|  | site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | 
| A | Puget Sound, Washington, USA | 1657 
  map | Aug 5, 1953 |  | shallow | sand |  | one specimen among other polyclads collected by Mrs. D.W. Orihel at Friday Harbor and Woodah Island in Puget Sound.  Found on a dredged tunicat.  Sexually mature, laid eggs in lab,. | Hyman LH (1959): 12 | 
| B | San Juan Island, San Juan County, Washington, United States | 3780 
  map | 1933 or earlier | default type |  |  |  |  | Freeman D (1933): abstract | 
| C | Charleston Marina, Oregon | 7750 
  map | 2014-2015 |  |  |  |  |  | Kincaid ES, de Rivera CE (2021): abstract |