| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | Awa (Awa-dantai), Japan | 1780 | prior to 1918 | type locality | low water mark | Yeri M, Kaburaki T (1918): ; from Prudhoe S (citation)- page 107 | |||
| B | Mitsui Institute of Marine Biology, Susaki near Simoda, Siduoka Prefecture, Japan | 4428 | Jul 10, 1934 | single specimen at Susaki near the low tide-mark. | Kato K (1937): 220 | ||||
| C | Shirahama-ko (Sirahama Ko), Province of Awa (southern part of Chiba Prefecture), Japan | 4427 | 1944 or earlier | Kato K (1944): 287 | |||||
| D | Sunosaki (Susaki), Japan | 4494 | 1944 or earlier | Kato K (1944): 287 |