FreshGEN name details
original description
Hilgendorf, F. (1867). Über <em>Planorbis multiformis</em> im Steinheimer Süßwasserkalk. <em>Monatsberichte der Königlich-Preussischen Akademie der Wissenschaften zu Berlin.</em> 1866: 474-504., available online at https://www.biodiversitylibrary.org/page/39053038 page(s): 487, unnumbered plate, fig. 15 [details]
additional source
Rasser, M. W. (2013). Evolution in isolation: the Gyraulus species flock from Miocene Lake Steinheim revisited. <em>Hydrobiologia.</em> 739(1): 7-24., available online at https://doi.org/10.1007/s10750-013-1677-4 [details] Available for editors [request]
From editor or global species database
Status P. multiformis minutus Hilgendorf, 1867 is invalid for it is a junior homonym of P. minutus Serres, 1829. No replacement has been introduced. Wenz (1923) proposed P. multiformis minutus Hilgendorf, 1867 to be a junior synonym of P. subhemistoma d'Orbigny, 1852, which he ranked as subspecies of G. trochiformis. However, that synonymization was not adopted by later authors, who considered G. minutus a distinct species (e.g., Rasser 2013). In order to bring stability to this issue, it is proposed here to accept the synonymization by Wenz but treat the taxon as distinct species. [details]
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