MolluscaBase taxon details
original description
Nordsieck, H. (1972). Fossile Clausilien, I. Clausilien aus dem Pliozän W-Europas. <em>Archiv für Molluskenkunde.</em> 102(4/6): 165-188.
page(s): 168, 179 [details] Available for editors [request]
original description
(of Monoptychia (Protoptychia) H. Nordsieck, 2007 †) Nordsieck, H. (2007). Worldwide Door Snails (Clausiliidae), Recent and Fossil. ConchBooks, Hackenheim, 214 pp.
page(s): 151 [details] Available for editors [request]