Stearns, R. E. C. (1900). Fossil land shells of the John Day region with notes on related living species. <em>Proceedings of the Washington Academy of Sciences.</em> 2: 651-660., available online athttps://www.biodiversitylibrary.org/page/8872727 page(s): 653-655, pl. 35, figs 1-3 [details]
Note "The North Fork of John Day River, Oregon, at...
From editor or global species database
Type locality "The North Fork of John Day River, Oregon, at the angle of the big bend, longitude 119° 40', latitude 44° 50" (referring to White 1885, p. 174) [details]
Fossil range Exact age uncertain. Claimed to be from the "John Day group" (today John Day Formation), which roughly ranges in age from...
Fossil range Exact age uncertain. Claimed to be from the "John Day group" (today John Day Formation), which roughly ranges in age from the Bartonian (late Eocene) to the Burdigalian (early Miocene). [details]
original descriptionStearns, R. E. C. (1900). Fossil land shells of the John Day region with notes on related living species. <em>Proceedings of the Washington Academy of Sciences.</em> 2: 651-660., available online athttps://www.biodiversitylibrary.org/page/8872727 page(s): 653-655, pl. 35, figs 1-3 [details]
additional sourceHenderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313. page(s): 140 [details] Available for editors [request]
additional sourceWenz, 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 athttp://biodiversitylibrary.org/bibliography/61839#/summary page(s): 367 [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Fossil range Exact age uncertain. Claimed to be from the "John Day group" (today John Day Formation), which roughly ranges in age from the Bartonian (late Eocene) to the Burdigalian (early Miocene). [details] Type locality "The North Fork of John Day River, Oregon, at the angle of the big bend, longitude 119° 40', latitude 44° 50" (referring to White 1885, p. 174) [details]
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