Phylum †Archaeocyatha Vologdin, 1937 see Class Archaeocyatha Bornemann, 1884 Class †Cribricyathea Vologdin, 1961 Order †Pterocyathida Jankauskas, 1965 Family †Vologdinophyllidae Radugin, 1964 Genus †Cloudina Germs, 1972