| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | Sagami Bay, Misaki, Japan | 1797 | prior to 1958 | type locality | among Corallina weed in tidal pools and shallow water. | Bock S (1923): ; from Prudhoe S (citation)- page 129 | |||
| B | Biological Station Misaki, Japan | 1148 | 1944 or earlier | Kato K (1944): 306 |