Kingdom Animalia Higher classification Euechinoidea Subclass Euechinoidea | Phylum Echinodermata Rank Superorder | |
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Similar Echinoderm, Sea urchin, Euechinoidea, Perischoechinoidea, Atelostomata | ||
The Diadematacia form a superorder of sea urchins. Unlike most other sea urchins, they generally have hollow spines. The tubercles on their tests are perforated, and most species possess gills.
References
Diadematacea Wikipedia(Text) CC BY-SA