[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 Gigartinales F.Schmitz
           Family Hypneaceae J.Agardh (1851)
             1 Genus Hypnea J.V.F. Lamouroux (1813)
             2 Genus Hypneocolax F. Børgesen (1920)