[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Algae L. (1753) see [unranked] Algae
     Phylum Rhodophycota
       Class Rhodophyceae Thuret (1855) - red algae see Phylum Rhodophyta Wettst. (1901)
         01 Order Acrochaetiales Feldmann
         02 Order Ahnfeltiales Maggs & Pueschel (1989)
         03 Order Bangiales Nägeli (1847)
         04 Order Bonnemaisoniales Feldmann & Feldm.-Maz. (1942)
         05 Order Ceramiales Oltmanns
         06 Order Compsopogonales Skuja (1939)
         07 Order Corallinales P.C.Silva & H.W.Johans. (1986)
         08 Order Cryptonemiales Schmitz (1892)
         09 Order Erythropeltidales Garbary, Hansen & Scagel (1980)
         10 Order Gelidiales Kylin
         11 Order Gigartinales F.Schmitz
         12 Order Goniotrichales Skuja
         13 Order Gracilariales Fredericq & Hommers.
         14 Order Hildenbrandiales Pueschel & K.M.Cole (1982)
         15 Order Nemaliales F.Schmitz (1892)
         16 Order Palmariales Guiry & D.E.G.Irvine
         17 Order Plocamiales G.W.Saunders & Kraft
         18 Order Porphyridiales Kylin ex Skuja (1939)
         19 Order Rhodochaetales Bessey (1907)
         20 Order Rhodymeniales F.Schmitz (1892)
         21 Order Sphaerococcales