Traits taxon details
original description
Smith, A.B. 2011. Gymnodiadema and the Jurassic roots of the Arbacioida (stirodont echinoids). Swiss Journal of Palaeontology, 130/1, 155-171., available online at https://doi.org/10.1007/s13358-010-0014-z page(s): 169-170; figs 2a-d, 3a-f, 4a-f [details]
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