Typový druh
Petromyzon ayresii Günther, 1870.
Původní popis
Carim, K. J., Auringer, G., Docker, M. F., Renaud, C. B., Clemens, B. J., Blanchard, M. R., Parker, C. & Young, M. K. 2024. Species diversity in the new lamprey genus Occidentis, formerly classified as western North American 'Lampetra'. PLoS ONE v. 19 (no. 12): e0313911: 1-21.
Použitá literatura
Fricke, R., Eschmeyer, W. N. & Van der Laan, R. (eds). 2025. Eschmeyer's catalog of fishes: Genera, species, references. World Wide Web.