| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | Crow Neck, Cobscook Bay, Maine, USA | 1270  map | May 1999 | type locality | subtidal | medium grained sediment | at reversing falls | Hooge MD, Tyler S (2003): 20 | |
| B | Reid State Park, Maine USA | 320  map | May 1999 | Hooge MD, Tyler S (2003): 20 | |||||
| C | Provincetown Harbor, Cape Cod Bay, Near Provincetown, Massachusetts, USA | 2867  map | May 3, 2005 | intertidal, LWL | med/coarse sand | many small snails present on surface of sand | : Hooge (unpublished) |