MolluscaBase taxon details
original description
(of Ennea (Ptychotrema) quadrinodata E. von Martens, 1895) Martens, E. von. (1895). Neue Land- und Süsswasser-Schnecken aus Ost-Afrika. <em>Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 27(11–12): 175–187.</em> , available online at https://www.biodiversitylibrary.org/page/15601812
page(s): 177-178. [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): 139 [details]
additional source
Pilsbry, H. A. (1919). A review of the land mollusks of the Belgian Congo chiefly based on the collections of the American Museum Congo Expedition, 1909-1915. <em>Bulletin of the American Museum of Natural History.</em> 40: 1-370, pls I-XXIII.
page(s): 201 [details]