Lamellibranchia

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Definition

Noun 1. A taxonomic class of marine and freshwater mollusks: Lamellibranchia is a former or alternative taxonomic class name for bivalve mollusks. These animals are characterized by having a soft body enclosed within a hinged, two-part shell (valves). The name refers to the gill structure, which is typically plate-like or lamellated. 2. Synonym for Bivalvia: In many modern classifications, Lamellibranchia is considered synonymous with the class Bivalvia.

Usage Examples
  • Noun:
    • The fossil record shows that Lamellibranchia were abundant in ancient seas.
    • Marine biologists study the anatomy of Lamellibranchia to understand filter-feeding adaptations.
Advanced Usage
  • In taxonomic literature: The term is used in historical or specialized zoological texts to refer to the bivalve class, emphasizing the structure of their gills (lamellibranchiate gills).
    • The specimen was classified under the order Pectinida within the Lamellibranchia.
Variants and Related Words
  • Lamellibranch (noun/adjective): An individual bivalve mollusk; or describing something related to this class.
    • Oysters are lamellibranch mollusks.
  • Bivalvia (noun): The more commonly used modern class name for the same group of mollusks.
Synonyms
  • Bivalvia: The direct modern synonym.
  • Pelecypoda: Another, less common, former class name for the same group.
Related Terms
  • Mollusk: The larger phylum (Mollusca) to which Lamellibranchia/Bivalvia belongs.
  • Bivalve: The common name for any member of this class, referring to the two-part shell.
  • Filter feeder: A description of the primary feeding method of most lamellibranchiates.
Noun
  1. oysters; clams; scallops; mussels

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