MolluscaBase name details
original description
Sowerby, G. B. I. (1842). Descriptions of new species of shells belonging to the genus <i>Cyclostoma</i>, collected by Mr. H. Cuming in the Philippine Islands. <em>Proceedings of the Zoological Society of London.</em> 1842: 80–84. [December]., available online at https://biodiversitylibrary.org/page/30679842
page(s): 81, 82; note: with 2 varieties [details]