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See also:
  • Discovering Fossils: What is an Echinoid? - 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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  • echinoderm - An article discussing living and extinct echinoderms, including a selection of photographs.
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  • Echinoderms - Information about echinoderms in Australia including their biology, anatomy, behaviour, reproduction, predators, prey and ecology.
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  • Peer's Echinoid Pages - Information about and images of echinoids from the Cretaceous Period (Maastrichtian) from the Netherlands.
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  • This View of Life: Bilateral Echinoderm Confirms Ancestry - Article describing newly discovered Ctenoimbricata spinosa, a new genus and species within the echinodermata phylum.
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Last update: March 24, 2016 at 3:27:19 UTC - edit