Distribution and phylogenetic relationships of Stereophaedusa japonica found in Gifu City

Stereophaedusa japonica is distributed in three areas of Gifu City, Gifu Prefecture: Akisawa and Oku near the northwestern end of the city, Miwa near the northeastern end, and Mizuburodani near the center of the city. DNA analyses showed that individuals from Mizuburodani and Miwa were identical or nearly identical to each other, while these sequences were more distantly related to those from Akisawa and Oku, suggesting that Mizuburodani populations derived from Miwa populations by migration and settlement via rivers.