| Reference no. | McPhail, J.D. and R. Carveth, 1993 |
| Ecosystem | Juan de Fuca Strait |
| Status | native |
| Abundance | common (usually seen) |
| Lifestage | adults |
| Regional database | |
| Remarks | From CA-BC. Freshwater records from Vancouver and the Queen Charlotte Islands, the lower and middle Fraser, the Thompson, Stikine, Taku and Aslek Rivers, and rivers of the central coast. Common in coastal waters (Ref. 4925). First British Columbia specime |