MolluscaBase taxon details
original description
Degner, E. (1934). Westafrikanische Landschnecken. I. Streptaxiden, Helicarioniden, Vaginuliden. <em>Zoologishe Jahrbücher, Abt. für Systematik.</em> 65: 209–308.
page(s): 236, figs 18, 19. [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): 92 [details]