[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)
         Order Gracilariales Fredericq & Hommers.
           Family Gracilariaceae Nägeli (1847)
             1 Genus Gracilaria Grev. (1830)
             2 Genus Gracilariopsis E.Y. Dawson (1949)