[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
       Genus †Orbicoscinus Debrenne, 1977
       Genus †Orienticyathus Belyaeva, 1969
       Genus †Pluralicoscinus Debrenne & Lotze, 1963
       Genus †Polycoscinus Bedford & Bedford, 1937
       Genus †Polystillicidocyathus Debrenne, 1959
       Genus †Porocoscinus Debrenne, 1964
       Genus †Retecoscinus Zhuravleva, 1960
       Genus †Retetumulus Debrenne, 1977
       Genus †Rozanovicoscinus Debrenne, 1970
       Genus †Rozanovicyathus Korshunov, 1969
       Genus †Rudanalus
       Genus †Salairocyathus Vologdin, 1940
       Genus †Schumnycyathus
       Genus †Sigmocoscinus Bedford & Bedford, 1936
       Genus †Silviacoscinus
       Genus †Somphocyathus Taylor, 1910
       Genus †Statanulocyathus Debrenne, 1975
       Genus †Stillicidocyathus Ting, 1937
       Genus †Tatijanaecyathus Korshunov, 1976
       Genus †Tegerocoscinus
       Genus †Tomocyathus Rozanov, 1960
       Genus †Tubicoscinus Debrenne, 1989
       Genus †Tumulocoscinus Zhuravleva, 1960
       Genus †Veronicacyathus Debrenne, 1973
       Genus †Xestecyathus Kruse, 1982
       Genus †Zonacoscinus Debrenne, 1971
       1 ?Genus †Palaeoconularia Chudinova, 1959