Phaeophyceae

class of algae Phaeophyceae (Phaeophyceae) is a class of organisms united by key anatomical and physiological traits. It contains 11 orders with 160 known species. Key order groups include Cutleriales, Desmarestiales, Dictyotales, Ectocarpales, Fucales, and kelp. Among its members, 6 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Ochrophyta (Ochrophyta).