MolluscaBase taxon details
original description
(of Pyramidula (Gonyodiscus) lamellifera E. A. Smith, 1903) Smith, E. A. (1903). Descriptions of new species of land shells from Central Africa. <em>Journal of Conchology.</em> 10: 315–319., available online at https://www.biodiversitylibrary.org/page/31650135
page(s): 317, pl. 4, fig. 15. [details]
original description
(of Trachycystis rugosa Preston, 1911) Preston, H.B. (1911). Descriptions of thirty-six new species of land and freshwater shells from British East Africa, chiefly from Mount Kenia and the neighbouring district. The Annals and Magazine of Natural History, (8) 7 (41): 463-476, pl. 11-12. London. [29 April]., available online at https://biodiversitylibrary.org/page/15815183
page(s): 468, pl. 11, fig. 16. [details]