ernstii, Petromyzon Dybowski [B. N.] 1872:220 [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 22; ref. 1170] Amur River mouth, Siberia, Russia. No types known. •Synonym of Lampetra japonica (Martens 1868) -- (Berg 1948:35 [ref. 12882]). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159], Holčík 1986:199 [ref. 24819], Reshetnikov 1998:17 [ref. 23570]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Dyldin & Orlov 2016:543 [ref. 34656], Naseka & Renaud 2020:27 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.