Technically, Bruno's predecessor was Antonio Pollina, who was named by Joseph Ida as the new boss (in 1959). For a short time Pollina, as the boss, plotted against underling Bruno, causing Bruno to visit with Carlo Gambino. Gambino, friendly with Bruno, showed his muscle and named Bruno as the Philly boss. Pollina realized what the situation was and acquiesced. (I said it was a tricky answer).

Turnbull's question still stands.