Definitions
Opercular membrane
- Thin, flexible membrane attaching opercular valves to sheath, periodically shed during ecdysis, in balanomorph Cirripedia; represented by membranous hinge in verrucomorph Cirripedia. [McLaughlin, 1980]
- (Taxon-specific: Subclass Cirripedia) Barnacle shell feature: in unstalked form, thin, flexible membrane attaching opercular valves (scuta, terga) to sheath. [Stachowitsch, 1992]