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Clicking on a marker will show information available about the collection site. (Compare with corresponding letter in table.)
| Scroll through list of sites as necessary. | site | collection date | depth | substrate | salin | locality kind | comments | reference |
|---|---|---|---|---|---|---|---|---|
| A | Tsugaru-hanto (Tsugaru Peninsula), Japan | 1958 or earlier | freshwater | default type | Hokkaidô and North Honshû (Tsugaru Peninsula and Kuroshi). | Ichikawa A, Okugawa KI (1958) from Kawakatsu 1969 (citation)- p. 86 | ||
| B | Kuroishi, Aomori, Japan | 1958 or earlier | freshwater | default type | Hokkaidô and North Honshû (Tsugaru Peninsula and Kuroshi). | Ichikawa A, Okugawa KI (1958) from Kawakatsu 1969 (citation)- p. 86 | ||
| C | point to represent the western part of the Shimokita Peninsula, Aomori Prefecture, Japan | 1970 or earlier | freshwater | small populations were found in the Shimokita Peninsula. | Kawakatsu M, Teshirogi W, Tsushima K (1970) 115-116 | |||
| D | 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. | Kawakatsu M, Shimamura M (1974) 87 from abstract | ||||