asteriidæ

from The Century Dictionary.

• A family of echinoderms, of the order Asteroidea, the starfishes, class Asteroidea or Stellerida, represented by such genera as Asterias or Astropecten and Luidia, having four rows of pedicellate feet in each ray. Also Asteridæ, and, less correctly, Asteriadæ.
• A family of asteroid Stellaroidea, of the order Cryptozonia, having opposite ambulacral ossicles, tube-feet in four rows, and an abactinal skeleton reticular and consisting of small unequal plates. It includes Asterias, Anasterias, Uniophora, and several other genera.