original description
(of Gulella assiniensis Chaper, 1885) Chaper M. (1885). Description de quelques espèces et genres nouveaux de coquilles vivantes de diverses provenances. <em>Bulletin de la Société Zoologique de France.</em> 10: 42-54., available online at https://www.biodiversitylibrary.org/page/11305764
page(s): 53, pl. 1, figs 16-18. [details]
original description
(of Ennea (Ptychotrema) bassamensis E. A. Smith, 1894) Smith, E. A. (1894). Descriptions of two new species of shells of the genus <i>Ennea</i>. <em>Proceedings of the Zoological Society of London.</em> (1893): 642-643., available online at https://www.biodiversitylibrary.org/page/35992960
page(s): 642, text fig. [details]
basis of record
Adam, W.; Bruggen, A. C. van; Van Goethem, J. L. (1995). Études sur les mollusques terrestres de l'Afrique, à partir des notes de feu le Dr William Adam. 3. <i>Ptychotrema</i> (<i>Ptychotrema</i> s.s., <i>Adjua, Excisa, Mirellia, Nsendwea, Ptychoon, Sphinctostrema</i>) (Gastropoda Pulmonata: Streptaxidae). <em>Bulletin de l'Institute Royal des Sciences Naturelles de Belgique, Biologie.</em> 65: 89-115., available online at https://biblio.naturalsciences.be/rbins-publications/bulletin-of-the-royal-belgian-institute-of-natural-sciences-biologie/65-1995/biologie-1995-65_89-115.pdf
page(s): 101 [details]
From editor or global species database