11 genera are assigned to the phylum CHAETOGNATHA

OrderGenusFOPFOSLOPLOS
protoconodontidaAmphigeisinaCmAtda-uCmmMid
protoconodontidaGanloudinaCmTommCmTomm
protoconodontidaGapparodusCmAtda-lCmDres
protoconodontidaKijacusCmTomm-lCmAtda-u
protoconodontidaLeguminellaCmTomm-uCmTomm-u
protoconodontidaMaldeotaiaCmTomm-lCmTomm-l
protoconodontidaMongolodusCmBoto-lCmBoto-l
protoconodontidaProtohertzinaVN-Da-lCmBoto-l
uncertainIncertae sedisCmmMid-lCmmMid-l
uncertainPaucijaculumCMosc-uCMosc-u
uncertainTiterinaOAren-lOAren-l

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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).