original description
(of Theodoxia ferussaci Locard, 1893 †) Locard, A. (1893). Monographie des mollusques tertiaires terrestres et fluviatiles de la Suisse. Deuxième partie. <em>Mémoires de la Société Paléontologique Suisse.</em> 19, 131-275.
page(s): 228-229, pl. 11, fig. 10 [details]
additional source
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): 3001 [details]
From editor or global species database
Homonymy Wenz (1919) introduced Theodoxis helvetica as new name for Theodoxia [sic] ferussaci Locard, 1893, non Neritina ferussaci Recluz, 1850, apparently by Wenz considered to be congeneric. Although no homonymy exists at present, the secondary homonym was replaced before 1961 and is thus permanently invalid (ICZN Art. 59.3). [details]