Traits taxon details
original description
(of Vertigo (Alaea) kochi O. Boettger, 1889 †) Boettger, O. (1889). Die Entwicklung der Pupa-Arten des Mittelrheingebietes in Zeit und Raum. <em>Jahrbücher des Nassauischen Vereins für Naturkunde.</em> 42: 225-327., available online at https://www.biodiversitylibrary.org/page/7155832 page(s): 304-305, pl. 7, fig. 9 [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): 995-996 [details]
additional source
Harzhauser, M.; Neubauer, T.A. (2018). Opole (Poland) – a historical key locality for middle Miocene terrestrial mollusc faunas. <em>Bulletin of Geosciences.</em> 93(1): 71-146., available online at https://doi.org/10.3140/bull.geosci.1692 page(s): 101 [details] Available for editors 
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