Bivalve shells collection Sea shell - Bivalve shell

Bivalve shell collection in excellent condition, from private collection. (suitcase not included!)

See Google info below.

A bivalve shell is the two-part, hinged protective outer covering of a bivalve mollusk, such as a mussel, oyster, clam, or scallop, consisting of two calcium carbonate valves that enclose the soft parts of the animal. These valves are connected by a ligament and often have teeth for a secure closure. This shell, secreted by the mantle, serves as protection and provides attachment points for muscles, allowing the animal to move or burrow.
Features
Two valves: The name 'bivalve' refers to the two halves of the shell, which are often mirror images of each other.
Hinge: The flaps are connected by an elastic ligament, often with interlocking teeth for extra strength and alignment.
Composition: Made of calcium carbonate, embedded in an organic matrix, with an outer organic layer (periostracum).
Function: Protection against predators and physical damage, and it helps with movement (sometimes by hitting the valves).
Variation: shells can vary in shape, size, and the presence of ribs or other structures, which aids in identification.
Examples of Bivalves
Mussels (Mosselen)
Oysters (Oesters)
Scallops (Sint-jakobsschelpen)
Clams (Vongole, Venusschelpen)

Only EU