Ptychotrema is a genus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the subfamily Enneinae of the family Streptaxidae.MolluscaBase eds. (2022). MolluscaBase. Ptychotrema L. Pfeiffer, 1853. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=996769 on 2022-03-01
Distribution The distribution of the genus Ptychotrema is Afrotropical, and includes:Sutcharit C., Naggs F., Wade C. M., Fontanilla I. & Panha S. (2010). "The new family Diapheridae, a new species of Diaphera Albers from Thailand, and the position of the Diapheridae within a molecular phylogeny of the Streptaxoidea (Pulmonata: Stylommatophora)". Zoological Journal of the Linnean Society 160: 1-16. . UgandaWronski T. & Hausdorf B. (2010). "Diversity and body-size patterns of land snails in rain forests in Uganda". Journal of Molluscan Studies 76(1): 87-100. .
Species Species within the genus Ptychotrema include: Ptychotrema aequatoriale Pilsbry, 1919 Ptychotrema bequaerti (Dautzenberg & Germain, 1914) Ptychotrema cossyphae van Bruggen, 1989 Ptychotrema fraterculus Pilsbry, 1919 Ptychotrema geminatum (Martens, 1895) Pilsbry H. A. (1919). "A review of the land mollusks of the Belgian Congo chiefly based on the collection of the American Museum Congo Expedition, 1909–1915". Bulletin of the American Museum of Natural History 40(1): 1-370. page 200-201. Ptychotrema goossensi (Adam & van Goethem, 1978) Ptychotrema kerereense (Adam & van Goethem, 1978) Ptychotrema kigeziense (Preston, 1913) Ptychotrema mazumbiensis Tattersfield, 1999 Ptychotrema paradoxulum (Martens, 1895) Ptychotrema pelengeense (Adam & van Goethem, 1978) Ptychotrema pollonerae Preston, 1913 Ptychotrema runsoranum (Martens, 1892) Ptychotrema silvaticum Pilsbry, 1919 Ptychotrema usambarense Verdcourt, 1958 References
Bruggen A. C. van (1989) "Studies on Parennea (Mollusca, Gastropoda Pulmonata, Streptaxidae) additional to the revision by Adam & van Goethem, 1978". Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen (series C) 92: 1-56.
Further reading Adam W. & van Goethem J. L. (1978). Revision du sous-genre Parennea Pilsbry du Genre Ptychotrema Morch (Mollusca-Pulmonata-Streptaxidae)". Études du Continent Africain, Bruxelles 5: 1-79. Oke O. C. & Odiete W.O. (1996). "New species of land molluscs from south western Nigeria I. A new species attributed to Ptychotrema (Mollusca, Gastropoda)". Journal of African Zoology 110: 99–104. Verdcourt B. (1985). "New taxa of Gulella L. Pfr. and Ptychotrema Mörch (Mollusca, Streptaxidae) from Eastern Africa". Journal of Conchology 32(1): 109–122. abstract.