Traits name details
original description
Baily, W. H. (1855). Description of some Cretaceous fossils from South Africa. <em>Quarterly Journal of the Geological Society of London.</em> 11, 454-465., available online at https://www.biodiversitylibrary.org/page/35615046 page(s): 458, pl. 12, fig. 7 [details] 
additional source
Gabb, W. M. (1861). Synopsis of the Mollusca of the Cretaceous Formation, including the geographical and stratigraphical range and synonymy. <em>Proceedings of the American Philosophical Society.</em> 8: 57-257 [offprint pp. 1-201]., available online at https://www.biodiversitylibrary.org/page/27023653 page(s): p. 145. [details] 
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