original description
(of Pterocyclus aspersus Bullen, 1906) Bullen, R. A. (1906). On some land and fresh-water Mollusca from Sumatra. Part II. <em>Proceedings of the Malacological Society of London.</em> 7(3): 126-130., available online at https://www.biodiversitylibrary.org/page/15797584
page(s): 129 [details]
basis of record
Sutcharit, C., Ablett, J. D. & Panha, S. (2019). An annotated type catalogue of seven genera of operculate land snails (Caenogastropoda, Cyclophoridae) in the Natural History Museum, London. <em>ZooKeys.</em> 842: 1–65.
page(s): 8, Fig. 1K, L [details] Available for editors [request]
additional source
Thach N. N. (2020). New shells of South Asia. Volume 2. Seashells*Freshwater*Land snails. With one New Genus and 140 New Species & Subspecies, Reply to comments made in error. <em>48HRBooks Company, Akron, Ohio, USA.</em> 189 pp.
page(s): 17, fig. 147 [details] Available for editors [request]
From editor or global species database