Plocamiales Rhodymeniales Acrosymphytales Atractophorales Catenellopsidales Sebdeniales According to molecular clock analysis, Florideophyceae diverged from...

was later removed from the Halymeniales and elevated to a new order, Sebdeniales Withall and Saunders (by Withall and Saunders, 2006) as suggested by...