The Echinoid Directory

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Ressopygus constantini Cotteau, 1871; apical disc. Specimem BMNH E4248.

Barras, C. G. 2006. British Jurassic irregular echinoids. Monograph of the Palaeontographical Society no. 625 (part of volume 159 for 2005), 1-168, pls 1-14.