2522 Occidentis ayresii (Günther, 1870) Petromyzontidae Northern lampreys Lampetrinae Petromyzontiformes Petromyzonti Western river lamprey Eastern Pacific: Tee Harbor, Alaska to Sacramento-San Joaquin drainage in California, USA. Freshwater resident population in Morrison Creek, Vancouver Island, British Columbia (Ref. 12269). UBC 580310 49 N 124 W Lampetra ayresi UBC 580310 49 N 124 W Lampetra ayresi UBC 580342 49 N 123 W Lampetra ayresi UBC 100025 49 N 124 W Lampetra ayresi UBC 590576 49 N 123 W Lampetra ayresii UBC 600202 48 N 123 W Lampetra ayresi UBC 600203 53 N 131 W Lampetra ayresi UBC 600324 49 N 122 W Lampetra ayresi UBC 610233 49 N 123 W Lampetra ayresi UBC 610235 54 N 130 W Lampetra ayresi UBC 610234 49 N 123 W Lampetra ayresi UBC 110422 Lampetra ayresii UBC 110099 Lampetra ayresii UBC 700013 49 N 123 W Lampetra ayresi UBC 760092 49 N 123 W Lampetra ayresi UBC 540094 49 N 123 W Lampetra ayresi UBC 650696 58 N 134 W Lampetra ayresi UBC 650376 58 N 133 W Lampetra ayresi UBC 650204 Lampetra ayresi UBC 650203 49 N 123 W Lampetra ayresi UBC 631319 58 N 134 W Lampetra ayresi UBC 630323 58 N 134 W Lampetra ayresi UBC 620946 57 N 136 W Lampetra ayresi UBC 610543 58 N 134 W Lampetra ayresi not stated 48 N 123 W 1942 Lampetra ayresii MOVI 30959 1946 Lampetra ayresii MOVI 30960 1947 Lampetra ayresii MOVI 30961 1947 Lampetra ayresii ZMH 3964 1967 Lampetra ayresii AMNH 51338 1972 Lampetra ayresi