original description
Suzuki K. (1941). Three new species of non-marine shells from the Tertiary formations of HokkaidÅ and Karahuto. <em>Japanese Journal of Geology and Geography.</em> 18(1-2): 53-58.
page(s): 56-57, pl. 4, fig. 6a, b [details] Available for editors [request]
From editor or global species database
Type locality "in the Migigono-sawa, a branch of the Takara-zawa, Nayosi-mura, Nayosigun, Karahuto (Nayosi coal-field)" [Note that Karahuto/Karafuto Prefecture = Sakhalin (today belongs to Russia)] [details]