ladogensis, Lampetra fluviatilis morpha Ivanova-Berg [M. M.] 1966:565 [Voprosy Ikhtiologii v. 6 (no. 3, 40); ref. 22957] Original not seen. Infrasubspecific, not available; from Lake Ladoga, Russia. Not treatred by Renaud 2011:58 [ref. 31770]. •In the synonymy of Lampetra fluviatilis (Linnaeus 1758) -- (Hardisty 1986:250 [ref. 24820], Kottelat 1997:27 [ref. 22952], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:16 [ref. 23570]). Infrasubspecific. Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae.