kessleri, Petromyzon Anikin [V. P.] 1905:10 [Izvestiya Tomskogo Universiteta v. 27; ref. 15920] Tom River and mouth of Kirgizka River near Tomsk, Ob River system, western Siberia, Russia. Syntypes: (16) Tomsk State University 3698 (1), 3702 (1). •Synonym of Lampetra japonica (Martens 1868), but a valid subspecies -- (Berg 1948:40 [ref. 12882], Scott & Crossman 1998:59 [ref. 24570]). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159]). •Valid as Lampetra kessleri (Anikin 1905) -- (Sato in Masuda et al. 1984:2 [ref. 6441], Kawanabe & Mizuno 1989:36 [ref. 25598]). •See Kottelat 2006:14 [ref. 28831]. •Synonym of Lethenteron reissneri (Dybowski 1869) -- (Kottelat 2006:13 [ref. 28831] with question, Parin et al. 2014:15 [ref. 33547]). •Valid as Lethenteron kessleri (Anikin 1905) -- (Holčík 1986:220 [ref. 24819], Yamazaki & Goto 1996:283 [ref. 22431], Chereshnev 1996:598 [ref. 24659], Yamazaki & Iwata 1997:51 [ref. 24065], Nikiforov et al. 1997:330 [ref. 24694], Reshetnikov et al. 1997:725 [ref. 24702], Reshetnikov 1998:18 [ref. 23570], Yamazaki & Goto 2000:8 [ref. 24514], Nakabo 2000:111 [ref. 25086], Matsuura et al. 2000:14 [ref. 26000], Chereshnev et al. 2001:30 [ref. 26736], Pietsch et al. 2001:138 [ref. 25688], Bogutskaya et al. 2001:42 [ref. 26178], Nakabo 2002:111 [ref. 26001], Sotnikov & Solov'ef 2002:838 [ref. 26576], Yamazaki et al. 2003:592 [ref. 27883] with author as Anckin, Bogutskaya & Naseka 2004:20 [ref. 28183], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:48 [ref. 31599], Renaud 2011:72 [ref. 31770], Mateus et al. 2013:46 [ref. 32714], Romanov et al. 2017:820 [ref. 35687], Dolgov et al. 2018:24 [ref. 41055], Naseka & Renaud 2020:51 [ref. 37921], Dyldin et al. 2022:[5] [ref. 39193]). Current status: Valid as Lethenteron kessleri (Anikin 1905). Petromyzontidae. Distribution: Eurasia: Siberia (Russia) and eastern Europe; Japan. Habitat: freshwater, brackish, marine.