|  | site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | 
| A | Península de Río de Oro, Western Sahara | 7064 
  map |  |  |  |  |  |  | Palombi A (1939): | 
| B | Port-Étienne, Mauritania | 7062 
  map | Nov 9, 1935 | default type |  |  |  |  | Palombi A (1939): and from Prudhoe 1989 (citation) | 
| C | Gulf of Naples (Bay of Naples, Neapel, Napoli), Italy | 1142 
  map | 1884 or earlier |  |  |  |  |  | Lang A (1884): from Prudhoe 1989 (citation) | 
| D | Ría de Arousa, Iberian Peninsula, Spain | 7305 
  map | 2015 or earlier |  |  |  |  |  | Noreña C, Rodriquez J, Perez J, Almon B (2015): from abstract | 
| E | Rodiles beach, Villaviciosa (Asturias), Cantabrian coast (North Atlantic) of the Iberian Peninsula, Spain | 7343 
  map | Sep-Nov 2012 |  |  |  |  | Intertidal zone. | Marquina D, Fernández-Álvarez FA, Noreña C (2015): | 
| F | Las Represas beach, Tapia de Casariego (Asturias), Cantabrian coast (North Atlantic) of the Iberian Peninsula, Spain | 7344 
  map | Sep-Nov 2012 |  |  |  |  | Intertidal zone. | Marquina D, Fernández-Álvarez FA, Noreña C (2015): |