6 genera are assigned to the class CYCLOZOA

OrderGenusFOPFOSLOPLOS
uncertainCyclomedusaVuVN-Da
uncertainHallidayaVuVu
uncertainMedusinitesVuVu
uncertainNimbiaVuCmu
uncertainPlanomedusitesVuVu
uncertainSåkwiaVuVu

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FOP = Period of first occurrence
FOS = Stage of first occurrence
LOP = Period of last occurrence
LOS = Stage of last occurrence

Stage abbreviations follow Sepkoski (2002).