original description
Hanna, G. D. & Gaylord, E. G. (1924). Description of a new genus and species of freshwater gastropod mollusk (<em>Scalez petrolia</em>) from the Etchegoin Pliocene of California. <em>Proceedings of the California Academy of Sciences, fourth series.</em> 13(9): 147-149., available online at https://biodiversitylibrary.org/page/3137967
page(s): 147 [details]
basis of record
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 177 [details] Available for editors [request]
additional source
Hanna, G. D. (1926). Further notes on <em>Scalez petrolia</em>. <em>The Nautilus.</em> 40(1): 14-16., available online at https://biodiversitylibrary.org/page/8523147 [details]
additional source
Woodring, W. P. (1936). Pliocene viviparoid calcareous operculum from the Kettleman Hills (California). <em>Proceedings of the Geological Society of America.</em> 1935: 413. [details]
From editor or global species database
Classification Originally placed in "Bithyniinae" by Hanna & Gaylord (1924), which was also advocated by Starobogatov (1992) based on the calcified operculum. However, Woodring (1936) had associated the opercula with viviparid shells. [details]