Samiksha Jaiswal

Asterocidaris

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Kingdom  Animalia
Family  Hemicidaridae
Rank  Genus
Infraclass  Carinacea
Phylum  Echinodermata
Subclass  Euechinoidea
Asterocidaris httpsuploadwikimediaorgwikipediacommonsthu
Similar  Hemicidaris, Pseudocidaris, Holectypus depressus, Ancyloceratina, Echinolampas

Asterocidaris is a genus of fossils sea urchins in the family Hemicidaridae. These epifaunal grazer-deposit feeders lived in the Middle and Upper Jurassic age (from 171.6 to 161.2 Ma).

Contents

Species

  • Asterocidaris besairiei Lambert, 1936
  • Asterocidaris meandrina (Agassiz 1840)
  • Asterocidaris ragoti Lambert, 1936
  • Description

    These fossil spined echinoid sea urchins can reach a diameter of about 25 millimetres (0.98 in), with spicules of about 69x60mm. They are hemispherical, flattened beneath, with small apical disc.

    Distribution

    Fossils of species within this genus have been found in the Middle to Upper Jurassic sediments (Bajocian-Oxfordian) in Europe, Madagascar and Africa (Morocco).

    References

    Asterocidaris Wikipedia


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