According to the old mafia tradition, a leader of a mafia family was originally called rappresentante, capo or padre. Today the leader is simply called the boss.
The boss is the highest level of a mafia family.
Beneath the boss is the underboss, or sotto capo (according to the old tradition), the boss´s second in command.
This position is appointed by the boss and can be removed by him at will.
The third highest level of a mafia family is of the consigliere. According to the old tradition, this position is held by a selected member by all the members of the family.
And then there´s the crewleaders, today called captains or skippers. The captains supervises a number of men that are called soldiers. They are divided into seperate crews. This is the lowest rank in a mafia family.
The captains were originally called capodecina (head of ten), but the number of soldiers in a crew varies.
All captains are appointed by the boss. And depending on the size of the family, the number of captains could be everything from 12 to 24.
In New York, the two largest families (Gambino and Genovese) has close to, or more than, 20 capos, while the smaller families has probably 12 or 13.
According to Bill Bonanno, in the old days, a family´s administration was made up by its boss, its consigliere and a number of captains. Today, I believe, the administration of a family is made up by the boss, underboss and the consigliere.
However, the most common leadership structure today is actually a panel or a ruling committee consisting of a number of high ranking members who runs a family in consensus. Maybe becuse to make it harder for the authorities to recognize the leadership.
Does this sound confusing? If it does, me and other posters on this forum can surely help you out with additional questions.
Welcome aboard!