Ochrophyta

Ochrophyta is a group of mostly photosynthetic heterokonts. Their plastid is of red algal origin.
The classification of the group is still being worked out. Some authors (e.g., Cavalier-Smith) divide it into two subphyla, Phaeista (comprising Hypogyristea and Chrysista in some classifications, or Limnista and Marista in others) and Khakista (comprising "Bolidomonas" and diatoms). Others prefer not to use the subphyla, listing only lower taxa (e.g., Reviers, 2002, Guiry & Guiry, 2014).
Phylogeny.
Based on the following works of Ruggiero et al. 2015 & Silar 2016.