| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | Boiler Bay, South of Lincoln City, Oregon | 3712 | Apr 1969 | type locality | coarse sand | tidal zone. | Karling TG (1989): 19 | ||
| B | Dillon Beach, Bodega Bay, California, USA | 4879 | Aug 1960 | shell gravel | tidal zone. | Karling TG (1989): 19 | |||
| C | Boiler Bay, South of Lincoln City, Oregon | 3712 | December 13, 2020 | Collected by Matthew Hooge | : |