"Heterococcoliths"
   "Placoliths"
     Order †Podorhabdales Rood et al. (1971)
       1 Family †Axopodorhabdaceae (Bown & Young, 1997)
       2 Family †Biscutaceae Black (1971)
       3 Family †Calyculaceae Noel (1973)
       4 Family †Prediscosphaeraceae Rood, Hay & Barnard (1971)
       5 ?Family †Cretarhabdaceae Thierstein (1973)
       6 ?Family †Mazaganellaceae Bown (1987)
       7 ?Family †Tubodiscaceae (Bown & Rufledge, 1997)