Traits name details
original description
Suzuki K. (1941). Three new species of non-marine shells from the Tertiary formations of Hokkaidō and Karahuto. <em>Japanese Journal of Geology and Geography.</em> 18(1-2): 53-58. page(s): 57-58, pl. 4, fig. 1a, b [details] Available for editors 
basis of record
Mizuno, A. (1964). Summary of the Paleogene molluscan faunas in North Japan. <em>Geological Survey of Japan, Reports.</em> 207: 1-28. [details] Available for editors 
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