original description
Preston, H.B. (1916). Descriptions of new freshwater shells from Japan. The Annals and Magazine of Natural History, (8) 17 (98): 159-163, pl. 9. London. [1 February]., available online at https://www.biodiversitylibrary.org/page/15612325
page(s): 162, pl. 9, figs 5, 5a, b. [details]
basis of record
Starobogatov, Y. I. (1970). Fauna Molliuskov i Zoogeograficheskoe Raionirovanie Kontinental'nykh Vodoemov Zemnogo Shara [The Molluscan Fauna and Zoogeographical Zoning of the Continental Water Bodies of the World]. <em>Nauka. Leningrad.</em> 372 p., 12 tables. In Russian.
page(s): 101 [details]
From editor or global species database
Type locality Japan, Lake Biwa, "on a muddy bottom at depths greater than 40 metres" [details]
Validity Treated as valid by Starobogatov [in Sitnikova, 1983: 35] [details]