They have cells with cellulose in their cell walls, and primary chloroplasts derived from endosymbiosis with cyanobacteria that contain chlorophylls a and b and lack phycobilins.
Teñen células con parede celular con celulosa, e cloroplastos primarios derivados da endosimbiose con cianobacterias, que conteñen clorofilas a e b e carecen de ficobilinas.