arca
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
-
type genus of the family Arcidae: ark shells and blood clams
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