The Salafist Al-Nour Party emerged as the second largest in parliamentary elections last year, but the parliament was dissolved by court order.
Founder Emad Abdel-Ghafour formed his own party on Jan. 1. It's expected to align with the party of President Mohammed Morsi's Muslim Brotherhood in upcoming elections.
Al-Nour chose Younis Makhyoun as its new leader on Wednesday.
The split resulted from infighting over the influence of clerics who were among Al-Nour founders, as well as relations with the dominant Brotherhood.
Opposition to the Brotherhood runs deep among many Salafis. Al-Nour's leaders say the Brotherhood is too willing to compromise on Islamic issues. Salafis advocate rule by strict Islamic law.
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