Diadematacea

Diadematacia Temporal range: Late Triassic–Recent PreЄ Є O S D C P T J K Pg N

Echinothrix diadema
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Subclass:	Euechinoidea
Superorder:	Diadematacia
Orders
Diadematoida Echinothurioida Pedinoida

Diadematacia is a superorder of sea urchins. Unlike most other sea urchins, they generally have hollow spines. The tubercles on their test are perforated, and most species possess gills.

References

Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 980. ISBN 0-03-056747-5.

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