Definition

Noun: - A taxonomic subclass of echinoderms: This term refers to a major scientific classification group within the class Ophiuroidea, comprising the brittle stars and basket stars. Members of this subclass are characterized by their distinct central disc and long, slender, flexible arms that are clearly demarcated from the disc.

Usage Examples

• Noun:
  • The subclass Ophiurida includes many common species of brittle stars found on ocean floors worldwide.
  • Marine biologists study the subclass Ophiurida to understand echinoderm evolution.

Advanced Usage

• In taxonomic hierarchy: The term is used in formal biological classification to denote a rank below "class" and above "order."
  • The species was reclassified and placed within the subclass Ophiurida.

Variants and Related Words

• Ophiurida (noun): The same taxonomic group; often used interchangeably as the name of the subclass.
• Ophiuroid (noun/adjective): A member of the class Ophiuroidea, which includes the subclass Ophiurida; or relating to that class.
  • Ophiuroid morphology is fascinating.
• Brittle star (noun): The common name for most animals within this subclass, referring to their easily broken arms.

Synonyms

• Brittle stars (common name)
• Ophiurids (informal scientific term)

Related Phrases

• "Member of Ophiurida": A phrase used to specify an organism's taxonomic placement.
  • This fossil is identified as a member of Ophiurida.

Noun

1. brittle stars