Traits name details
original description
Duncan, P. M. (1889). A Revision of the Genera and great Groups of the Echinoidea. <em>Journal of the Linnean Society of London, Zoology.</em> 23(141): 1-311., available online at https://www.biodiversitylibrary.org/page/31595445 page(s): 81-82 [details] 
status source
Smith, A.B. (2016). British Jurassic Regular Echinoids. <em>Monograph of the Palaeontographical Society.</em> 170 (646): 69-176, pls 42-82. page(s): 71 [details]
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