MolluscaBase taxon details
original description
(of Planorbis costatus var. distortus Hyatt, 1880 †) Hyatt, A. (1880). The Genesis of the Tertiary Species of Planorbis at Steinheim. Anniversary Memoirs of the Boston Society of Natural History. 1830-1880, 1-114., available online at https://www.biodiversitylibrary.org/page/38167016
page(s): 10, 12-13, 65, pl. 4, fig. 2, pl. 9, pl. 9, figs 27-28 [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]