Kingdom Animalia Family Hemicidaridae Rank Genus | Infraclass Carinacea Phylum Echinodermata Subclass Euechinoidea | |
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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
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(Text) CC BY-SA