WASHINGTON (AP) _ Eight Mafia figures from New York City convicted in the 1979 murders of crime chieftain Carmine Galante and two of his associates lost Supreme Court appeals today.

The court, without comment, let stand the federal racketeering convictions of family bosses Anthony Salerno, Anthony Corallo and Carmine Persico, high- ranking mobsters Salvatore Santoro, Christopher Furnari and Gennaro Langella, and mob members Anthony Indelicato and Ralph Scopo.

The racketeering convictions stemmed, in part, from the plotting of Galante's July 12, 1979 murder at a Brooklyn restaurant. Also gunned down were Leonard Coppola and Giuseppe Turano.

Federal prosecutors say there are five distinct Mafia groups in New York City - the Genovese, Gambino, Colombo, Lucchese and Bonanno ''families.''

Prosecutors say Corallo was boss of the Lucchese family, which Santoro served as ''underboss'' and Furnari as ''consigliere.'' Persico led the Colombo family and Langella served as his underboss.

Salerno was boss of the Genovese family; Persico boss of the Colombo family and Langella its underboss.

Scopo, a member of the Colombo family, was also president of the District Council of Cement and Concrete Workers, Laborers International Union.

Indelicato, a Bonanno family ''soldier'' promoted after the Galante killings, was the only defendant accused of participating in them.

Evidence at the eight men's 11-week jury trial indicated that the activities of Mafia families throughout the nation are coordinated by a ''commission'' which each family boss serves as a member.

Through the 1970s, the Bonanno family was not represented directly on the commission because of internal disputes. Galante was the Bonanno family boss, and prosecutors said the commission ordered his murder as a means of resolving the disputes.

Each of the defendants was convicted of conspiracy in violation of the federal Racketeer Influenced and Corrupt Organizations Act (RICO).

All the defendants except Indelicato received 100-year prison sentences. He was sentenced to 40 years but that term was reduced to 20 years on appeal.

Except for overturning part of Indelicato's conviction, the 2nd U.S. Circuit Court of Appeals upheld the RICO conspiracy convictions last Jan. 31.

In the appeals acted on today, lawyers for the Mafia figures argued, among other things, that prosecutors failed to prove a sufficient connection between the Galante murder and the commission.

The cases are Indelicato vs. U.S., 88-1881; Salerno vs. U.S., 88-2060; Persico vs. U.S., 88-2061; Scopo vs. U.S., 88-2071.