original description(ofNematurella sieversii Clessin, 1887)Dybowski, W. (1887-1888). Die Gasteropoden-Fauna des Kaspischen Meeres. Nach der Sammlung des Akademikers Dr. K. E. v. Baer. <em>Malakozoologische Blätter (Neue Folge).</em> 10(1): 1-64 (1887); 10(2): 65-79 (1888); 10(3): pls 1-3 (1888)., available online athttps://www.biodiversitylibrary.org/page/35483241 page(s): 45-46 [details]
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