site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
---|---|---|---|---|---|---|---|---|---|
A | Hokkaido Island (Yesso, Ezo, Yezo, Yeso), Japan | 4573 map | 1962 or earlier | default type | freshwater | Ichikawa A, Kawakatsu M (1963): | |||
B | Hokkaido Island (Yesso, Ezo, Yezo, Yeso), Japan | 4573 map | 1969 or earlier | default type | freshwater | Middle, East and North Hokkaidô | Kawakatsu M (1969): 74 | ||
C | Hidaka, Japan | 4242 map | 1967-1970 | south-western slope of the Hidaka Mountain Range. The main river systems are the Mukawa, the Saru, the Monbetsu, and the Nikappu. Survey from spring to autumn. Common below altitudes of 900 m | Kawakatsu M, Shimamura M (1974): 87 from abstract |