MolluscaBase name details
original description
Pilsbry, H. A. (1893). Preliminary outline of a new classification of the helices. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 44: 387-400 [14 February 1893], 401-404 [7 February 1893]., available online at https://www.biodiversitylibrary.org/page/26370165
page(s): 395; note: nom. nov. pro Ptychostylus Möllendorff, 1888, non Sandberger, 1870 [details]