The Collaborative International Dictionary of English v.0.48:

Antedonidae \Antedonidae\ prop. n.
   A natural family of feather stars; formerly called family
   Comatulidae.

   Syn: family Antedonidae
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Antedonidae
    n 1: feather stars [syn: Antedonidae, family Antedonidae]