original description
(of Bithynia pisidica Oppenheim, 1919 †) Oppenheim, P. (1919). Das Neogen in Kleinasien. <em>Zeitschrift der Deutschen Geologischen Gesellschaft.</em> 70, 1–210, 12 pls.
page(s): 208-209, pl. 7, figs 7-9, pl. 9, 1-2 [details]
additional source
Kadolsky, D. (1993). Der Gattung <em>Nystia</em> zugeordnete Arten im Tertiär des mittleren und westlichen Europas (Gastropoda: Rissooidea). <em>Archiv für Molluskenkunde.</em> 122: 335-402. [details] Available for editors [request]
status source
Schlickum, W. R. (1968). Die Gattungen <em>Briardia</em> Munier-Chalmas und <em>Nystia</em> Tournouer. <em>Archiv für Molluskenkunde.</em> 98: 39-51.
page(s): 44 [details] Available for editors [request]
From editor or global species database
New combination Original combination retained, combination with Nystia suggested by Schlickum (1968) not accepted (the genus is restricted to the Paleogene after Kadolsky 1993). [details]