Cercozoa Cavalier-Smith, 1998
   Filosa T. Cavalier-Smith & E.E.-Y. Chao, 2003
     Order Tremulida Cavalier-Smith & Howe, 2011
       Genus Tremula A.T. Howe et al., 2011
         1 Tremula longifila A.T. Howe et al., 2011