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Definition of Ophiuroidea:
class of echinoderms commonly known as brittle stars, having a star-shaped body with the arms clearly marked off from the central disc.[1]
This is the common definition for Ophiuroidea, other definitions can be discussed in the article


  1. Lawrence, E. (2005). Henderson’s dictionary of biology. Pearson Education Limited, 13th ed., Harlow. 748 p.