"Heterococcoliths"
Count: -
   "Placoliths"
  Count: †3o10f63g
     Order †Podorhabdales Rood et al. (1971)
    Count: †7f42g
       ?Family †Tubodiscaceae (Bown & Rufledge, 1997)
      Count: †2g
         Genus †Tubodiscus H.R. Thierstein (1973)
        Count: -