Nombre                                                           Periodo

J. H. Wilson+                                                   1972-1980

F. W. Owen Smith +                                         1980-1986

Julio Vielman                                                   1986-1991

Michael Ascoli                                                  1991-1994

Johann Dieter Nottebohm                                  1994-1997

Gabriel Biguria O.                                             1997-2002

Carlos M. Paiz                                                  2002-2005

Eduardo Portocarrero   H.                                 2005-2009