[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 Ceramiales Oltmanns
           Family Ceramiaceae Dumort. (1822)
             01 Genus Acrothamnion J.Agardh (1892)
             02 Genus Aglaothamnion G. Feldman-Mazoyer (1941)
             03 Genus Anotrichium Naegeli (1862)
             04 Genus Antithamnion Naegeli (1847)
             05 Genus Antithamnionella Lyle (1922)
             06 Genus Balliella H.Itono & T. Tanaka (1973)
             07 Genus Bornetia Thuret (1855)
             08 Genus Callithamniella G. Feldmann (1938)
             09 Genus Callithamnion Lyngbye (1819)
             10 Genus Centroceras Kuetzing (1841)
             11 Genus Centrocerocolax Joly (1966)
             12 Genus Ceramium Roth (1797), nom. cons.
             13 Genus Compsothamnion Naegeli (1862)
             14 Genus Corallophila A. Weber-van Bosse, in M.C.W. Weber (1923)
             15 Genus Crouania J.Agardh (1842)
             16 Genus Diplothamnion Joly & Yamaguishi, in Joly et al. (1966)
             17 Genus Dohrniella Funk (1922)
             18 Genus Grallatoria M. Howe, in N.L. Britton & C. Millspaugh (1920)
             19 Genus Griffithsia C.Agardh, nom. cons.
             20 Genus Gulsonia W. Harvey (1855)
             21 Genus Gymnophycus Huisman & Kraft (1983)
             22 Genus Gymnothamnion J.Agardh (1892)
             23 Genus Halosia Cormaci & G.Furnari (1994)
             24 Genus Halurus Kuetzing (1843)
             25 Genus Lejolisia Bornet (1859)
             26 Genus Microcladia Grev. (1830)
             27 Genus Microgelidiopsis Ercegovic (1980)
             28 Genus Monosporus Solier, in Castagne (1845)
             29 Genus Neosiphonia M.-S. Kim & I.K. Lee (1999)
             30 Genus Pleonosporium C. Naegeli (1862), nom. cons.
             31 Genus Plumaria Schmitz (1896), nom. cons.
             32 Genus Polysiphonia Grev. (1823)
             33 Genus Pseudospora L. de Cienkowski, 1865
             34 Genus Pterothamnion Naegeli, in Naegeli & C. Cramer (1855)
             35 Genus Ptilocladiopsis Berthold (1882)
             36 Genus Ptilota C.Agardh (1817), nom. cons.
             37 Genus Ptilothamnion Thuret, in Le Jolis (1863)
             38 Genus Scagelia E. Wollaston (1972)
             39 Genus Scageliopsis E.M. Wollaston (1981)
             40 Genus Scagelothamnion A. Athanasiadis (1996)
             41 Genus Seirospora Harv. ex F.J. Ruprecht (1851)
             42 Genus Spermothamnion J.E. Areschoug (1847)
             43 Genus Sphondylothamnion Naegeli (1862)
             44 Genus Spyridia Harvey, in Hook. (1833)
             45 Genus Tiffaniella Doty & Meñez (1960)
             46 Genus Vickersia Karsakoff (1896)
             47 Genus Wrangelia C.Agardh (1828)