| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | Sagami Bay, Misaki, Japan | 1797 | prior to 1903 | type locality | Among Corallina weed in tidal pools and shallow water, Sagami Bay, Misaki, Japan. | Bock S (1922): ; from Prudhoe S (citation)- page 127 | |||
| B | Kanayama (Yuzaki, Yunosaki), Japan | 4453 | Apr 1937 | under stones between the tidemarks. | Kato K (1938): 577, 588 | ||||
| C | Biological Station Misaki, Japan | 1148 | 1944 or earlier | Kato K (1944): 306 | |||||
| D | Seto Inland Sea, Japan | 4472 | 1944 or earlier | Kato K (1944): 306 |