Overlapping markers can be separated by clicking on them.
Hovering the cursor over a marker will show the site's name.
Clicking on a marker will show information available about the collection site. (Compare with corresponding letter in table.)
| site | collection date | depth | substrate | salin | locality kind | comments | reference | |
|---|---|---|---|---|---|---|---|---|
| A | Hokkaido Island (Yesso, Ezo, Yezo, Yeso), Japan | 1962 or earlier | freshwater | default type | Ichikawa A, Kawakatsu M (1963) | |||
| B | Hokkaido Island (Yesso, Ezo, Yezo, Yeso), Japan | 1969 or earlier | freshwater | default type | Middle, East and North Hokkaidô | Kawakatsu M (1969) 74 | ||
| C | Hidaka, Japan | 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 |