Arca

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Definition

Noun 1. A genus of bivalve mollusks: Arca is the type genus of the family Arcidae, comprising marine mollusks commonly known as ark shells and blood clams. These are characterized by their boat-shaped, often ribbed shells with a straight hinge line bearing numerous small teeth.

Examples of Usage
  • Noun:
    • The fossil record contains many specimens of the genus Arca.
    • Marine biologists study the morphology of Arca to understand bivalve evolution.
Advanced Usage
  • In taxonomic context: The name is used in scientific classification to group a specific set of species within the family Arcidae.
    • The species was reclassified and placed under the genus Arca.
Variants and Related Words
  • Arcidae (n): The biological family to which the genus belongs.
  • Ark shell (n): A common name for many species within the genus and related genera, referring to the shell's boat-like shape.
  • Blood clam (n): A common name for some species, particularly those with red hemoglobin-like fluid, often associated with the genus and related genera like .
Synonyms
  • Ark shell (common name)
  • Blood clam (common name for some species)
Related Phrases
  • Genus Arca: The standard scientific phrase used to specify this taxonomic group.
    • The specimen was identified as belonging to genus Arca.
Noun
  1. type genus of the family Arcidae: ark shells and blood clams

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