Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
154511
| RI | Washington | Atlantic Ocean, Narragansett (near pier) [Location approximate, hand plotted] | 1996 |
32004100
| Virginian | established |
260280
| RI | Washington | Atlantic Ocean, Weekapaug point in Block Island Sound | 2004 |
32004100
| Virginian | established |
155584
| RI | Washington | Block Island Sound, Weekapaug [Location approximate, hand plotted] | 1998 |
32004100
| Virginian | established |