original description(ofHelix sphaerica G. B. Sowerby I, 1841)Sowerby, G. B. I. (1841). Descriptions of new species of the family Helicidae, collected by Mr. H. Cuming in the Philippine Islands (continuation). <em>Proceedings of the Zoological Society of London.</em> 9: 24–26. [October]., available online athttps://biodiversitylibrary.org/page/30679646 page(s): 26 [details]