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Clypeus plotii (aboral)
Description Aboral side: With the five narrow ambulacra the test still resembles in appearance that of a regular echinoid. But as the periproct has moved out from the apical system, lying immediately posterior in a deeply depressed groove, the echinoid is bilaterally symmetrical with a clearly defined anterior and posterior.Length 102 mm; Middle Jurassic, England.
HM JPG file - 217.78 kB - 976 x 962 pixels added on 2005-02-23198 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke
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