Overlapping markers can be separated by clicking on them.
Hovering the cursor over a marker will show the site's name.
Clicking on a marker will show information available about the collection site. (Compare with corresponding letter in table.)
| site | collection date | depth | substrate | salin | locality kind | comments | reference | |
|---|---|---|---|---|---|---|---|---|
| A | north flat (Nordwatt), Helgoland Island, Germany | Jul 1964 | fine shell | type locality | 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. |