|  | site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | 
| A | Velika Vrata (Velicka Vrata), Croatia | 2872 
  map | 1956 or earlier |  | 20 - 40 m | mud and clay |  |  | Riedl R (1956): 109-110 | 
| B | Grötö (Groto, Groto - Goteborgs och Bohus Lan), Gullmarfjord, Sweden | 2869 
  map | 1956 or earlier |  | 150 m | mud and clay |  |  | Riedl R (1956): 109-110 | 
| C | Gullmarfjord (Bredungen Gullmarsvik), western Sweden | 35 
  map | Aug 7, 1945 | default type | 40 m | clay |  | Zoologischen Station Kristineberg, Gullmaren: St. Bornö-Bredungen, Stat. 4, cca 40 m tief, Tonboden | Luther A (1948): 56 | 
| D | Gullmarfjord (Bredungen Gullmarsvik), by Blabergsholmen (Blåbergsholmen), western Sweden | 53 
  map | Aug 4, 1946 |  | 20-30 m | clay |  | Zoologischen Station Kristineberg, Gullmaren:  Blåbergsholmen, cca 20-30 tief, Tonboden. | Luther A (1948): 56 |