347 genera are assigned to the class HEXACTINELLIDA

OrderGenusFOPFOSLOPLOS
AMPHIDISCOSAHyalonemiaTEoR 
AMPHIDISCOSAItararellaCBashCStep
AMPHIDISCOSAKalimnospongiaOCaraOCara
AMPHIDISCOSALiscombispongiaOCaraOCara
AMPHIDISCOSAPattersoniaOLlviOAshg-l
AMPHIDISCOSAPelicaspongiaSLudlDFras
AMPHIDISCOSAPheronemaTEoR 
AMPHIDISCOSASemperellaKCampR 
AMPHIDISCOSAStiodermaCVisePGuad-u
AMPHIDISCOSATwenhofelellaSWenl-uDGedi-l
AMPHIDISCOSAWalliospongiaOCaraOCara
AMPHIDISCOSAWareembraOCaraOCara
HEMIDISCOSAHemidiscellaKCamp-lKCamp-l
HEMIDISCOSAMicrohemidisciaCBashCBash
HEXACTINOSAAndreaeaKCenoKCeno
HEXACTINOSAAphrocallistesKAlbiR 
HEXACTINOSAAulacosiaKuKu
HEXACTINOSAAulodomusJOxfo-lJOxfo-l
HEXACTINOSABelonisiaKuKu
HEXACTINOSABotrocloniumKCenoKu
HEXACTINOSABotryosellaKuKu
HEXACTINOSACaesariaTrAnis-mJKimm
HEXACTINOSACaseispongiaJuJu
HEXACTINOSACinclidermaKTuro-uKSn
HEXACTINOSACraticulariaJBajo-uTMi
HEXACTINOSACribrospongiaJBajoJBajo
HEXACTINOSACyrtoboliaKuKu
HEXACTINOSADiphyllospiraTThanTThan
HEXACTINOSAEcblastesiaKuKu
HEXACTINOSAEmplocaJBajo-uJBath-l
HEXACTINOSAErineumKuKu
HEXACTINOSAEtheridgiaKSantKSn
HEXACTINOSAEubrochisKAlbi-uKu
HEXACTINOSAEubrochusKAlbi-uKu
HEXACTINOSAEureteKAlbi-uR 
HEXACTINOSAEutactostomiumTThanTThan
HEXACTINOSAFarreaKAlbi-uR 
HEXACTINOSAFeifeliaJuJu
HEXACTINOSAGevreyaJuJu
HEXACTINOSAGuettardiscyphiaKCeno-lTEo
HEXACTINOSAHabrosiumKuKu
HEXACTINOSAHexactinellaKCenoR 
HEXACTINOSAHormathospongiaKSant-uKSant-u
HEXACTINOSAIntextumKuKu
HEXACTINOSAKoleostomaKCenoKCeno
HEXACTINOSALaocaetisJuTMi
HEXACTINOSALeptolacisJuJu
HEXACTINOSALeptophragmaJCall-lTThan
HEXACTINOSALinonemaJuJu
HEXACTINOSALonsdaKuKu
HEXACTINOSALopanellaKuKu
HEXACTINOSAMastodictyumJBajoJBajo
HEXACTINOSAMimeticosiaKuKu
HEXACTINOSAMultiloquaJuJu
HEXACTINOSAMyliusiaKuR 
HEXACTINOSAMysteriumJuJu
HEXACTINOSANitidusJuJu
HEXACTINOSAOctobrumJuJu
HEXACTINOSAOrdinatusJOxfo-lKu
HEXACTINOSAOxyrhiziumKuKu
HEXACTINOSAPachyascusJuJu
HEXACTINOSAPalaeostauronemaDFras-uDFras-u
HEXACTINOSAParacraticulariaJOxfo-uKMaes-u
HEXACTINOSAPeriphragellaJBajo-uR 
HEXACTINOSAPeriplectumKuKu
HEXACTINOSAPetalopeKuKu
HEXACTINOSAPileolitesPLeon-lPLeon-l
HEXACTINOSAPlacochlaeniaTMiTMi
HEXACTINOSAPlacotremaKTuro-uKSn
HEXACTINOSAPlecteuretteTThanTThan
HEXACTINOSAPlectospyrisJBajoJBajo
HEXACTINOSAPleurochoriumKuR 
HEXACTINOSAPleurostomaKSnTEo
HEXACTINOSAPolyosepiaKSantKSn
HEXACTINOSAPolyschemaJuJu
HEXACTINOSAPolystigmatiumKuKu
HEXACTINOSAPolysygeJuJu
HEXACTINOSAPolythyrisKuKu
HEXACTINOSAPoriferellaDFras-uDFras-u
HEXACTINOSAPorospongiaJuKAlbi-u
HEXACTINOSAProeureteKuKu
HEXACTINOSAProhexactinellaKuKu
HEXACTINOSAProtremadictyonDFras-uDFras-u
HEXACTINOSAPsephosyllogusJuJu
HEXACTINOSAPseudopemmatitesDFrasDFras
HEXACTINOSAPsilocalyxJOxfo-lJOxfo-l
HEXACTINOSAPtychodesiaKuKu
HEXACTINOSAPurisiphoniaKlKl
HEXACTINOSAPycnocalyptraJuJu
HEXACTINOSARamalmerinaTMi-u-lTMi-u-l
HEXACTINOSARamispongiaJBajo-uJBath-l
HEXACTINOSARhodanospongiaJmJm
HEXACTINOSARhogostomiumJOxfo-lJKimm-u
HEXACTINOSARhombedoniumJuJu
HEXACTINOSARhopalicnaJCall-uJOxfo-l
HEXACTINOSASaynospongiaJuJu
HEXACTINOSASclerothamnopsisTMi-u-lR 
HEXACTINOSASestrodictyonKAlbi-uKCeno-m
HEXACTINOSASphenaulaxJCall-lJOxfo-u
HEXACTINOSAStaurodermaJBajo-uJKimm-l
HEXACTINOSAStichmaptyxKuKu
HEXACTINOSAStrephiniaKAlbi-uKCeno-m
HEXACTINOSAStromatidiumPGuad-lPGuad-u
HEXACTINOSASynauliaKuKu
HEXACTINOSAThyroidiumJOxfo-lJKimm-l
HEXACTINOSATremadictyonTrAnis-mJTith
HEXACTINOSATremaphorusJOxfo-lKApti
HEXACTINOSATretodictyumKCenoR 
HEXACTINOSATyphlopleuraKuKMaes
HEXACTINOSAUbiquiradiusKuKu
HEXACTINOSAWapkiosaKuKu
HEXACTINOSAWollemanniaKSantKMaes
HEXACTINOSAZittelospongiaKSantKSant
LYCHNISCOSAAlosculumTrCarnTrCarn
LYCHNISCOSAAstropegmaKlKl
LYCHNISCOSAAulophaxKSantR 
LYCHNISCOSABalantionellaKCamp-lKCamp-l
LYCHNISCOSABeaussetiaKuKu
LYCHNISCOSABecksiaKAptiKMaes
LYCHNISCOSABolitesiaKuKu
LYCHNISCOSACalathiscusJBajoJBajo
LYCHNISCOSACallicylixKuKu
LYCHNISCOSACallodictyonKAlbiKCamp-u
LYCHNISCOSACalycospongiaTrCarnTrCarn
LYCHNISCOSACalyptrellaKCenoKCamp-u
LYCHNISCOSACameroptychiumKTuro-uKCamp-l
LYCHNISCOSACamerospongiaKValaKCamp-u
LYCHNISCOSACavispongiaJuJu
LYCHNISCOSACephalitesKTuro-uKMaes
LYCHNISCOSACeriodictyonJOxfo-uJOxfo-u
LYCHNISCOSACinclidellaKTuro-lKSn
LYCHNISCOSACoeloptychiumKAlbiKCamp-u
LYCHNISCOSACoeloscyphiaKAlbi-uKSn
LYCHNISCOSACoscinaulusJKimm-lJKimm-l
LYCHNISCOSACoscinoporaKTuro-lKMaes
LYCHNISCOSACyclostigmaKSantKCamp-u
LYCHNISCOSACypelliaJAaleJKimm-l
LYCHNISCOSACystispongiaKTuro-uKSn
LYCHNISCOSADactylocalyxT?R 
LYCHNISCOSADesmodermaK?K?
LYCHNISCOSADiplodictyonKSnKSn
LYCHNISCOSADiscophymaJOxfo-lJOxfo-u
LYCHNISCOSADracolychnusTrCarnTrCarn
LYCHNISCOSAElasmaKuKu
LYCHNISCOSAEtalloniellaJuJu
LYCHNISCOSAExanthesisKAptiKu
LYCHNISCOSAFlabellispongiaKCeno-uKCeno-u
LYCHNISCOSAGyrispongiaKuKu
LYCHNISCOSAHapalopegmaKCenoKCeno
LYCHNISCOSAJimaKuKu
LYCHNISCOSAKentrosiaKuKu
LYCHNISCOSALefroyellaKuR 
LYCHNISCOSALeiostracosiaKSantKMaes
LYCHNISCOSALepidospongiaKCamp-lKMaes
LYCHNISCOSALicmosinionKlKl
LYCHNISCOSALychniscaulusJCall-uJCall-u
LYCHNISCOSAMarshalliaKCamp-uKCamp-u
LYCHNISCOSAMeandrospongiaKuKu
LYCHNISCOSAMicroblastidiumKuKu
LYCHNISCOSAMonilispongiaTrCarnTrCarn
LYCHNISCOSAMoretiaKAptiKApti
LYCHNISCOSAMoretiellaKAptiKApti
LYCHNISCOSAMyrmecioptychiumKSnKSn
LYCHNISCOSANapaeanaKuKu
LYCHNISCOSANelumbifoliumTrCarnTrCarn
LYCHNISCOSAOncotoechusKCenoKTuro
LYCHNISCOSAOphrystomaKAlbi-uKCeno-m
LYCHNISCOSAOrnatusKuKu
LYCHNISCOSAOrthodiscusKTuroKMaes
LYCHNISCOSAPachyrachisJuJu
LYCHNISCOSAPachyteichismaJCall-uJOxfo-u
LYCHNISCOSAPhanerochidermaJCall-uJOxfo-u
LYCHNISCOSAPhlyctaeniumJOxfoJKimm-l
LYCHNISCOSAPlectascusKMaesKMaes
LYCHNISCOSAPlectodermatiumKuKu
LYCHNISCOSAPleuropeKCamp-uKCamp-u
LYCHNISCOSAPleuropygeKuKu
LYCHNISCOSAPlocoscyphiaJuKSn
LYCHNISCOSAPolyblastidiumKAlbi-uKCamp
LYCHNISCOSAPolygonatiumJOxfo-lJOxfo-l
LYCHNISCOSAPorochoniaKTuro-uKSn
LYCHNISCOSAPorocypelliaJuJu
LYCHNISCOSAPyrospongiaKuKu
LYCHNISCOSARadioplicaTrCarnTrCarn
LYCHNISCOSARhizochetonKuKu
LYCHNISCOSARhizopoteronopsisKuKu
LYCHNISCOSARhizopterionKTuroTThan
LYCHNISCOSASarophoraKAptiKCamp-u
LYCHNISCOSASclerokaliaKAlbi-uKAlbi-u
LYCHNISCOSAScleroplegmaKuR 
LYCHNISCOSAScolecosiaKuKu
LYCHNISCOSASestrocladiaKCeno-mKCeno-u
LYCHNISCOSASpirospongiaKMaes-uKMaes-u
LYCHNISCOSASporadopyleJOxfo-lKu
LYCHNISCOSASporadosciniaKAlbiKMaes
LYCHNISCOSAStamniaKTuro-uKTuro-u
LYCHNISCOSAStauronemaKAlbi-uKCeno-m
LYCHNISCOSAToulminiaJOxfo-lKSn
LYCHNISCOSATremabolitesKAptiKSn
LYCHNISCOSATriadocoeliaTrCarn-uTrCarn-u
LYCHNISCOSATrochobolusJOxfo-lJOxfo-u
LYCHNISCOSAVentriculitesKCenoKMaes-u
LYCHNISCOSAXylospongiaKuKu
LYCHNISCOSAZittelispongiaKuKu
LYSSACINOSIDAAcanthocorynaPLeon-uPLeon-u
LYSSACINOSIDAAcanthospongiaS?S?
LYSSACINOSIDAArakespongiaCBash-uCBash-u
LYSSACINOSIDAAsthenospongiaOAren-uOAren-u
LYSSACINOSIDABrachiospongiaOCara-mOAshg-m
LYSSACINOSIDACalathospongiaCTour-lCVise-l
LYSSACINOSIDACalcihexactinaCmBotoCmmMid
LYSSACINOSIDACaulophacusTEoR 
LYSSACINOSIDAColpospongiaOAshgOAshg
LYSSACINOSIDACorticulospongiaSLudl-lSLudl-l
LYSSACINOSIDACrateromorphaTEoR 
LYSSACINOSIDACypellospongiaTrOlen-uTrOlen-u
LYSSACINOSIDADivaricospongiaSLudl-uSLudl-u
LYSSACINOSIDAEndoplegmaPLeon-uPLeon-u
LYSSACINOSIDAEuplectellaTMiR 
LYSSACINOSIDAFistellaspongiaSLudl-uSLudl-u
LYSSACINOSIDAFoerstellaOCara-mOCara-m
LYSSACINOSIDAHydnoangulusCVise-lCVise-l
LYSSACINOSIDAKeriogastrospongiaTrCarnTrCarn
LYSSACINOSIDALasiothrixO?O?
LYSSACINOSIDAMalumispongiumSLdovSLdov
LYSSACINOSIDAMattaspongiaDFrasDFras
LYSSACINOSIDANorfordiaSWenl-lSWenl-l
LYSSACINOSIDAOncosellaSWenl-uSWenl-u
LYSSACINOSIDAOpeamorphusO?C?
LYSSACINOSIDAPalaeosaccusOTremOTrem
LYSSACINOSIDAPileospongiaCVise-uCSerp-l
LYSSACINOSIDAProeuplectellaKCenoKCeno
LYSSACINOSIDAPyritonemaS?S?
LYSSACINOSIDAPyruspongiaOAshg-lOAshg-l
LYSSACINOSIDARegardrellaKCenoR 
LYSSACINOSIDARosellaTEoR 
LYSSACINOSIDAStauractinellaJOxfo-lJKimm-l
LYSSACINOSIDATestispongiaCmuMid-mCmuMid-m
LYSSACINOSIDAToomeyospongiaPGuad-uPGuad-u
LYSSACINOSIDAValospongiaCmuMid-mCmuMid-m
LYSSACINOSIDAVaurealispongiaOAshg-lSWenl
LYSSACINOSIDAWongaspongiaOuOu
RETICULOSAAcanthactinellaClCl
RETICULOSAAcanthodictyaOmOm
RETICULOSAAcloeodictyaClCl
RETICULOSAActinodictyaDFras-uDFras-u
RETICULOSAAglithodictyaDFras-uDFras-u
RETICULOSAArmstrongiaDuDu
RETICULOSAArystidictyonDFras-uDFras-u
RETICULOSAAstroconiaS?S?
RETICULOSABotryodictyaDFras-uCPn
RETICULOSACarphitesPLeon-lPGuad-l
RETICULOSACeratodictyaDFras-uDFras-u
RETICULOSAClathrospongiaDGive-lCSerp-l
RETICULOSACleodictyaCTour-lCVise-l
RETICULOSAClepsydrospongiaDFras-lDFras-l
RETICULOSACorticospongiaDFameDFame
RETICULOSACryptodictyaDFras-uDFras-u
RETICULOSACyathodictyaOCara-mDu
RETICULOSACyathophycusOLlviSWenl-l
RETICULOSADiagoniellaCmmMid-lSLudl
RETICULOSADictyophytonSLudl-uDFras
RETICULOSADictyorhabdusOCara-lOCara-l
RETICULOSADictyospongiaSWenl-lCMosc-l
RETICULOSADierespongiaOCara-lOCara-l
RETICULOSADocodermaCMoscPGuad-u
RETICULOSAEctenodictyaClCl
RETICULOSAGabeliaSWenl-uDFame
RETICULOSAGongylospongiaDFrasDFras
RETICULOSAGriphodictyaCTourCVise-l
RETICULOSAHallodictyaDFras-uDFras-u
RETICULOSAHelicodictyaDFras-uDFras-u
RETICULOSAHexactractiellaSWenlSWenl
RETICULOSAHintzespongiaCmuMid-lCmuMid-m
RETICULOSAHolasterellaClCl
RETICULOSAHydnocerasDFras-mCTour-u
RETICULOSAHydnocerinaDuDu
RETICULOSAHydnodictyaOAshg-mOAshg-m
RETICULOSAHydriodictyaDFras-uCVise-l
RETICULOSAIowaspongiaDuDu
RETICULOSAIthacadictyaDFrasDFras
RETICULOSAKiwetinokiaCmlMid-lO?
RETICULOSALebedictyaDFrasCVise-l
RETICULOSALumectospongiaSLudl-lSLudl-l
RETICULOSALyrodictyaCTour-uCVise-l
RETICULOSAMastodictyaCVise-lCVise-l
RETICULOSAMegastyliaOTrem-lOTrem-l
RETICULOSAMicrostauraPLeon-uPLeon-u
RETICULOSAMultivasculatusCmFranCmTrep
RETICULOSAOzospongiaDuDu
RETICULOSAPalaeophragmodictyaVuVu
RETICULOSAPhormosellaO?S?
RETICULOSAPhragmodictyaCVise-lCSerp-l
RETICULOSAPhysospongiaCVise-lCVise-l
RETICULOSAPlectodermaSLudl-uSLudl-u
RETICULOSAPolylophidiumPLeon-uPLeon-u
RETICULOSAPolyplectellaOCara-uOCara-u
RETICULOSAPrismodictyaDFras-uCVise-l
RETICULOSAProtoarmstrongiaDFras-mDFras-m
RETICULOSAProtospongiaVN-Da-lSWenl-u
RETICULOSAPseudohydnocerasDGiveDGive
RETICULOSARatcliffespongiaCmuMid-mCmuMid-m
RETICULOSARhabdosispongiaDFras-uDFras-u
RETICULOSARhakistellaCBashCBash
RETICULOSARhombodictyonDuDu
RETICULOSARoemerispongiaDEifeDEife
RETICULOSASaetaspongiaCmAtda-uCmAtda-u
RETICULOSASphaerodictyaOCara-mOCara-m
RETICULOSASpiractinellaClCl
RETICULOSAStephanellaCmmMid-uO?
RETICULOSAStephenospongiaCmmMid-uCmmMid-u
RETICULOSAStereodictyumCBashPLeon-l
RETICULOSASycodictyaOCara-mOCara-m
RETICULOSATeganiumOCara-lOCara-u
RETICULOSAThamnodictyaCTour-lCTour-l
RETICULOSAThysanodictyaDFame-lDFame-m
RETICULOSATiddalickiaOAshg-mOAshg-m
RETICULOSATitusvilliaDFame-uDFame-u
RETICULOSATriticispongiaCmAtda-uCmAtda-u
RETICULOSAUphantenaDFras-uDFras-u
uncertainAcanothyraK?K?
uncertainAntrispongiaKlKl
uncertainAustralispongiaCmDres-uCmDres-u
uncertainAzyrtaliaCmAtda-uCmAtda-u
uncertainBaccispongiaJ?J?
uncertainBothroconisP?P?
uncertainChirospongiaOmOm
uncertainCrucispongiaJ?J?
uncertainDiplopleuraK?K?
uncertainEchidninaCmDres-lCmDres-l
uncertainEudictyonJHettJHett
uncertainFarreopsisKuKu
uncertainFlosculusCmDres-uCmDres-u
uncertainGonamispongiaCmTommCmTomm
uncertainHintzesnonaiaCmuMid-mCmuMid-m
uncertainHunanospongiaCmTomm-uCmTomm-u
uncertainIdiodictyonJlJl
uncertainKonyriumCmDres-lOLlde-u
uncertainLysactinellaDlDl
uncertainNephelispongiaDuDu
uncertainPachylepismaKuKu
uncertainPinnatispongiaCmDres-uCmDres-u
uncertainRigbyellaCmuCmu
uncertainSilicunculusCmDres-lOCara-u
uncertainStiodermiellaDGedi-lDGedi-l
uncertainTextispongiaJ?J?
uncertainUralonemaClCl

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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).