''Clypeidae'' is a family of
sea urchin
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ...
s belonging to the order
Clypeasteroida.
Fossil record
This family is known in the fossil record from the
Jurassic (
Bajocian age) to
Cretaceous (
Santonian
The Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series. It spans the time between 86.3 ± 0.7 mya (million years ago) and 83.6 ± 0.7 mya. The ...
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
). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
,
Ukraine, the
United Arab Emirates,
Chile,
Ethiopia,
Germany,
India,
Kenya,
Madagascar,
Poland,
Saudi Arabia,
Somalia,
Tunisia,
United Kingdom and
United States.
Genera
Genera within this family include:
*''
Astrolampas'' Pomel 1883
*''
Clypeus'' Leske 1778
*''
Colliclypeus'' Smith 1991
*''
Pseudopygurus''
*''
Pygurus'' Agassiz 1839
References
External links
{{Taxonbar, from=Q18920885
Clypeasteroida
Echinoderm families