description Archaeocidaris Overview
Archaeocidaris is an extinct genus of echinoids, or sea urchins, known from the Late Devonian through the Late Permian of the Paleozoic era. Fossil material has been reported from Africa, Europe, and North America, and specimens are often incomplete because sea-urchin tests disarticulate after death. Its long, ornamented spines and preserved plates are therefore important identifying material for paleontologists and fossil collectors.
help Archaeocidaris FAQ
What is Archaeocidaris?
Archaeocidaris is an extinct genus of Paleozoic sea urchin. Fossils are especially recognized by their large, ornamented spines, which are often found separately from the test.
When did Archaeocidaris live?
The genus is recorded from the Late Devonian through the Late Permian. That places it in the late Paleozoic era, long before modern sea-urchin communities.
Where have Archaeocidaris fossils been found?
Reported remains occur in regions including Africa, Europe, and North America. Because the spines commonly detached after death, isolated spine fossils can be easier to find than complete specimens.
Why are Archaeocidaris spines important for identification?
Its large, ornamented primary spines are more distinctive than many small fragments of the test. Paleontologists use spine shape and surface ornament to help distinguish Archaeocidaris from other fossil echinoids.
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