mariae, Lampetra Berg [L. S.] 1931:94, Pls. 1 (fig. 3), 4 (figs. 1-4) [Trudy Biologiceskoi Assodiamii Akademii Nauk S.S.S.R., Ezhegodnik, Zoologicheskogo Muzeya v. 32; ref. 16355] Kharkov River near Kharkov, Donets River basin, Ukraine. Syntypes: ZIN 23124 (36, now 18). Additional material: ZIN 6172 (5), 6173 (2, missing), 10762 (1), 15353 (2), 23156 (3), 23160 (1), 23408 (1), plus other collections. •Valid as Lampetra mariae Berg 1931 -- (Berg 1948:33 [ref. 12882]). •Valid as Eudontomyzon mariae (Berg 1931) -- (Holčík & Renaud 1986:165 [ref. 24822], Lelek 1987:32 [ref. 22962], Kottelat 1997:25 [ref. 22952], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:16 [ref. 23570], Holčik & Delić 2000:74 [ref. 40079], Yamazaki & Goto 2000:8 [ref. 24514], Levin 2001:849 [ref. 25938], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:8 [ref. 26753], Hanel 2003:44 [ref. 27894], Bogutskaya & Naseka 2004:19 [ref. 28183], Hanel & Lusk 2005:166 [ref. 28804], Levin & Holčík 2006:283 [ref. 40896], Fricke et al. 2007:10 [ref. 29533], Kottelat & Freyhof 2007:38 [ref. 29996], Ninua & Japoshvili 2008:163 [ref. 31251], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:48 [ref. 31599], Renaud & Economidis 2010:42 [ref. 30894], Renaud 2011:41 [ref. 31770], Parin et al. 2014:14 [ref. 33547], Hanel & Andreska 2016:14 [ref. 34755], Dyldin et al. 2020:102 [ref. 37569], Pereira et al. 2021:[10] 1991 [ref. 40490], Dyldin et al. 2022:[4] [ref. 39193], Çiçek et al. 2023:327 [ref. 40625], Nagy et al. 2023:356 [ref. 40348]). Current status: Valid as Eudontomyzon mariae (Berg 1931). Petromyzontidae. Distribution: Southeastern Europe: Danube, Don and southern Volga river basins, Black Sea and Caspian Sea watersheds. Habitat: freshwater, brackish, marine.