Phanerozonida

Phanerozonida

[‚fan·ə·rō′zän·ə·də]
(invertebrate zoology)
An order of the Asteroidea in which the body margins are defined by two conspicuous series of plates and in which pentamerous symmetry is generally constant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.