What is "cycnus"

''The butterfly genus Cycnus is now synonymized with '' Panthiades.

In Greek mythology, multiple characters were known as Cycnus (Κύκνος) or Cygnus. The literal meaning of the name is "swan", and accordingly most of them ended up being transformed into swans.

The Cycnus was an express train operated by Ferrovie dello Stato, linking Milan with Ventimiglia, Italy. Cycnus literally means swan, but more likely the name refers to the mythological King of Liguria, the region the train served.