wagneri, Petromyzon Kessler [K. F.] 1870:207, Pl. 3 (figs. 4-5) [Trudy St.-Peterburgskogo Obscestva Estestvoispytatelej = Travaux de la Société des Naturalistes de St. Pétersbourg. v. 1 (no. 2); ref. 18395] Volga River between Tver [Tvertsa] and Astrakhan, Russia, 46°21'N, 48°03'E. Syntypes: (10) NMW 61053 (1), SMNS 2398 (1), ZIN 2407 (2). Type catalog: Fricke 1995:17 [ref. 28100], Fricke 2005:54 [ref. 29864]. Also published as new in Kessler 1870:302 [67] [ref. 21480]. •Valid as Caspiomyzon wagneri (Kessler 1870) -- (Berg 1948:28 [ref. 12882], Holčík 1986:119 [ref. 24819], Lelek 1987:28 [ref. 22962], Coad 1995:6 [ref. 23608], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:15 [ref. 23570], Coad 1998:102 [ref. 23869], Yamazaki & Goto 2000:8 [ref. 24514], Bogutskaya et al. 2001:42 [ref. 26178], Bogutskaya & Naseka 2004:18 [ref. 28183], Fricke et al. 2007:10 [ref. 29533], Kottelat & Freyhof 2007:35 [ref. 29996], Ninua & Japoshvili 2008:163 [ref. 31251], Lang et al. 2009:52 [ref. 31599], Esmaeili et al. 2010:365 [ref. 33391], Renaud 2011:24 [ref. 31770], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Çiçek et al. 2015:142 [ref. 35151], Esmaeili et al. 2017:23 [ref. 35254], Esmaeili et al. 2018:6 [ref. 36089], Dyldin et al. 2020:78, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:6 [ref. 37983], Kaya et al. 2020:328 [ref. 37582], Kuljanishvili et al. 2020:[6] [ref. 37535], Pereira et al. 2021:[10] 1991 [ref. 40490], Dyldin et al. 2022:[4] [ref. 39193], Çiçek et al. 2023:327 [ref. 40625], Çiçek et al. 2024:24 [ref. 40789]). Current status: Valid as Caspiomyzon wagneri (Kessler 1870). Petromyzontidae. Distribution: Eurasia: Caspian Sea basin (Kazakhstan, Russia, Azerbaijan, Iran and Turkmenistan). Habitat: freshwater, brackish, marine.