MolluscaBase taxon details
original description
(of Ptychostylus Möllendorff, 1888) Möllendorff, O. F. von. (1888). Mittheilungen aus dem Gebiete der Malakozoologie von den Philippinen. <em>Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft.</em> 20(5/6): 65-90., available online at https://biodiversitylibrary.org/page/15599718 page(s): 74 [details]
original description
(of Helix (Pachya) Albers, 1850) Albers, J. C. (1850). Die Heliceen nach natürlicher Verwandtschaft systematisch geordnet. <em>Berlin: Enslin.</em> 262 pp., available online at https://www.biodiversitylibrary.org/page/11965983 page(s): 107 [details]
original description
(of Cochlostyla (Ptychostylus) Möllendorff, 1888) Möllendorff, O. F. von. (1888). Mittheilungen aus dem Gebiete der Malakozoologie von den Philippinen. <em>Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft.</em> 20(5/6): 65-90., available online at https://biodiversitylibrary.org/page/15599718 page(s): 74 [details]
original description
(of Cochlostyla (Hypoptychus) Pilsbry, 1893) 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]
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