MolluscaBase name details
original description
(of Helix zeus Jonas, 1843) Jonas, D. H. (1843). Descriptions of new species of shells belonging to the genera <i>Helix</i> and <i>Bulimus</i>, collected by Mr. Cuming in the Philippine Islands. <em>Proceedings of the Zoological Society of London.</em> 10 ["1842"]: 188-189., available online at https://biodiversitylibrary.org/page/30679950
page(s): 188 [details]
basis of record
Bartsch, P. (1939). A synopsis of Philippine land mollusks of the subgenera <i>Lamarckiella</i> and <i>Pararyssota</i> of the genus <i>Ryssota</i>. <em>Proceedings of the Biological Society of Washington.</em> 52: 41-56., available online at https://www.biodiversitylibrary.org/page/34606390
page(s): 47 [details]