MolluscaBase taxon details
original description
(of Pyrgulina (Pyrguletta) degrangei Cossmann & Peyrot, 1917 †) Cossmann M. & Peyrot A. (1917). Conchologie néogènique de l'Aquitaine. <em>Actes de la Société Linnéenne de Bordeaux.</em> 69(3): 157-284; 69(4): 285-365., available online at https://biodiversitylibrary.org/page/31657755
page(s): 133, pl. 10, figs 79-80 [details]
basis of record
Stein G., Moths H., Albrecht F., Havekost U. & Fehse D. (2016). Revision der Miozänen Molluskenfauna (Hemmoorium) von Werder bei Achim (Nordwest-Niedersachsen). <em>Palaeofocus.</em> 5: 1-289. [details]
additional source
Landau B.M., Micali P., Van Dingenen F. & Ceulemans L. (2020). The upper Miocene gastropods of northwestern France, 7. Pyramidelloidea. <em>Cainozoic Research.</em> 20(2): 279-364. [details]