Clypeidae

Clypeidae; Temporal range: Jurassic – Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N [1]
	Fossil of Pygurus tenuis on display at Senckenberg Museum
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Subclass:	Euechinoidea
Infraclass:	Irregularia
Superorder:	Gnathostomata
Order:	Clypeasteroida
Family:	Clypeidae †; Lambert 1898

Clypeidae is a family of sea urchins belonging to the order Clypeasteroida.

Fossil record

This family is known in the fossil record from the Jurassic (Bajocian age) to Cretaceous Santonian age) (age range: from about 164.7 to 94.3 million years ago). Fossils of species within this genus have been found in Egypt, France, Portugal, Saudi Arabia, Switzerland, Ukraine, the United Arab Emirates, Chile, Ethiopia, Germany, India, Kenya, Madagascar, Poland, Saudi Arabia, Somalia, Tunisia, United Kingdom and United States. [1]

Genera within this family include: [1]

gollark: u is just what people who can't type µ or μ say for micro.

gollark: It's consistently atrociously terrible, yes.

gollark: Having to multiply and divide by a thousand all the time for various units was so mildly annoying when I did chemistry last year.

gollark: A 1g reference would have been small and thus uncool.

gollark: Maybe because the kilogram was based on an actual physical object until recently.

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