Ref. No. | Title | 43938 | A new nonparasitic species of the Holarctic lamprey genus Lethenteron Creaser and Hubbs, 1922, (Petromyzonidae) from northwestern North America with notes on other species of the same genus. | 45639 | A new nonparasitic species of Lethenteron Creaser and Hubbs 1922 (Petromyzonidae) from Hokkaido, Japan. |
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