Diadematacea

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

Last updated June 01, 2025

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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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