(ofPtychotrema (Parennea) subaequatoriale Adam & Van Goethem, 1978)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): 32, fig. 22. [details] Available for editors
MolluscaBase eds. (2025). MolluscaBase. Ptychotrema subaequatoriale Adam & Van Goethem, 1978. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1529489 on 2025-05-13
Marine Species Traits editorial board (2025). Marine Species Traits. Ptychotrema subaequatoriale Adam & Van Goethem, 1978. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1529489 on 2025-05-13
original description(ofPtychotrema (Parennea) subaequatoriale Adam & Van Goethem, 1978)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): 32, fig. 22. [details] Available for editors