Definitions
Sheath
- In cirripeds (Balanomorpha), thickened upper part of internal shell wall and alae forming cylindrical collar to which opercular membrane is attached. [Moore and McCormick, 1969]
- (Taxon-specific: Subclass Cirripedia) (Figure only.) [Anderson, 1980]Balanus trigonus: wall plates, exploded; and interior of operculum. [Anderson, 1980]
- (Taxon-specific: Subclass Cirripedia) Barnacle shell feature: in unstalked form, collar-like structure inside shell. Formed by thickened upper parts (parieties, alae) of compartmental plates; serves as site of attachment of opercular membrane. [Stachowitsch, 1992]
- (Taxon-specific: Subclass Cirripedia) Cyrlindrical structure inside shell, consisting of alae and thickened upper part of parietes, greatly strengthening orifice and providing for attachment of opercular membrane. [McLaughlin, 1980]
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