mapmap| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | south (southern) harbor entrance, Helgoland Island, Germany | 715map | Jul 1964 | type locality | 8 m | mud | museum specimen number: SMF 3295-99 | Dorjes J (1968): 335; also biogeography and ecology on this and other German Bay species in (citation)- 78-115. | |
| B | Garten, Helgoland Island, Germany | 711map | Jul 1964 | 3 m | shell sand mix | Dorjes J (1968): 335; also biogeography and ecology on this and other German Bay species in (citation)- 78-115. |