Clypeidae

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

Clypeidae
Temporal range: JurassicCretaceous [1]
Fossil of Pygurus tenuis on display at Senckenberg Museum
Scientific classification
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Clypeidae

Lambert 1898

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

Genera within this family include: [1]

  • Astrolampas Pomel 1883
  • Clypeus Leske 1778
  • Colliclypeus Smith 1991
  • Pseudopygurus
  • Pygurus Agassiz 1839
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.

References

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