map| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | near eastern Tonne Helgoland II, Skitt-Gatt (Skittgatt channel), Helgoland Island, Germany | 752map | May 1963 | type locality | 8 m | coarse gravel | museum specimen number: SMF 3439-45 | Dorjes J (1968): 430; also biogeography and ecology on this and other German Bay species in (citation)- 78-115. |