|  | site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | 
| A | Weser River Estuary, Lower Saxony, Germany | 3656 
  map | 1993-1994 |  |  | sand |  | Weser Estuary (Germany, Lower Saxony) samples taken from intertidal flats.  Detritusarme Sande im Meso- und Polyhalinicum. | Krumwiede A, Witt J (1995): 321 | 
| B | Bremerhaven, Weser River Estuary, Lower Saxony, Germany | 3661 
  map | 1993-1994 |  |  |  |  | Bremerhaven (Strandbad), Weser Estuary samples taken from intertidal flats. | Krumwiede A, Witt J (1995): 322 | 
| C | Weddewarden, Weser River Estuary, Lower Saxony, Germany | 3662 
  map | 1993-1994 |  |  |  |  | Weddewarden, Weser Estuary samples taken from intertidal flats. | Krumwiede A, Witt J (1995): 322 | 
| D | Weddewarden, Weser River Estuary, Lower Saxony, Germany | 3663 
  map | 1993-1994 |  |  |  |  | Burhave (Nordbereich des Strandbades Burhave), Weser Estuary samples taken from intertidal flats. | Krumwiede A, Witt J (1995): 322 | 
| E | Sahlenburg Watt, Weser River Estuary, Lower Saxony, Germany | 3665 
  map | 1993-1994 |  |  |  |  | Sahlenburg (Hundestrand), Weser Estuary samples taken from intertidal flats. | Krumwiede A, Witt J (1995): 322 | 
| F | Estuary of Slack, Ambleteuse, Pas de Calais, France | 4174 
  map | May 1979 | type locality |  | fine sand with mud | brackish | found in rather fine sand with silt and detritus, always in a more or less protected area, generally in brackish water.  Collector E. Martens. | Martens PM, Curini-Galletti MC, Puccinelli I (1989): 238, 252 | 
| G | Estuary of Slack, Ambleteuse, Pas de Calais, France | 4174 
  map | May 1984 | type locality |  | fine sand with mud | brackish | Found in rather fine sand with silt and detritus, always in a more or less protected area, generally in brackish water. | Martens PM, Curini-Galletti MC, Puccinelli I (1989): 238, 252 | 
| H | Het Zwin (Zwin Estuary, Zwijn), Belgium | 4176 
  map | May 1983 |  |  |  |  | Zwin (lagoon) | Martens PM, Curini-Galletti MC, Puccinelli I (1989): 238 | 
| I | Het Zwin (Zwin Estuary, Zwijn), Belgium | 4176 
  map | Sep 1983 - Apr 1984 |  |  |  |  | Zwin (lagoon).  Collector Revis. | Martens PM, Curini-Galletti MC, Puccinelli I (1989): 238 | 
| J | Texel (Tessel), Netherlands | 4177 
  map | Jun 1982 |  |  |  |  |  | Martens PM, Curini-Galletti MC, Puccinelli I (1989): 238 | 
| K | Passamaquoddy Bay (Passamada Quoda), Saint Andrews, New Brunswick, Canada | 3630 
  map | Aug 1984 |  |  |  |  |  | Martens PM, Curini-Galletti MC, Puccinelli I (1989): 238 | 
| L | Belgium coast | 5471 
  map | 1989 or earlier |  |  |  | brackish | Die Art dringt in Brackgewässer vor:  Belgien. | Schockaert ER, Jouk PEH, Martens PM (1989): ; from Ax 2008 (citation)- p. 219 |