Edrioasteroid - Hutchinson encyclopedia article about Edrioasteroid Printer Friendly
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Edrioasteroidea
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Edrioasteroidea

Small group of extinct Palaeozoic echinoderms. The movable plates protecting the five food grooves and the presence of spines anticipate the sea urchins and make the class important as a link between living and fossil Echinodermata.



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The hardground that was formed on ripple marks served later as the substrate for the colonization of new organisms, for example, the edrioasteroid echinoderm Cyathocystis occurring abundantly in reefs (Fig.
Ripple marks as indicators of Late Ordovician sedimentary ... by Hints, Linda; Miidel, Avo / Estonian Journal of Earth Sciences
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