Class
Echinoidea
Cầu gai
12 species in this taxon
class of marine invertebrates Echinoidea (Echinoidea) is a class of organisms united by key anatomical and physiological traits. It contains 4 orders with 12 known species. This includes the order groups Arbacioida, Camarodonta, Echinolampadacea, and Spatangoida. It belongs to Echinoderms (Echinodermata).
