Diadematacea Temporal range: Late Triassic–Recent PreꞒ Ꞓ 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:	Diadematacea Duncan, 1889
Orders
Diadematoida Micropygoida

The Diadematacea 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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