Euechinoidea


Also found in: Wikipedia.

Euechinoidea

[yü‚ek·ə′nȯid·ē·ə]
(invertebrate zoology)
A subclass of echinoderms in the class Echinoidea; distinguished by the relative stability of ambulacra and interambulacra.
References in periodicals archive ?
Class ECHINODERMATA Subclass Euechinoidea Superorder Gnathostomata Order Clypeasteroida Suborder Clypeasterina Family Clypeasteridae Genus Clypeaster LAMARCK, 1801 Clypeaster aff.