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Mentioned as nomen nudum in Rossmässler (1835, vol. 2: p. 15) and Villa & Villa (1841: p. 33), who referred the name to Ziegler. Rossmässler considered the taxon an "insignificant variation [of P. corneus]". Mousson (1859: 52-53) was the first to validly the describe the species. Bourguignat (1860: p. 514-515) re-described it, but referred to Mousson (1859).
Rossmässler, E. A. (1835-1837). Iconographie der Land- & Süßwasser- Mollusken, mit vorzüglicher Berücksichtigung der europäischen noch nicht abgebildeten Arten. (1) 1 (1): VI + 1-132. pl. 1-5 [≥ Apr. 1835]; (1) 1 (2): 6 + 1-26. pl. 6-10 [≥ Aug. 1835]; (1) 1 (3): 4 + 1-33. pl. 11-15 [≥ Mar. 1836]; (1) 1 (4): 4 + 1-27. pl. 16-20 [≥ Sept. 1836]; (1) 1 (5/6): 4 + 1–70. pl. 21–30 [≥ Jul. 1837]. [Dresden und Leipzig (Arnoldische Buchhandlung)]. 

Villa, A. & Villa, G.B. (1841). Dispositio systematica Conchyliarum terrestrium et fluviatilium quae adservantur in collectione fratrum Ant. et Jo. Bapt. Villa. Conspectu abnormitatum novarumque specierum descriptionibus adjectis, 62 pp. + 2 pp. Resumptus numeralis specierum + Errata). [≥ April]. Mediolani (Borroni & Scotti). 

Bourguignat, J.R. (1860). Aménités Malacologiques, LXXIII. Note sur les Planorbes européens voisins du <em>corneus</em>. <em>Revue et Magasin de Zoologie pure et appliquée, deuxième série.</em> 11: 512-519. available online at https://www.biodiversitylibrary.org/item/48711#page/516/mode/1up 
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2019-06-13 07:21:31Z
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