Traits taxon details
original description
(of Helix ruderoides Michaud, 1862 †) Michaud, G. (1862). Description des Coquilles fossiles des environs de Hauterive (Drôme). <em>Journal de Conchyliologie.</em> 10, 58-84., available online at https://www.biodiversitylibrary.org/page/15134773 page(s): 64, pl. 3, figs 9-11 [details] 
basis of record
Schlickum, W.R.; Geissert, F. (1980). Die pliozäne Land- und Süsswassermolluskenfauna von Sessenheim/Krs. Hagenau (Unterelsass). <em>Archiv für Molluskenkunde.</em> 110(4-6): 225-259. page(s): 234-235, pl. 13, fig. 25 [details]
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