"Heterococcoliths"
   "Placoliths"
     Genus †Chiastella Lambert (1993)
     Genus †Haqius Roth (1978)
     Genus †Markalius Bramlette & E. Martini (1964)
     Genus †Prolatipatella Gartner (1968)
     Genus †Repagulum S. Forchheimer (1972)
     1 Order †Podorhabdales Rood et al. (1971)
     2 Order †Watznaueriales Bown (1987)
     3 Order †Arkhangelskiales (Bown & Hampton, 1997)