MolluscaBase taxon details
original description
(of Trachycystis planissima Connolly, 1925) Connolly, M. (1925). Notes on African non-marine Mollusca, with descriptions of many new species. The Annals and Magazine of Natural History, (9) 15 (88): 457-479, pl. 28. London. [1 April].
page(s): 472, pl. 28, fig. 12. [details]