Traits taxon details
original description
(of ) Smith, E. A. (1880). On the shells of Lake Tanganyika and of the neighbourhood of Ujiji, Central Africa. <em>Proceedings of the Zoological Society of London.</em> 1880: 344-352., available online at https://www.biodiversitylibrary.org/page/28522492 page(s): 347, pl. 31, fig. 5. [details]
basis of record
Adam, W.; Bruggen, A. C. van; Van Goethem, J. L. (1993). Études sur les mollusques terrestres de l'Afrique, à partir des notes de feu le Dr William Adam. 1. <i>Ptychotrema</i> (<i>Haplonepion</i>) Pilsbry, 1919 (Gastropoda Pulmonata: Streptaxidae). <em>Bulletin de l'Institute Royal des Sciences Naturelles de Belgique, Biologie.</em> 63: 137-157., available online at https://biblio.naturalsciences.be/rbins-publications/bulletin-of-the-royal-belgian-institute-of-natural-sciences-biologie/63-1993/biologie-1993-63_137-157.pdf page(s): 140 [details]
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