"Heterococcoliths"
   "Placoliths"
     Order †Podorhabdales Rood et al. (1971)
       Family †Biscutaceae Black (1971)
         Genus †Seribiscutum M.V. Filewicz, F.H. Wind & S.W. Wise, in S.W. Wise & F.H. Wind (1977)