Traits taxon details
original description
(of Helix silvana Klein, 1853 †) Klein, A. (1853). Conchylien der Süsswasserkalkformation Württembergs. Jahreshefte des Vereins für vaterländische Naturkunde in Württemberg. 9, 203-223., available online at https://www.biodiversitylibrary.org/page/7983357 page(s): 205-206, pl. 5, fig. 2 [details] 
original description
(of Helix malleolata F. Sandberger, 1875 †) Sandberger, C.L.F. (1870-1875). <i>Die Land- und Süßwasser-Conchylien der Vorwelt</i>. C. W. Kreidel, Wiesbaden. [pp. 1-96, pl. 1-12 (1870); pp. 97-160, pl. 13-20 (1871); pp. 161-256, pl. 21-32 (1873); pp. 257-352, pl. 33-36 (1874); pp i-viii, 353-1000 (1875) according to Woodward, 1906]. , available online at https://biodiversitylibrary.org/page/49567154 page(s): 594 [details] 
basis of record
Salvador, R. B.; Rasser, M. W. (2016). Fossil land and freshwater gastropods from the Middle Miocene of Bechingen and Daugendorf, southwestern Germany. <em>Archiv für Molluskenkunde.</em> 145(1): 111-124., available online at https://doi.org/10.1127/arch.moll/1869-0963/145/111-124 page(s): 116, figs 20-22 [details]
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