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Anser cygniformis (Fraas 1870) Lambrecht 1933] (Middle Miocene of Germany)
** +Cygnus csakvarensis Lambrecht 1933 [Cygnus csákvárensis Lambrecht 1931a nomen nudum; Cygnanser csakvarensis (Lambrecht 1933) Kretzoi 1957; Olor csakvarensis (Lambrecht 1933) Mlíkovský 1992b] (Late Miocene of Hungary)
** +Dwarf swan (Cygnus equitum) Bate 1916 sensu Livezey 1997 [Anser equitum (Bate 1916) Brodkorb 1964; Cygnus (Olor) equitum Bate 1916 sensu Northcote 1988a]

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