"Heterococcoliths"
   "Placoliths"
     Order †Arkhangelskiales (Bown & Hampton, 1997)
       Family †Kamptneriaceae (Bown & Hampton, 1997)
         ?Genus †Crucicribrum Black (1973)
         Genus †Gartnerago Bukry (1969)
         Genus †Kamptnerius Deflandre (1959)