[1][3][4] The chloroplast of the Synchromophyceae are surrounded by two membranes and arranged in a way where they share the outer pair of membranes.

The entire chloroplast complex is surrounded by an additional two outer membranes.

[2] Synchromophyceae or Picophagea is a clade within the Ochrophyta that contains a few genera of amoeboid organisms such as the mixotrophic Synchromonas and the heterotrophic Chlamydomyxa, Leukarachnion and Picophagus.

[5] It is phylogenetically close to the classes Chrysophyceae and Eustigmatophyceae, within the SII clade.

[6] Bacillariophyceae Pelagophyceae Dictyochophyceae Raphidophyceae Xanthophyceae Phaeophyceae Olisthodiscophyceae Pinguiophyceae Synchromophyceae Chrysophyceae Eustigmatophyceae According to AlgaeBase, the class contains only two genera:[7] However, the latest revision recognizes an additional four genera: Chrysopodocystis, Guanochroma, Leukarachnion and Picophagus.