Echinoderms Invertebrates Paleontology Earth Sciences

Provides photographs and information on echinoids, or sea urchins, the arrival of regular species in the fossil record in the Cambrian and the appearance of irregular ones in the Jurassic.

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• Micraster coranguinum - Photographs of this irregular echinoid from the Late invertebrates Cretaceous, found invertebrates in Croydon, UK.
• Peer's Echinoid Pages - Information about and images of echinoids from the invertebrates Cretaceous Period paleontology (Maastrichtian) from the Netherlands.
• 9th International Echinoderm Conference - Links to abstracts.
• Discovering Fossils: What is an Echinoid? - Provides photographs and information on echinoids, or sea urchins, the invertebrates arrival of regular species in the fossil record in the invertebrates Cambrian and the appearance of irregular ones in the Jurassic.
• Jurassic Echinoids - Photographs of several fine specimens found in the UK.
• Archaeocidaris urii - Image of fossilised spines of this echinoid from paleontology the Early Carboniferous, found in Cumbria, UK.
• Holectypus hemisphaericus - Images of this echinoid from the Middle Jurassic, found at invertebrates Beaminster, UK.
• Clypeus plotii - Photograph of a fine specimen of this irregular echinoid from the Middle Jurassic.
• Hemicidaris mantochensis - Several photographs of fossilised tests of this echinoid, paleontology found at echinoderms Portlandian, France.

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