Biology:Diadematacia

Short description: Superorder of sea urchins

Diadematacia Temporal range: Late Triassic–Recent PreЄ Є O S D C P T J K Pg N
Echinothrix diadema
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Infraclass:	Acroechinoidea
Superorder:	Diadematacia
Orders
Diadematoida Echinothurioida Pedinoida

The Diadematacia are 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

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

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