Lethenteron

Lethenteron is a genus of lamprey in the family Petromyzontidae.

==Species== There are currently 9 recognized species in this genus: Lethenteron alaskense Vladykov & Kott, 1978 (Alaskan brook lamprey) Lethenteron appendix (DeKay, 1842) (American brook lamprey) Lethenteron camtschaticum (Tilesius, 1811) (Arctic lamprey) Lethenteron hattai Iwata, Sakai & Goto, 2024 (Southern Japanese brook lamprey) Lethenteron kessleri (Anikin, 1905) (Siberian brook lamprey) Lethenteron mitsukurii (Hatta, 1901) (Northern Japanese brook lamprey) Lethenteron ninae Naseka, Tuniyev & Renaud, 2009 (Western Transcaucasian lamprey) Lethenteron reissneri (Dybowski, 1869) (Far Eastern brook lamprey) Lethenteron satoi Sakai, Iwata & Watanabe, 2024 (Fan-tailed brook lamprey)