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): 488-489, unnumbered plate, fig. 5 [details]
source of synonymy
Wenz, W. (1923-1930). Fossilium Catalogus I: Animalia. Gastropoda extramarina tertiaria. W. Junk, Berlin. Vol. I: 1-352 pp. (1923), Vol. II: 353-736 pp. (1923), Vol. III: 737-1068 pp. (1923), Vol. IV: 1069-1420 pp. (1923), Vol. V: 1421-1734 pp. (1923), Vol. VI: 1735-1862 pp. (1923), Vol. VII: 1863-2230 pp. (1926), Vol. VIII: 2231-2502 pp. (1928), Vol. IX: 2503-2886 pp. (1929), Vol. X: 2887-3014 pp. (1929), Vol. XI: 3015-3387 pp. (1930)., available online at http://biodiversitylibrary.org/bibliography/61839#/summary
page(s): 1607 [details]
From editor or global species database
Synonymy Hilgendorf (1867) listed "Valvata multif. var. planorbiformis v. Klein etc." in synonymy of his new variety, but it is uncertain if he considered Klein's record a misidentification or if he intended to synonymize the taxon (originally described by Zieten, 1832), which would make it a junior objective synonym. Wenz (1923) synonymized Hilgendorf's name with Zieten's without any comment. [details]