After the war with the Morellos, the New York Camorra gangs were largely decimated due to prosecutions and deaths/murders. They suffered highly from co-operating witnesses like Dainello, Antonio Notaro and others. A very large majority of the mainland Italians who joined the Mafia in the late 1920s/early 1930s like Joe Valachi, Frank Costello, Joe Adonis, Rocco Pellegrino etc were not former Camorristas. There never was a merger of the two criminal organizations. At least not in New York.