Smith, A. B. & Wright, C. W. 2008. British Cretaceous echinoids. Part 8, Atelostomata, 2. Spatangoida (1). Monographs of the Palaeontographical Society 162, 569-635.
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Smith, A. B.; Wright, C. W.
2008
British Cretaceous echinoids. Part 8, Atelostomata, 2. Spatangoida (1)