Galeommatoidea

Galeommatoidea is a superfamily of bivalves classified in the monotypic order Galeommatida.

Galeommatoids exhibit symbiotic relationships with many different groups of benthic and burrowing invertebrates. An ectocommensal species, "Parabonia" squillina, has been found to be nearly mutually exclusive with burrow-wall commensal species of Lysiosquilla. Galeommatoids are capable of active locomotion, crawling on their foot like a snail.