map| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | Gullmaren, Fiskebackskil (Fiskebäckskil), western Sweden | 23map | prior to 1948 | mud | Luther identified this one specimen as P. cochlear. | Luther A (1948): from Hartog 1966 (citation)- p. 145 |