Name Abbr. Leader(s) Ideology Reg. Elections Note
Humanist Party
Partido Humanista
PH Valdomiro dos Santos Filho Universal humanism
Socialism
1985 1985, 1986, 1988
National Humanist Party
Partido Humanista Nacional
PHN Luiz Paulino 1988 1988
Communist Party
Partido Comunista
PC Horácio Macedo Communism 1992 1992