As this ontology is generalizing to molluscs (see #5), tracking here: * [ ] byssus * [ ] byssus thread * [ ] abductin-like part of byssus thread * [ ] collagen-like part of byssus thread * [ ] elastin-like part of byssus thread * [ ] silk-like part of byssus thread * [ ] bivalve shell * [ ] mollusc shell material * [ ] crossed lamellar shell material * [ ] bivalve hinge ligament * [ ] conch shell * [ ] aragonite hard lens * [ ] calcite hard lens
As this ontology is generalizing to molluscs (see #5), tracking here: