"Nannoliths"
   1 Family Braarudosphaeraceae Deflandre (1947)
   2 Family †Eoconusphaeraceae Kristan-Tellmann (1988)
   3 Family †Goniolithaceae Deflandre (1957)
   4 Family †Lapideacassaceae Bown & Young (1997)
   5 Family †Microrhabdulaceae Deflandre (1963)
   6 Family †Nannoconaceae Deflandre (1959)
   7 Family †Polycyclolithaceae Forchheimer (1972)
   8 Family †Schizosphaerellaceae Deflandre (1959)