Diadematoida

Diadematoida; Temporal range: Early Jurassic–Recent PreꞒ Ꞓ O S D C P T J K Pg N
	Diadema setosum
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Subclass:	Euechinoidea
Superorder:	Diadematacia
Order:	Diadematoida; Duncan, 1889
Families
	(See Text)

The Diadematoida are an order of sea urchins. They are distinguished from other sea urchins by the fact that their spines are hollow, or at best have an open mesh at the core, and by the presence of 10 buccal plates around the mouth. Their tests can be either solid or flexible.

Taxonomy

According to ITIS :

family Aspidodiadematidae (Duncan, 1889)
family Diadematidae (Gray, 1855)
family Lissodiadematidae (Mortensen, 1903)
family Micropygidae (Duncan, 1889)

According to World Register of Marine Species :

family Diadematidae (Gray, 1855)

gollark: Though we may run into issues as computers stop getting faster as fast as they did.

gollark: It'll probably increase over time.

gollark: Even with root access it's still nightmarishly irritating to do some things.

gollark: But Android makes it hard to run your own apps and stuff and Termux might not actually *work* come Android 10 because of "security" changes.

gollark: Well, that's more of a software thing, admittedly.

References

Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 980. ISBN 0-03-056747-5.
National History Museum. "Diadematoida". Retrieved 20 Dec 2009.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.