Kingdom Animalia Linnaeus, 1758 - animals
   Phylum †Archaeocyatha Vologdin, 1937 see Class Archaeocyatha Bornemann, 1884
     Genus †Ajacicyathus Bedford & Bedford, 1939
     Genus †Annulocyathus Vologdin, 1937
     Genus †Archaeolynthus Taylor, 1910
     Genus †Bicyathus Vologdin, 1939, nom. nud.
     Genus †Botomocyathus Zhuravleva, 1955
     Genus †Cryptoporocyathus Zhuravleva, 1960
     Genus †Erismacoscinus Debrenne, 1958
     Genus †Kijacyathus Zhuravleva, 1959
     Genus †Kotuyicyathus Zhuravleva, 1960
     Genus †Okulitchicyathus Zhuravleva, 1960
     Genus †Orbicyathus Vologdin, 1937
     Genus †Paranacyathus Bedford & Bedford, 1937
     1 Class †Regulares Vologdin, 1937 see Class Archaeocyatha Bornemann, 1884
     2 Class †Irregulares Vologdin, 1937 see Class Archaeocyatha Bornemann, 1884