map| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | north flat (Nordwatt), Helgoland Island, Germany | 714map | Jul 1964 | type locality | fine shell | museum specimen number: SMF 3293-94 | Dorjes J (1968): 328; also biogeography and ecology on this and other German Bay species in (citation)- 78-115. |