[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   [metazoans] Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
     Phylum †Archaeocyatha Vologdin, 1937 see Class Archaeocyatha Bornemann, 1884
       Order †Monocyathida Okulitch, 1935
         01 Genus †Alphacyathus Bedford & Bedford, 1939
         02 Genus †Aptocyathella Konyushkov, 1964
         03 Genus †Aptocyathus Vologdin, 1937
         04 Genus †Archaeolynthus Taylor, 1910
         05 Genus †Batschikicyathus see Genus Batschykicyathus Zhuravlev, 1983
         06 Genus †Butakovicyathus Zhuravleva, 1980
         07 Genus †Capsolynthus Osadchaya, 1967
         08 Genus †Capsulocyathus Vologdin, 1964
         09 Genus †Chabakovicyathus Konyushkov, 1964
         10 Genus †Cordobicyathus Perejón, 1975
         11 Genus †Cryptoporocyathus Zhuravleva, 1960
         12 Genus †Debrennecyathus Vologdin, 1966
         13 Genus †Dokidocyathella Zhuravleva, 1962
         14 Genus †Dokidocyathus Taylor, 1910
         15 Genus †Favilynthus Debrenne, 1974
         16 Genus †Fransuasaecyathus Zhuravleva, 1960
         17 Genus †Galinaecyathus Konyushkov, 1964
         18 Genus †Gerbikanaecyathus
         19 Genus †Globosocyathus Okuneva, 1969
         20 Genus †Incurvocyathus Rozanov, 1966
         21 Genus †Kaltatocyathus Rozanov, 1964
         22 Genus †Kazakovicyathus
         23 Genus †Kidrjassocyathus Rozanov, 1960 see Genus Kidrjasocyathus Rozanov, 1960
         24 Genus †Kyarocyathus Kruse, 1982
         25 Genus †Melkanicyathus Belyaeva, 1969
         26.0 Genus †"Mirandocyanthus" nom. null. see Genus Mirandocyathus Belyaeva, 1974
         27 Genus †Papillocyathus Rozanov, 1964
         28 Genus †Phymatocyathus Vologdin, 1977
         29 Genus †Propriolynthus Okuneva, 1967
         30 Genus †Rhabdocyathella
         31 Genus †Sajanolynthus Vologdin & Kashina, 1972
         32 Genus †Sekwicyathus Handfield, 1971
         33 Genus †Soanicyathus Rozanov, 1964
         34 Genus †Subtilocyathus Vologdin, 1960
         35 Genus †Tubericyathus Vologdin, 1977
         36 Genus †Tumuliolynthus Zhuravleva, 1963
         37 Genus †Tumuloglobosus Okuneva & Repina, 1973
         38 Genus †Uralocyathella Zhuravleva, 1960
         39 Genus †Zhuravlevaecyathus Rozanov, 1964