MolluscaBase name details
original description
Sowerby, G. B. II. (1877). Monograph of the genus <i>Planorbis</i>. In: <i>Conchologia iconica, or illustrations of the shells of molluscous animals</i>, vol. 20: pls 1-14 and unpaginated text. L. Reeve & Co., London. [1877, no month date]. , available online at https://www.biodiversitylibrary.org/page/8230441
page(s): pl. 12, figs. 104a–b [details]