Distribution map of Blanfordia species in Japan.
Kameda Y. &amp; Kato M. (2011). "Terrestrial invasion of pomatiopsid gastropods in the heavy-snow region of the Japanese Archipelago". BMC Evolutionary Biology 11: 118. doi:10.1186/1471-2148-11-118. Figure 3A. Rotated 32.5° and altered.
Yuichi Kameda &amp; Makoto Kato