Blake, J. F. (1880). On the Portland rocks of England. <em>The Quarterly Journal of the Geological Society of London.</em> 36: 189-236; plates VIII-X., available online athttps://www.biodiversitylibrary.org/page/36090532 page(s): 230; plate IX, fig. 4 [details]
original descriptionBlake, J. F. (1880). On the Portland rocks of England. <em>The Quarterly Journal of the Geological Society of London.</em> 36: 189-236; plates VIII-X., available online athttps://www.biodiversitylibrary.org/page/36090532 page(s): 230; plate IX, fig. 4 [details]
basis of recordCossmann, M. (1921). Essais de paléoconchologie comparée. Douzième livraison. Paris: [the author]. 349 pp., plates A-D, 1-6., available online athttp://biodiversitylibrary.org/page/37199513 page(s): 66 [details]
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