사회당
The Socialist Party split in February 1978, with its then leader, Marcelo Quiroga Santa Cruz, departing to form the Socialist Party-One. The original Socialist Party (right-wing section) chose Guillermo Aponte Burela as its leader. In March 1979, Sabino Tito Atahuichi split from the Socialist Party-Aponte and founded the Socialist Party-Atahuichi.