"chrysophytes" see [unranked] core chrysophytes
   Class "Bicosoecophyceae" Loeblich III & Loeblich (1979), nom. nud. see Order Bicosoecida Grassé, 1926
     ?Order Pirsoniales Caval.-Sm. (1998)
       1 Genus Pirsonia Schnepf et al. (1990)