MolluscaBase name details
original description
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): 53, fig. 40. [details] Available for editors [request]
additional source
Brown, K. (2021). A guide to the hunter shells. Vol.1. The Streptaxoidea. The Gulellinae and Primigulellinae. ConchBooks, Germany. page(s): 542. [details]
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