Cryptozonata

Cryptozonata, that order of Starfishes which includes all those in which the marginal plates are small and inconspicuous, as in the "Common Sand Star" (Asterias). In the other order the marginal ossicles are large, as in Astropecten, and it is therefore known as Phanerozonata. The principal forms included in the Cryptozonata are the "Common Sand Stars" (Asterias) (q.v.), Brisinga and its allies, the Linckias and the "Sun Stars" (Solasteridae).