fossil marine animal genera Linnaeus, 1758 - animals
   Phylum Porifera Grant, 1836 - sponges
     †"archaeocyathids"
       1 Class †Regulares Vologdin, 1937 see Class Archaeocyatha Bornemann, 1884
       2 Class †Irregulares Vologdin, 1937 see Class Archaeocyatha Bornemann, 1884
       3 Class †uncertain