MolluscaBase name details
original description
(of Ennea ansorgei Preston, 1910) Preston, H.B. (1910). Notes on a small collection of terrestrial shells from Angola, with descriptions of new species. Proceedings of the Malacological Society of London, 9 (1): 51-55. London [31 March]., available online at https://www.biodiversitylibrary.org/page/30824837 page(s): 51, textfig. [details]
basis of record
Adam, W.; Bruggen, A. C. van; Van Goethem, J. L. (1994). Études sur les mollusques terrestres de l'Afrique, à partir des notes de feu le Dr William Adam. 2. <i>Ptychotrema</i> (<i>Ennea</i>) H. & A. Adams, 1855 (Gastropoda Pulmonata: Streptaxidae). <em>Bulletin de l'Institute Royal des Sciences Naturelles de Belgique, Biologie.</em> 64: 71-97., available online at https://biblio.naturalsciences.be/rbins-publications/bulletin-of-the-royal-belgian-institute-of-natural-sciences-biologie/64-1994/biologie-1994-64_71-97.pdf page(s): 73 [details]
additional source
Brown, K. (2023). A guide to the hunter shells. Vol. 2. The Streptaxoidea. The Enneinae, Orthogibbinae, Marconiinae, Odontartemoninae, Streptaxinae and the Diapheridae. ConchBooks, Germany. page(s): 104 [details]
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