Vistula barbel
Introduction The '''Vistula barbel''' ('''''Barbus waleckii''''') is a disputed species of European freshwater fish in the cyprinid genus ''Barbus''.It is often included in ''B. cyclolepis''. More recently, it has been hypothesized to be a natural hybrid that originated from a common barbel (''B. barbus'') female mating with a Carpathian barbel (''B. carpathicus'') male. Nevertheless, the populations do not seem to represent first-generation hybrids. It is recorded or suspected from Poland, Slovakia and Ukraine.
Footnotes * *  ''Barbus waleckii'' IUCN Red List v. 3.1, 2008