| Reference no. | Scott, W.B. and E.J. Crossman, 1973 |
| Ecosystem | Juan de Fuca Strait |
| Status | native |
| Abundance | common (usually seen) |
| Lifestage | adults |
| Regional database | |
| Remarks | From CA-BC. Occurs in Stikine, Taku (Ref. 10882), Nass, Skeena, Dean, Thompson (Ref. 10882), Fraser and Peace River systems. Also recorded from rivers in Queen Charlotte and Vancouver Islands and below the barriers of the Columbia River drainage (Ref. 10 |