MolluscaBase taxon details
original description
(of Trachycystis cressyi Connolly, 1925) Connolly, M. (1925). The non-marine Mollusca of Portuguese East Africa. Transactions of the Royal Society of South Africa, 12 (3): 105-220, pl. 4-8. Cape Town. [March].
page(s): 142, pl. 4, fig. 11. [details]