Definitions
Opercular valve
- Movable plate in orifice of cirriped shell, one of pairs of scuta and terga joined to sheath by opercular membrane. Moore and McCormick, 1969]. [Martin, 2005]
- One of 2 or 4 movable plates occluding aperture in sessile barnacles. [McLaughlin, 1980]
- (Taxon-specific: Subclass Cirripedia) Barnacle shell feature: in unstalked barnacle, calcareous plate forming part of closing apparatus (operculum). Consists of symmetrical forms of both scuta and terga, in asymmetrical forms of single (movable) scutum and single (movable) tergum. Attached to inner wall (sheath) of shell by opercular membrane. [Stachowitsch, 1992]
Copyright
NHMLAC
Design: Dean Pentcheff pentcheff@gmail.com
Citing this glossary: For individual definitions, please cite the specific author(s) of the definition.
To cite the glossary as a whole, please use:
Martin, J.W., N.D. Pentcheff, D. Striley, C. Perrodin, A.R. Wall, J. Wall, and J. Zieba (editors).
Crustacea Glossary. Crustacea Department, Natural History Museum of Los Angeles County.
Accessed:
21 Nov 2024. URL: https://research.nhm.org/glossary