MolluscaBase name details
original description
(of Umbrella rugulosa Koenen, 1892 †) Koenen, A.v. (1892). Das Norddeutsche Unter-Oligocän und seine Mollusken-Fauna. Lieferung IV: Rissoidae - Littorinidae - Turbinidae - Haliotidae - Fissurellidae - Calyptraeidae - Patellidae. II. Gastropoda Opisthobranchiata. III. Gastropoda Polyplacophora. 2. Scaphopoda - 3. Pteropoda - 4. Cephalopoda. <em>Abhandlungen zur geologischen Specialkarte von Preussen und den Thüringischen Staaten.</em> 10(4): 819-1004., available online at https://www.biodiversitylibrary.org/page/35938733
page(s): 969, pl. 52, figs 2a-b [details]
basis of record
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): 1730 [details]
status source
Marshall, B. A. (1981). The genus <i>Williamia</i> in the western Pacific (Mollusca: Siphonariidae). <em>New Zealand Journal of Zoology.</em> 8 (4): 487-492., available online at https://www.tandfonline.com/doi/abs/10.1080/03014223.1981.10427972 [details]