Euglenozoa classes

Euglenophyceae (ICNafp, proposed as a class) or Euglenea (ICZN, proposed as a class) is an unranked clade of single-celled algae belonging to the phylum Euglenozoa. They have chloroplasts originated from an event of secondary endosymbiosis with a green alga. They are distinguished from other algae by the presence of paramylon as a storage product and three membranes surrounding each chloroplast.

REDIRECT Diplonemidae

Symbiontida is a basal class of flagellate Euglenozoa. As euglenozoans may be basal eukaryotes, the Symbiontida may be key to studying the evolution of eukaryotes, including the incorporation of eukaryotic traits such as the incorporation of alphaproteobacterial mitochondrial endosymbionts.