MolluscaBase taxon details
original description
(of Ptychotrema (Parennea) usambarense Verdcourt, 1958) Verdcourt, B. (1958). A new species of Ptychotrema Mörch (Mollusca: Gastropoda) from Tanganyika together with a check list of the East African species and keys for their determination. <em>Journal of the Linnean Society of London.</em> 43: 714-720.
page(s): 714. [details] Available for editors [request]
basis of record
Adam, W.; Van Goethem, J. L. (1978). Revision du sous-genre Parennea Pilsbry du genre Ptychotrema Mörch (Mollusca-Pulmonata-Streptaxidae). <em>Études du Continent Africain.</em> 5: 1-79.
page(s): 43, fig. 33. [details] Available for editors [request]