original description(ofTrachycystis pycnotrichia Melvill & Ponsonby, 1899)Melvill, J. C. & Ponsonby, J. H. (1899). Further contribution towards a check-list of the non-marine molluscan fauna of South Africa, with descriptions of fourteen new species. <em>The Annals and Magazine of Natural History.</em> (7) 4 (21): 192-200, pl. 3. London. [31 August]., available online athttps://www.biodiversitylibrary.org/page/19208927 page(s): 197, pl. 3, figs 7-7b [details]
Present Inaccurate Introduced: alien Containing type locality
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