4 genera are assigned to the class HOMOSTELEA

OrderGenusFOPFOSLOPLOS
CINCTADecacystisCmmMid-uCmmMid-u
CINCTAGyrocystisCmmMid-uCmmMid-u
CINCTATrochocystitesCmuMidCmuMid
CINCTATrochocystoidesCmuMidCmuMid

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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).