| site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
|---|---|---|---|---|---|---|---|---|---|
| A | Charlottesville, Virginia, USA | 1607 | prior to 1931 | type locality | freshwater | Kepner WA, Carter JS (1931): 118 | |||
| B | Heebukten, Bohuslän, Sweden | 7762 | 2003-2005 | type locality | Rock pool, Sphagnum , Menyanthes | Larsson K, Willems W (2010): 7 | |||
| C | Vetteberget, Fjällbacka, Bohuslän, Sweden | 7763 | 2003-2005 | Rock pool, Sphagnum | Larsson K, Willems W (2010): 7 |