hedge ditch  bivalve

Observation - Tiny hedge ditch bivalve. Description: A 1.3mm bivalve found among moss in the bottom of a damp, muddy ditch running alongside a hedgerow. I would welcome an identification please.

A 1.3mm bivalve found among moss in the bottom of a damp, muddy ditch running alongside a hedgerow. I would welcome an identification please.