IRMNG

Between brackets is the number of accepted species

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Biota
Kingdom Animalia
Kingdom Archaea
Kingdom Bacteria
Kingdom Chromista
Kingdom Fungi
Kingdom Plantae
Phylum Acritarcha †
Order Acanthomorphitae †
Order Diacromorphitae †
Order Herkomorphitae †
Order Netromorphitae †
Order Polygonomorphitae †
Order Prismatomorphitae †
Order Pteromorphitae †
Order Sphaeromorphitae †
Family Leiofusidae Eisenack, 1938 † accepted as Acritarcha †
Family Leiosphaeridaceae Timofeev, 1956 †
Genus Abacum M.A. Fombella, 1978 † accepted as Virgatasporites A. Combaz, 1968 †
Genus Acanthodiacrodium B.V. Timofeev, 1958 †
Genus Acantholigotriletes Alyushinskii, Kirichenko & Timofeev, 1957 †
Genus Acantholigotriletum B.V. Timofeev, 1959 †
Genus Acanthomarginata S.N. Naumova ex N.I. Umnova in N.I. Umnova & E.K. Vanderflit in V.K. Golubzov, 1971 †
Genus Acanthomesotriletes †
Genus Acanthominuscula Naumova [date?] †
Genus Acanthopsophosphaera Naumova, 1964 †
Genus Acanthorytidodiacrodium B.V. Timofeev, 1959 †
Genus Acanthosphaera S.N. Naumova, 1968 †
Genus Acanthozonodiacrodium B.V. Timofeev, 1959 †
Genus Acriora E.R. Wicander, 1974 †
Genus Acrosphaeridium A. Uutela & R. Tynni, 1991 †
Genus Acrum M.A. Fombella Blanco, 1977 †
Genus Actinotodissus A.R. Loeblich Jr. & H. Tappan, 1978 †
Genus Actinotophasis A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Actipilion A.R. Loeblich Jr., 1970 †
Genus Adara M.A. Fombella Blanco, 1977 †
Genus Adarve M.A. Fombella Blanco, 1977 †
Genus Adorfia G. Burmann, 1970 †
Genus Adornofusa A.R. Loeblich Jr. & H. Tappan, 1978 †
Genus Aducta Z.K. Fajzulina in Z.A. Akulcheva et al., 1981 †
Genus Agidelia † accepted as Valeria Minod, 1918
Genus Akmanella T. Ivanova, 2009 †
Genus Akomachra G.K. Colbath, 1979 †
Genus Aldridgeisphaera Kozur, 1986 †
Genus Alicespaeridium Zang & Walter, 1992 † accepted as Alicesphaeridium W.-L. Zang in Zang & Walter, 1992 †
Genus Alicesphaeridium W.-L. Zang in Zang & Walter, 1992 †
Genus Alisum H. Górka, 1965 †
Genus Alliumella E.K. Vanderflit in N.I. Umnova & E.K. Vanderflit in V.K. Golubzov, 1971 †
Genus Alocomurus Playford in Playford & Dring, 1981 †
Genus Alveosphaera V.V. Kirjanov, 1978 †
Genus Amadeusphaeridium Zang & Walter, 1992 †
Genus Ammonidium T.R. Lister, 1970 †
Genus Amoeboidium B.V. Timofeev & T.N. Hermann in B.S. Sokolov, 1979 †
Genus Amphitheca Vavrdova & Svobodova, 2010 †
Genus Ampullula E. Righi, 1991 †
Genus Amsdenium G. Playford & R. Wicander, 2006 †
Genus Ancilicula G. Claus & B. Nagy, 1962 †
Genus Ancorosphaeridium Sergeev, Knoll & Vorob'eva, 2011 †
Genus Angiospora †
Genus Angularia S.R. Samoilovitch ex G. Norris & W.A.S. Sarjeant, 1965 †
Genus Angulisphaerina A.S. Lopuchin in M.I. Neustadt, 1966 †
Genus Anguloplanina V.A. Rudavskaja in T.F. Vozzhennikova & B.V. Timofeev, 1973 †
Genus Ankyrotrochos Vecoli, 1999 †
Genus Annularia B.V. Timofeev & T.N. Hermann in Sokolov, 1979 † accepted as Annulusia B.V. Timofeev & T.N. Hermann in Jankauskas, 1989 †
Genus Annulatopsophosphaera N.G. Pychova in A.Y. Rozanov et al., 1969 †
Genus Annulodiscus M. Hajós, 1966 †
Genus Annulum M.A. Fombella Blanco, 1978 †
Genus Annulusia B.V. Timofeev & T.N. Hermann in Jankauskas, 1989 †
Genus Anomaloplaisium H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Anshania S. Ouyang, 1979 †
Genus Anthatractus J. Deunff, 1954 †
Genus Antrodibrachium G.K. Colbath, 1990 †
Genus Antrosphaera He, 1984 †
Genus Antruejadina F.H. Cramer, M. del C.R. Diez, R.M. Rodriguez & M.A. Fombella, 1976 † accepted as Crassiangulina S. Jardiné, A. Combaz, L. Magloire, G. Peniguel & G. Vachey, 1972 †
Genus Apectosphaeridium R.E. Turner, 1991 †
Genus Apodastoides Y. Zhang, L. Yin, S. Xiao & A.H. Knoll, 1998 †
Genus Apollinarisphaera G. Claus & B. Nagy, 1962 †
Genus Apophoreta G. Claus & B. Nagy, 1962 †
Genus Appendisphaera M. Moczydlowska, G. Vidal & V.A. Rudavskaja, 1993 † accepted as Ericiasphaera G. Vidal, 1990 †
Genus Aprioschadon A.R. Loeblich Jr. & H. Tappan, 1976 †
Genus Aquadulcum R. Harland & W.A.S. Sarjeant, 1970 † accepted as Cobricosphaeridium R. Harland & W.A.S. Sarjeant, 1970 †
Genus Arabisphaera D.O. Hemer & P.W. Nygreen, 1967 †
Genus Aranidium T.V. Jankauskas, 1975 †
Genus Arbusculidium J. Deunff, 1968 †
Genus Archaealetes Naumova, 1950 †
Genus Archaeoalveolata [unknown] †
Genus Archaeoconcentrica S.N. Naumova, 1968 †
Genus Archaeodinium S. Ouyang, 1979 †
Genus Archaeodiscina S.N. Naumova, 1960 †
Genus Archaeofavosina S.N. Naumova, 1960 †
Genus Archaeohystrichosphaeridium B.V. Timofeev, 1959 ex Loeblich & Tappan, 1976 †
Genus Archaeomassulina S.N. Naumova, 1968 † accepted as Protoleiosphaeridium B.V. Timofeev ex B.V. Timofeev, 1960 †
Genus Archaeomonoporina Naumova [date?] †
Genus Archaeopertusina S.N. Naumova, 1960 †
Genus Archaeopsophosphaera S.N. Naumova, 1968 † accepted as Asperatopsophosphaera D.A. Schepeleva ex E.A. Assejeva in P.L. Shulga, 1976 †
Genus Archaeopylomina †
Genus Archaeosacculina Pykhova, 1967 †
Genus Archaeosacculina S.N. Naumova, 1968 † accepted as Palaeoharpastum R.A. Fensome, G.L. Williams, M.S. Barss, J.M. Freeman & J.M. Hill, 1990 †
Genus Archaeospirulina A.M. Stanevich in Stanevich et al., 2009 †
Genus Archaeotunisphaeridium K. Grey, 2005 †
Genus Arcosphaeridium A. Uutela & R. Tynni, 1991 †
Genus Aremoricanium J. Deunff, 1955 †
Genus Arkonia G. Burmann, 1970 †
Genus Arkonites J.A. Legault, 1973 †
Genus Armstrongisphaera Kozur, 1986 † accepted as Papinochium M. Ters & G. Deflandre, 1966 †
Genus Artemisiocysta P.N. von Benedek, 1972 †
Genus Aryballomorpha F. Martin & L.-M. Yin, 1988 †
Genus Ascidiomorpha Y. Yan, 1995 †
Genus Ascostomocystis W.S. Drugg & A.R. Loeblich Jr., 1967 †
Genus Asketopalla A.R. Loeblich Jr. & H. Tappan, 1969 †
Genus Asperatopsophosphaera D.A. Schepeleva ex E.A. Assejeva in P.L. Shulga, 1976 †
Genus Asseserium M. Nagovitsin & K.E. Moczydłowska, 2012 †
Genus Asteridium M. Moczydlowska, 1991 †
Genus Asteriscus Kowalski, 1983 †
Genus Asterocapsoides L.M. Yin & Z.P. Li, 1978 †
Genus Asteromorpha Xing in Xing, Ding, Luo, He & Wang, 1984 †
Genus Asyncosmium R.E. Turner, 1991 †
Genus Athabascaella Martin, 1984 †
Genus Attritasporites Combaz, 1967 †
Genus Aureosphaera F.H. Cramer, M. del C.R. Diez, R.M. Rodriguez & M.A. Fombella, 1976 †
Genus Aureotesta M. Vavrdová, 1972 †
Genus Auritusphaera Strother, 2008 †
Genus Australiastrum K. Grey, 2005 †
Genus Avalonella Wauthoz & Dorning, 2001 †
Genus Axisphaeridium Eisenack, 1967 †
Genus Bacatisphaera C. Zhou, M.D. Brasier & Y. Xue, 2001 †
Genus Bacillidinium D. Habib & S.D. Knapp, 1982 †
Genus Bacisphaeridium A. Eisenack, 1962 †
Genus Baculatireticulatus T.K. Al-Ameri, 1984 †
Genus Baculimorpha Yan, MS †
Genus Bailikania A.A. Trestshetenkova in Z.A. Akulcheva et al., 1981 †
Genus Baiomeniscus A.R. Loeblich Jr., 1970 †
Genus Baltisphaera G. Burmann, 1970 †
Genus Baltisphaeridium Eisenack, 1958 †
Genus Baltisphaerosum R.E. Turner, 1984 †
Genus Bambuites Sommer, 1971 †
Genus Barakella F.H. Cramer & M. del Carmen R. Díez, 1977 †
Genus Barathrisphaeridium E.R. Wicander, 1974 †
Genus Barbestiastra W.A.S. Sarjeant & R.P.W. Stancliffe, 1994 †
Genus Bartenia R. Helby, 1987 †
Genus Bavlinella E.D. Shepeleva, 1962 †
Genus Beringiella J.P. Bujak, 1984 †
Genus Beromia Vavrdová, 1986 †
Genus Biannulatisphaerities Neville in Neves et al., 1973 †
Genus Biattiglobus ? Zhu et al., 1984 †
Genus Bimerga Wood, 1995 †
Genus Bipatellifera C. Singh, 1983 †
Genus Bisbullatum X. Fang, 1987 †
Genus Bispinosphaera P. Liu, S. Xiao, C. Yin, S. Chen, C. Zhou & M. Li, 2014 †
Genus Bojasphaera G.K. Colbath, 1990 †
Genus Bothroligotriletes B.V. Timofeev, 1958 †
Genus Bothroligotriletum † accepted as Bothroligotriletes B.V. Timofeev, 1958 †
Genus Bothrotrachytriletes ? B.V. Timofeev, 1955 †
Genus Brachiprojectidium D. Habib & S.D. Knapp, 1982 † accepted as Micrhystridium Deflandre, 1938 †
Genus Bresca M.A. Fombella Blanco, 1978 †
Genus Brestovia L.T. Paskeviciené, 1980 †
Genus Briareus A.H. Knoll, 1992 †
Genus Brocholaminaria S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Brochopsophosphaera E.D. Shepeleva in E.D. Shepeleva & B.V. Timofeev, 1963 †
Genus Brochos Vanderflit & Mikhailova, 1992 †
Genus Brochosaccus ? Naumova †
Genus Bubomorpha Yin in Chen, Qian, Lin, Zhang, Wang, Yin & Erdtmann, 1985 †
Genus Buchinia N.A. Volkova, 1990 †
Genus Buedingiisphaeridium Schaarschmidt, 1963 †
Genus Bullatosphaera N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Caelatosphaera R. Wicander, G. Playford & E.B. Robertson, 1999 †
Genus Caelestites F.L. Staplin, 1962 †
Genus Caiacorymbifer H. Tappan & A.R. Loeblich Jr., 1972 † accepted as Ammonidium T.R. Lister, 1970 †
Genus Caldariola Molyneux in Molyneux & Rushton, 1988 †
Genus Calyxia S. Willman in Willman & Moczydłowska, 2008 †
Genus Calyxiella I.N. Golub & N.A. Volkova in Volkova & Golub, 1985 †
Genus Cambrowania Q. Tang & S. Xiao in Tang et al., 2019 † accepted as Leiosphaeridia A. Eisenack, 1958 †
Genus Campenia K. Mädler, 1963 †
Genus Candelasphaeridium J. Deunff, 1978 †
Genus Cantabrica F.H. Cramer, M. del C.R. Diez, R.M. Rodriguez & M.A. Fombella, 1976 †
Genus Carinatosphaeridium Eiserhardt, 1984 †
Genus Carminella F.H. Cramer, 1968 †
Genus Carnarvonia I.C. Cookson & A. Eisenack, 1982 † accepted as Narcarvonia M.E. Dettmann & G. Playford, 1994 †
Genus Carnavonia I.C. Cookson & A. Eisenack, 1982 † accepted as Carnarvonia I.C. Cookson & A. Eisenack, 1982 †
Genus Casiopea M.A. Fombella Blanco, 1978 †
Genus Cassidinium †
Genus Castaneasphaera Zhou, Brasier & Xue, 2001 † accepted as Sinosphaera Y. Zhang, L. Yin, S. Xiao & A.H. Knoll, 1998 †
Genus Catillopsis W.S. Drugg, 1970 †
Genus Caudatopsophosphaera N.G. Pykhova, 1969 †
Genus Caudina M.B. Gnilovskaja in B.M. Keller & A.Y. Rozanov, 1979 †
Genus Caulissoma R. Wicander & G. Playford, 2021 †
Genus Cavaspina M. Moczydłowska, G. Vidal & V.A. Rudavskaja, 1993 †
Genus Celtiberium M.A. Fombella Blanco, 1977 †
Genus Centrasphaeridium R. Wicander & G. Playford, 1985 †
Genus Centrum A.M. Stanevitch in Khomentovsky & Shenfil, 1986 †
Genus Cephalia S.C.D. Sah & R.K. Kar, 1974 †
Genus Cepillum F.H. Cramer, 1964 †
Genus Cerastum R.E. Turner, 1991 †
Genus Ceratocystidiopsis G. Deflandre, 1938 †
Genus Ceratophyton V.V. Kirjanov in Keller & Rozanov, 1979 †
Genus Ceratosphaeridium K. Grey, 2005 †
Genus Cerebrosphaera N.J. Butterfield in Butterfield et al., 1994 †
Genus Cerionopora Y. Zhang & X.-L. Yuan, 1992 †
Genus Chabiosphaera K. Drábek, 1972 †
Genus Chalaziosphaeridium W.A.S. Sarjeant & R.P.W. Stancliffe, 1994 †
Genus Chamaesiphonites P. Palik, 1966 †
Genus Chamosphaera G.C. Geng, 1985 †
Genus Characiosimilis P. Palik, 1966 †
Genus Cheleutochroa A.R. Loeblich Jr. & H. Tappan, 1978 †
Genus Chlamydosphaeridia A. Eisenack, 1971 †
Genus Chlorococcites P. Palik, 1966 †
Genus Chuttecloska A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Cicatricosisphaera Yan, 1984 †
Genus Cingulosphaeridium A.S. Lopuchin in M.I. Neustadt, 1966 †
Genus Circinatisphaera M.A. Miller, 1987 †
Genus Circumiella E.A. Assejeva, 1974 †
Genus Cirrifera I.C. Cookson & A. Eisenack, 1960 †
Genus Cithariplana S.K. Srivastava, 1984 †
Genus Clausiella P. Palik, 1966 †
Genus Clausisphaera F.L. Staplin, 1962 †
Genus Clausites S.L. Van Landingham, 1965 †
Genus Clavata A.M. Stanevitch in Jankauskas, 1989 †
Genus Clavaticystis D. Habib & S.D. Knapp, 1982 †
Genus Cleithronetrum A.R. Loeblich Jr. & H. Tappan, 1978 †
Genus Closteromorpha F. Wang, G. Zhou & Q. Chen, 1980 †
Genus Cobricosphaeridium R. Harland & W.A.S. Sarjeant, 1970 †
Genus Collumosphaera K.P. Jain & S.K. Dutta in Dutta & Jain, 1980 †
Genus Collyngbya N. Wang, 1989 †
Genus Comasphaeridium F.L. Staplin, J. Jansonius & S.A. Pocock, 1965 †
Genus Comorhachia Xiao & Hu in Ding et al., 1996 †
Genus Comptaluta H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Conaticystis D. Habib & S.D. Knapp, 1982 †
Genus Concavaesphaera W. Liu, Z. Yin, B. Pan, B. Shen, L. Dong & G. Li, 2023 †
Genus Concentrica [author?] †
Genus Concentrites B.S. Venkatachala, L.L. Bhandari, A.N. Chaube & M.S. Rawat, 1974 †
Genus Coneosphaera Q.L. Luo, 1991 †
Genus Conglutinatosphaeridium B.V. Timofeev, 1965 †
Genus Conradidium F. Stockmans & Y. Willière, 1969 †
Genus Constrictosphaerina A.S. Lopuchin in M.I. Neustadt, 1966 †
Genus Contextus [author?] †
Genus Conusmorpha ?Yan, MS †
Genus Cooksonella E. Nagy, 1965 †
Genus Cordobesia E.D. Pöthe de Baldis, 1977 †
Genus Cornplanktona S.C.D. Sah & R.K. Kar, 1974 †
Genus Cornuferifusa Jacobson & Achab, 1985 †
Genus Cornutosphaera Sin, 1973 †
Genus Corollasphaeridium Dean & Martin, 1982 †
Genus Coronitesta A. Uutela & R. Tynni, 1991 †
Genus Coronopsis O. Wetzel, 1961 †
Genus Corrugasphaera R.A. Fensome, G.L. Williams, M.S. Barss, J.M. Freeman & J.M. Hill, 1990 †
Genus Corvasphaeridium †
Genus Coryphidium M. Vavrdová, 1972 †
Genus Costataplicata C. Downie, 1974 † accepted as Costatiplicata C. Downie, 1974 †
Genus Costatilobus G. Playford, 1977 †
Genus Costatiplicata C. Downie, 1974 †
Genus Costatosphaerina A.S. Lopuchin in M.I. Neustadt, 1966 †
Genus Crameria T.R. Lister, 1970 †
Genus Crassiangulina S. Jardiné, A. Combaz, L. Magloire, G. Peniguel & G. Vachey, 1972 †
Genus Crassicorium R. Buick & A.H. Knoll, 1999 †
Genus Crassifusa Rodriguez-Gonzalez, 1983 †
Genus Crassisphaeridium E.R. Wicander, 1974 †
Genus Craterisphaeridium J. Deunff, 1981 † accepted as Ammonidium T.R. Lister, 1970 †
Genus Creberlumectum R. Harland & W.A.S. Sarjeant, 1970 †
Genus Crinita N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Cristallinium Vanguestaine, 1978 †
Genus Crucidia E.G. Ottone, 1996 †
Genus Crucigenites P. Palik, 1966 †
Genus Cryptosphaera S.C.D. Sah & R.K. Kar, 1974 †
Genus Cryptostromatium Moreau-Benoît, 1974 †
Genus Cuatrifolia F.H. Cramer, M. del C.R. Diez, R.M. Rodriguez & M.A. Fombella, 1976 †
Genus Cucumiforma Mikhailova, 1986 †
Genus Cucumiformia N.S. Mikhailova in A.A. Istchenko, 1986 † accepted as Cucumiforma Mikhailova, 1986 †
Genus Culcitispina Booth, 1979 †
Genus Cupritia B. Courtinat in Courtinat & Gaillard, 1980 †
Genus Cyclodictyon I.C. Cookson & A. Eisenack, 1958 †
Genus Cycloposphaeridium A. Uutela & R. Tynni, 1991 †
Genus Cyclopsiella W.S. Drugg & A.R. Loeblich Jr., 1967 †
Genus Cylindraceusa Yan, 1984 †
Genus Cymatiogalea J. Deunff, 1961 †
Genus Cymatiomorpha W.C. Elsik & D.L. Dilcher, 1974 †
Genus Cymatiosphaeroides Knoll, 1984 †
Genus Cymbosphaeridium T.R. Lister, 1970 †
Genus Cypandinia T.N. Hermann in Hermann & Podkovyrov, 2002 †
Genus Cystidiopsis E. Nagy, 1965 †
Genus Dactyliotheca G. Claus & B. Nagy, 1962 †
Genus Dactylofusa I.M. Brito & A.S. Santos, 1965 †
Genus Daedalosphaera C.C. Loron, R.H. Rainbird, E.C. Turner, J.W. Greenman & E.J. Javaux, 2019 †
Genus Daidaphore G. Claus & B. Nagy, 1962 †
Genus Daillydium F. Stockmans & Y. Willière, 1969 †
Genus Dasydiacrodium B.V. Timofeev ex G. Deflandre & M. Deflandre-Rigaud, 1962 †
Genus Dasydorus G. Playford & F. Martin, 1984 †
Genus Dasypilula A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Dasyrytidodiacrodium B.V. Timofeev, 1959 †
Genus Dasysphaeridium Zang & Walter, 1992 †
Genus Dateriocradus H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Decahedrella S.B. Manum, 1997 †
Genus Deflandridium E. Nagy, 1969 † accepted as Planctonites W. Krutzsch, 1977 †
Genus Deltoidinia Jiabo, 1978 †
Genus Deltotosoma Playford in Playford & Dring, 1981 †
Genus Demorhethium A.R. Loeblich, Jr. & E.R. Wicander, 1974 †
Genus Densisphaera M. Nagovitsin & K.E. Moczydłowska, 2012 †
Genus Deunffia C. Downie, 1960 †
Genus Deusilites D.O. Hemer & P.W. Nygreen, 1967 †
Genus Devisphaera Q. Tang, N.C. Hughes, N.R. McKenzie, P.M. Myrow & S. Xiao, 2017 †
Genus Diacrocanthidium G. Deflandre & J.-C. Foucher, 1967 †
Genus Diaphorochroa E.R. Wicander, 1974 †
Genus Dichasphaira T.L. Potter, 1974 †
Genus Dichotisphaera R.E. Turner, 1984 †
Genus Dichozonata V.V. Kirjanov, 1978 †
Genus Dicommopalla A.R. Loeblich Jr., 1970 †
Genus Dicrodiacrodium G. Burmann, 1968 †
Genus Dicrospinasphaera X. Yuan & H.J. Hofmann, 1998 †
Genus Dictyochroa H. Górka, 1965 †
Genus Dictyopsophosphaera Naumova, 1964 †
Genus Dictyosphaeridium B.V. Timofeev, 1969 † accepted as Dictyotidium Eisenack, 1955 †
Genus Dictyosphaeridium W. Wetzel, 1952 †
Genus Dicyclopyla N. Wang, 1989 †
Genus Diexallophasis A.R. Loeblich Jr., 1970 †
Genus Dilatiphaera T.R. Lister, 1970 † accepted as Dilatisphaera T.R. Lister, 1970 †
Genus Dilatisphaera T.R. Lister, 1970 †
Genus Dimastigobolus G. Deflandre, 1936 †
Genus Diornatosphaera C. Downie, 1958 †
Genus Diplofusa I.C. Cookson & A. Eisenack, 1960 †
Genus Diplomembrana Yan, 1985 †
Genus Discacerra G. Claus & B. Nagy, 1962 †
Genus Discina Naumova, 1960 †
Genus Discoidella D. Habib, 1970 †
Genus Disnella L.T. Paskeviciené, 1980 †
Genus Disparifusa A.R. Loeblich Jr., 1970 †
Genus Distosphaera Y. Zhang, L. Yin, S. Xiao & A.H. Knoll, 1998 †
Genus Divietipellis E.R. Wicander, 1974 †
Genus Domasia C. Downie, 1960 †
Genus Domasiella Eisenack, 1969 †
Genus Dominopolia V.V. Kirjanov, 1974 †
Genus Dongyesphaera L. Yin, F. Meng, F. Kong & C. Niu, 2020 †
Genus Dorsennidium E.R. Wicander, 1974 †
Genus Downiea E.D. Pöthe de Baldis, 1975 †
Genus Dudleyia Eisenack, 1978 †
Genus Duospinosphaera Q. Ye, J. Li, J. Tong, Z. An, J. Hu & S. Xiao, 2022 †
Genus Dupliciradiatum González, Moreno & Playford, 2005 †
Genus Duplicisphaeridium H. Górka, 1980 †
Genus Duplisphaera M. Moczydlowska, 1998 †
Genus Echinosphaeridium A.H. Knoll, 1992 † accepted as Knollisphaeridium S. Willman & M. Moczydłowska, 2008 †
Genus Ecmelostoiba E.R. Wicander, 1974 †
Genus Ecthymabrachion E.R. Wicander, 1974 †
Genus Ecthymapalla A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Ectypolopus A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Eisenackidium F.H. Cramer & M. del C. Díez de Cramer, 1968 †
Genus Elektoriskos A.R. Loeblich Jr., 1970 †
Genus Elenia Volkova, 1984 †
Genus Eliasum M.A. Fombella Blanco, 1977 †
Genus Ellipsaletes F.H. Cramer, 1966 †
Genus Ellipsoidella P. Palik, 1966 †
Genus Ellipticoporata A.S. Lopuchin in M.I. Neustadt, 1966 †
Genus Enigmadinium Wrenn & Hart, 1988 †
Genus Enneadikosocheia G.K. Colbath, 1979 †
Genus Enretisphaeridium S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Eoaperturilites L. Yin, 1985 †
Genus Eohammatoides ? Yan, 1989 †
Genus Eomarginata T.V. Jankauskas, 1979 †
Genus Eomicrhystridium G. Deflandre, 1968 † accepted as Micrhystridium Deflandre, 1938 †
Genus Eotintinnopsis Li, Chen, Lipps, Gao, Chi & Wu, 2007 †
Genus Eotylotopalla L.M. Yin, 1987 †
Genus Ephelopalla E.R. Wicander, 1974 †
Genus Ephippimorpha Yan, 1984 †
Genus Epicephalopyxis G. Deflandre, 1938 †
Genus Epistomium Turner, 1979 †
Genus Eponula Vavrdová, 1986 †
Genus Ericanthea F.H. Cramer & M. del Carmen R. Díez, 1977 †
Genus Ericiasphaera G. Vidal, 1990 †
Genus Erizum [author?] †
Genus Estiastra A. Eisenack, 1959 †
Genus Estomia [author?] †
Genus Estrella P. Liu & M. Moczydłowska, 2019 †
Genus Ethmosphaeridium B.V. Timofeev, 1971 †
Genus Eucopsisphaera Wang, Xiao, Shi, Xu & Li, 1980 †
Genus Eupoikilofusa F.H. Cramer, 1970 †
Genus Eusphaera Liu, 1982 †
Genus Evittia I.M. Brito, 1966 † accepted as Evittia I.M. Brito, 1967 †
Genus Evittia I.M. Brito, 1967 †
Genus Excultibrachium A.R. Loeblich Jr. & H. Tappan, 1978 †
Genus Exilisphaeridium E.R. Wicander, 1974 †
Genus Exochoderma E.R. Wicander, 1974 †
Genus Eyrea I.C. Cookson & A. Eisenack, 1970 †
Genus Fatkia Vavrdová, 1994 †
Genus Favosina †
Genus Favososphaeridium B.V. Timofeev, 1966 †
Genus Fentonia D.A. Bailey & N.M. Hogg, 1995 † accepted as Limbicysta N.G. Marshall, 1989 †
Genus Ferromia M. Vavrdová in Pokorný, 1979 †
Genus Filisphaeridium F.L. Staplin, J. Jansonius & S. Pocock, 1965 †
Genus Fimbriaglomerella A.R. Loeblich Jr. & W.S. Drugg, 1968 †
Genus Flammulasphaera R.E. Richards & G.L. Mullins, 2003 †
Genus Floris Stanevich in Stanevich & Zheleznyak, 1990 †
Genus Florisphaeridium T.R. Lister, 1970 †
Genus Focusphaera Padilha de Quadros, 1986 †
Genus Foliomorpha Yan, 1985 †
Genus Foveofusa K.M. Lele & A. Chandra, 1972 †
Genus Fractoricoronula G.K. Colbath, 1979 †
Genus Frankea G. Burmann, 1970 †
Genus Fromea I.C. Cookson & A. Eisenack, 1958 †
Genus Fuchunshania Y. Sin & K. Liu, 1978 †
Genus Fueloepia E. Nagy, 1965 †
Genus Fulgisphaeridium J. Deunff, 1980 †
Genus Fulopia E. Nagy, 1965 † accepted as Fueloepia E. Nagy, 1965 †
Genus Fülöpia E. Nagy, 1963 † accepted as Fülöpia E. Nagy, 1965 †
Genus Fülöpia E. Nagy, 1965 † accepted as Fueloepia E. Nagy, 1965 †
Genus Fusicoccus K.E. Nagovitsin, 2000 †
Genus Fusilabellum S.M. Awramik in Awramik & Allison, 1989 †
Genus Fusulites D.O. Hemer & P.W. Nygreen, 1967 † accepted as Fusilites D.O. Hemer & P.W. Nygreen, 1967 †
Genus Galeasphaeridium N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Gangasphaera B. Prasad & R. Asher, 2001 †
Genus Gemma V.A. Luchinina in I.T. Zhuravleva et al., 1982 †
Genus Gemmuloides J. Samuelsson & N.J. Butterfield, 2001 †
Genus Germinosphaera N.S. Mikhailova in Istchenko, 1986 †
Genus Geron F.H. Cramer, 1966 †
Genus Gigadiacrodium Z. Szczepanik, T. Servais & A. Żylińska, 2017 †
Genus Gigantosphaeridium H. Agić, M. Moczydłowska & L.-M Yin, 2015 †
Genus Glaucotesta M. Vavrdová, 1982 †
Genus Globiferum T.N. Hermann & B.V. Timofeev in Jankauskas, 1989 †
Genus Globorotundata A.M. Duane, 1997 †
Genus Globosphaeridium M. Moczydlowska, 1991 †
Genus Globulaesphaeridium R.S. Tiwari & A.A. Moiz, 1971 †
Genus Gloecapsamorphites S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Glottimorpha B.V. Timofeev, 1966 †
Genus Gneudnaella G. Playford in Playford & Dring, 1981 †
Genus Gomphomorpha P. Palik, 1966 †
Genus Gomphosphaeridium L.D. Gao, 1988 †
Genus Goniocystis Y.-Z. Yan, 1991 †
Genus Goniolopadion G. Playford, 1977 †
Genus Goniosphaeridium Eisenack, 1969 †
Genus Gordonirundum E.G. Raevskaya & T. Servais, 2017 †
Genus Gorgonisphaeridium F.L. Staplin, J. Jansonius & S.A. Pocock, 1965 †
Genus Goryniella B.V. Timofeev, 1973 †
Genus Gouhousphaeridium Yang in Yang et al., 1980 †
Genus Gracilisphaeridium A. Eisenack & Cramer in Eisenack et al., 1973 † accepted as Ammonidium T.R. Lister, 1970 †
Genus Granitunica P. Liu, S. Xiao, C. Yin, S. Chen, C. Zhou & M. Li, 2014 †
Genus Granomarginata S.N. Naumova, 1960 †
Genus Granomarginatasphaera Pyatiletov, 1988 †
Genus Granopsophosphaera Naumova, 1964 †
Genus Granularia Kowalski, 1983 †
Genus Gregalocapsa N. Wang, 1989 †
Genus Greinervillites M.N. Bose & R.K. Kar, 1967 †
Genus Guttatisphaeridium E.R. Wicander, 1974 †
Genus Gyalorhethium A.R. Loeblich Jr. & H. Tappan, 1978 †
Genus Gyalosphaeridium Zang & Walter, 1992 †
Genus Gyratosphaerina A.S. Lopuchin in Neustadt, 1966 †
Genus Halophoridia I.C. Cookson & A. Eisenack, 1962 †
Genus Haplocystia K.L. Segroves, 1967 †
Genus Hapsidopalla G. Playford, 1977 †
Genus Helios F.H. Cramer, 1964 †
Genus Heliospermopsis E. Nagy, 1965 †
Genus Heliosphaeridium M. Moczydlowska, 1991 †
Genus Heloriopodum T. Servais & S.G. Molyneux, 1997 †
Genus Helosphaeridium T.R. Lister, 1970 †
Genus Hemibaltisphaeridium F.H. Cramer, 1970 †
Genus Hemideunffia B. Thusu, 1973 †
Genus Hercyniana G. Burmann, 1976 †
Genus Herisphaera C.C. Loron, R.H. Rainbird, E.C. Turner, J.W. Greenman & E.J. Javaux, 2019 †
Genus Heteromorphidion A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Heteropetalia Y. Yan, 1991 †
Genus Hidasia E. Nagy, 1965 †
Genus Hirtellosphaeridium † accepted as Hyrtellosphaeridium [author?] †
Genus Histopalla G. Playford in Playford & Dring, 1981 †
Genus Hocosphaeridium W. Zang & M.R. Walter, 1992 †
Genus Hoegklintia K.J. Dorning, 1981 †
Genus Hogklintia K.J. Dorning, 1981 † accepted as Hoegklintia K.J. Dorning, 1981 †
Genus Holothuriadeigma A.R. Loeblich Jr., 1970 †
Genus Homodiacrodium [author?] †
Genus Homomorpha Y. Xiao & X. Hu in Xiao et al., 1996 †
Genus Hubeisphaera Y.S. Sin & K.Z. Liu, 1978 †
Genus Hyalinsphaeridia P. Bernier & B. Courtinat, 1979 †
Genus Hyalocyrillium C.W. Allison in Allison & Awramik, 1989 †
Genus Hyalosphaera W. Volkheimer & A. Salas, 1976 †
Genus Hymenodiscina Naumova, 1964 †
Genus Hymenophacoides Roblot, 1967 †
Genus Hymenosphaeridium Nadler, MS 1973 †
Genus Hyrtellosphaeridium [author?] †
Genus Hystrichoangulatum Wilson & Hoffmeister in Downie & Sarjeant, 1965 †
Genus Hystrichocorpulentum Willson & Hoffmeister in Downie & Sarjeant, 1965 †
Genus Hystrichosphaeridium S.N. Naumova, 1968 †
Genus Hystrichotriangulatum Andreeva, 1966 †
Genus Iberosphaeridium F.H. Cramer, M. del C.R. Diez, R.M. Rodriguez & M.A. Fombella, 1976 †
Genus Ichnosphaera M. Jachowicz-Zdanowska, 2013 †
Genus Impluviculus A.R. Loeblich Jr & H. Tappan, 1969 †
Genus Incurvatina S.N. Naumova & N.I. Umnova in Umnova, 1975 †
Genus Inderites S.A. Abramova & O.F. Marchenko, 1964 †
Genus Indigestosphaeridium Zang & Walter, 1992 †
Genus Induoglobus A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Ingulecia B.V. Timofeev, 1982 †
Genus Introvertocystis C.M. Mays & J.D. Stilwell, 2012 †
Genus Intubidinium ? Zhou, 2000 †
Genus Involusphaeridium P. Filipiak et al., 2020 †
Genus Iroistella J. Deunff, 1980 †
Genus Izhoria I.N. Golub & N.A. Volkova in Volkova & Golub, 1985 †
Genus Jandiatubaites L.P. de Quadros, 1986 †
Genus Jilinella L.M. Yin, 1987 †
Genus Jilinella Yin, 1984 †
Genus Joehvisphaera A. Uutela & R. Tynni, 1991 †
Genus Joviella K. Matsuoka & J.P. Bujak, 1988 †
Genus Jubatasphaera A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Kapitophyma † accepted as Kiptophyma I.N. Golub in Sokolov, 1979 †
Genus Keltmia N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Kenlidinia Z. Pan in Xu et al., 1997 †
Genus Kerbia P.N. Kolosov & V.A. Rudavskaja in Kolosov, 1984 †
Genus Kildinella B.V. Timofeev in Shepeleva & Timofeev, 1963 †
Genus Kildinosphaera G. Vidal in Vidal & Siedlecka, 1983 †
Genus Kiptophyma I.N. Golub in Sokolov, 1979 †
Genus Kirbia N.S. Mikhailova & N.A. Volkova in Jankauskas, 1989 †
Genus Kladosphaeridium M. Vavrdová, 1990 †
Genus Kladothecidium M. Vavrdová, 1986 †
Genus Knollisphaeridium S. Willman & M. Moczydłowska, 2008 †
Genus Konderia A.F. Weiss, 1983 †
Genus Korojonia I.C. Cookson & A. Eisenack, 1958 †
Genus Krimodiscus Aristova, 1971 †
Genus Kundasphaera Uutela, 1989 ex Uutela & Tynni, 1991 †
Genus Labruscasphaeridium K. Grey, 2005 †
Genus Labyrinthosphaeridium A. Uutela & R. Tynni, 1991 †
Genus Lacunopsophosphaera N.G. Pychova in Rozanov et al., 1969 †
Genus Lacunosphaeridium A. Uutela & R. Tynni, 1991 †
Genus Ladogella I.N. Golub & N.A. Volkova in N.A. Volkova & I.N. Golub, 1985 †
Genus Laminasphaera P. Liu & M. Moczydłowska, 2019 †
Genus Lancettopsis K. Mädler, 1963 †
Genus Lanveocia J. Deunff, 1978 †
Genus Larvimorpha L.M. Yin, 1987 † accepted as Annulusia B.V. Timofeev & T.N. Hermann in Jankauskas, 1989 †
Genus Latoporata S.N. Naumova ex N.I. Umnova in Umnova & Yakovlev, 1970 †
Genus Latoporata S.N. Naumova & N.I. Umnova in Umnova, 1975 † accepted as Priscogalea J. Deunff, 1961 †
Genus Lavradosphaera S. De Schepper & M.J. Head, 2008 †
Genus Laxidium †
Genus Laxidum † accepted as Laxidium †
Genus Lecithodinium D. Habib & S.D. Knapp, 1982 † accepted as Micrhystridium Deflandre, 1938 †
Genus Leffingwellia M.J. Head & G. Norris, 2003 †
Genus Leioaletes B.V. Timofeev, 1955 †
Genus Leioarachnitum Andreeva, 1966 †
Genus Leiodiscina S.N. Naumova, 1968 †
Genus Leiofusa A. Eisenack, 1938 †
Genus Leiofusidium T.V. Jankauskas, 1982 †
Genus Leioligotriletes B.V. Timofeev, 1958 †
Genus Leioligotriletum B.V. Timofeev, 1958 †
Genus Leiomarginata S.N. Naumova, 1960 †
Genus Leiomarginatasphaera †
Genus Leiominuscula S.N. Naumova, 1960 †
Genus Leioplanktona R.K. Kar & R.K. Saxena, 1976 †
Genus Leiopsophosphaera S.N. Naumova, 1960 †
Genus Leiosphaeridia A. Eisenack, 1958 †
Genus Leiosphaeridium F.L. Staplin, 1961 †
Genus Leiovalia Eisenack, 1965 †
Genus Leiozonosphaeridium †
Genus Leoniella F.H. Cramer, 1964 †
Genus Leprotolypa G.K. Colbath, 1979 †
Genus Leptobrachion K.J. Dorning, 1981 †
Genus Leptonia R.Y. Singh, B.S. Rawat & V.J. Gupta, 1978 †
Genus Liadiovitas †
Genus Liepaina T.V. Jankauskas & N.A. Volkova in Volkova et al., 1979 †
Genus Liepana V.V. Kirjanov in Keller & Rozanov, 1979 †
Genus Lignum Y.-S. Xing, 1962 †
Genus Lignum Y.-S. Xing in Xing & Liu, 1973 †
Genus Likropalla G.K. Colbath, 1979 †
Genus Liliosphaeridium A. Uutela & R. Tynni, 1991 †
Genus Limaites L.P. de Quadros, 1986 †
Genus Limbicysta N.G. Marshall, 1989 †
Genus Linotolypa Eisenack, 1962 †
Genus Lititzina Raevskaya & Iskül, 2024 †
Genus Liulaobeinella Yan, 1982 †
Genus Liulaobeisphaera Q. Yang et al., 1980 †
Genus Lobiplanktonia †
Genus Lobomorpha Yan, 1985 †
Genus Lobotheca Vavrdová, 1986 †
Genus Loeblichia Playford & Wicander, 1988 †
Genus Lomatolopas Playford in Playford & Dring, 1981 †
Genus Lontohystrichosphaera B.J. Slater, T.H.P. Harvey & N.J. Butterfield, 2018 †
Genus Lophoaletes †
Genus Lophodiacrodium B.V. Timofeev, 1958 †
Genus Lophodictyotidium S.A.J. Pocock, 1972 †
Genus Lopholigotriletes Alyushinskii et al., 1957 †
Genus Lopholiotriletum B.V. Timofeev, 1959 †
Genus Lophomarginata Pychova, 1969 †
Genus Lophominuscula S.N. Naumova, 1960 †
Genus Lophopsophosphaera S.N. Naumova ex N.I. Umnova in Umnova & Yakovlev, 1970 †
Genus Lophorytidodiacrodium B.V. Timofeev, 1958 †
Genus Lophosphaera †
Genus Lophosphaeridium B.V. Timofeev ex C. Downie, 1963 †
Genus Lophozonodiacrodium B.V. Timofeev, 1959 †
Genus Lua F. Martin & L.-M. Yin, 1988 †
Genus Lunataforma M.A. Miller, M. Vecoli & C. Cesari, 2017 †
Genus Lunulidia A. Eisenack, 1958 †
Genus Lusatia G. Burmann, 1970 †
Genus Luscinasphaera Wicander & Wood, 1997 †
Genus Lusitanium Elaouad-Debbaj, 1981 †
Genus Macroptycha B.V. Timofeev, 1973 ex Timofeev et al., 1976 †
Genus Majasphaeridium T.N. Hermann in Sokolov, 1979 †
Genus Malopatomia M.S. Yakschin, 2002 †
Genus Mamillara S.N. Naumova, 1968 † accepted as Mamillata S.N. Naumova, 1968 †
Genus Mamillata S.N. Naumova, 1968 †
Genus Maranhites I.M. Brito, 1965 †
Genus Margodiscina †
Genus Margomassulina S.N. Naumova ex I.K. Chepikova in Aliev & Chepikov, 1971 †
Genus Margominuscula S.N. Naumova ex T.V. Jankauskas, 1989 †
Genus Margoporata †
Genus Margoporina S.N. Naumova, 1968 †
Genus Margopylomina S.N. Naumova, 1968 † accepted as Margoporina S.N. Naumova, 1968 †
Genus Marrocanium F.H. Cramer, W.H. Kanes, M. del C.R. Díez & R.A. Christopher, 1974 †
Genus Marsupicapsa S. Ouyang, 1979 †
Genus Martinsphaeridium W.A.S. Sarjeant & Vavrdová, 1997 † accepted as Ammonidium T.R. Lister, 1970 †
Genus Massulina †
Genus Mastigophycus F.-X. Wang & Y.-Y. Zhai, 1982 †
Genus Mastosphaera ? C. Yin, 1995 †
Genus Matanomadhia R.K. Kar & R.K. Saxena, 1976 †
Genus Mathurosphaera C.P. Varma & A.K. Dangwal, 1964 †
Genus Matulamorpha F. Wang, G. Zhou & Q. Chen, 1980 †
Genus Mecsekia M. Hajós, 1966 †
Genus Mediocorpore ? S.F. Oliveira, 1991
Genus Medousapalla Wood & Clendening, 1982 †
Genus Megapolybessurus N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Megasacculina S.N. Naumova, 1960 †
Genus Megascina †
Genus Meghystrichosphaeridium Y. Zhang, L. Yin, S. Xiao & A.H. Knoll, 1998 † accepted as Mengeosphaera S. Xiao, C. Zhou, P. Liu, D. Wang & X. Yuan, 2014 †
Genus Meghystrichosphaeridium M. Chen & K. Liu, 1986 † accepted as Asterocapsoides L.M. Yin & Z.P. Li, 1978 †
Genus Mehlisphaeridium K.L. Segroves, 1967 †
Genus Melanosphaera ? F. Wang & Q. Luo in Luo et al., 1982 (1983?) †
Genus Membranites M.H. Al-Ruwaili, 2000 †
Genus Membranolimbus V.S. Maljavkina ex G. Norris & W.A.S. Sarjeant, 1965 †
Genus Membranosphaera P. Liu & M. Moczydłowska, 2019 † accepted as Membranospinosphaera X. Shang & P. Liu, 2024 †
Genus Membranospinosphaera X. Shang & P. Liu, 2024 †
Genus Membrosphaera K.H. Eiserhardt, 1991 †
Genus Mengeosphaera S. Xiao, C. Zhou, P. Liu, D. Wang & X. Yuan, 2014 †
Genus Menneria A.S. Lopuchin, 1971 †
Genus Meridinium M. Vavrdová, 1989 †
Genus Metaleiofusa D. Wall, 1965 †
Genus Metaridium J.B. Riding, S.L. Matthews, N.H. Miles & A. Wolfard, 1998 †
Genus Miaplacidus M.A. Fombella Blanco, 1978 †
Genus Micrhystridium Deflandre, 1938 †
Genus Micrhystridium S.N. Naumova, 1968 †
Genus Microancyratium D. Habib & S.D. Knapp, 1982 †
Genus Microbaculidinium D. Habib & S.D. Knapp, 1982 † accepted as Micrhystridium Deflandre, 1938 †
Genus Microconcentrica S.N. Naumova, 1960 †
Genus Microfasta R. Morgan, 1975 †
Genus Microptycha †
Genus Microsphaera ? Sin in Sin & Liu, 1973 † accepted as Bavlinella E.D. Shepeleva, 1962 †
Genus Microsphaeroides ? X. Hu & Y. Xiao in Xiao et al., 1996 †
Genus Microtaenia Lopukhin, 1974 †
Genus Microvalia R. Tynni & A. Uutela, 1984 †
Genus Miniococcus F. Wang & Q. Luo, 1984 †
Genus Minutisphaeridium Tang & Tao in Cai et al., 1998 †
Genus Minutissima Naumova in Naumova & Pavlovski, 1961 †
Genus Mirificysta J.-X. Yu, 1982 †
Genus Miroedichia T.N. Hermann in Jankauskas, 1989 †
Genus Mirosphaera P. Palik, 1966 †
Genus Mispertonia D. McLean, D.J. Bodman, P. Lucas & J.L. Pendleton, 2018 †
Genus Mitroporata A.S. Lopuchin in Neustadt, 1966 †
Genus Monocrodium P. Pittau, 1985 †
Genus Monosozosphaeridium W.-L. Zang & M.R. Walter, 1992 †
Genus Monostichus X. Zhu in Zhu et al., 1984 †
Genus Monotrematosphaeridium Sin, 1962 †
Genus Monotrematum B.V. Timofeev, 1960 †
Genus Montanella H.D. Pflug, 1965 †
Genus Morcoa M. del Carmen R. Díez & F.H. Cramer, 1977 †
Genus Muhosspora R. Tynni, 1966 †
Genus Multangularites P. Palik, 1966 †
Genus Multicorisphaeridium U. Marheinecke, 1992 †
Genus Multifronsphaeridium Zang & Walter, 1992 †
Genus Multiplicisphaeridium F.L. Staplin, 1961 †
Genus Multisphaeridium † accepted as Multiplicisphaeridium F.L. Staplin, 1961 †
Genus Mutabilisphaera Zang in Gravestock et al., 2001 †
Genus Mycteroligotriletes B.V. Timofeev, 1958 †
Genus Mycteroligotriletum † accepted as Mycteroligotriletes B.V. Timofeev, 1958 †
Genus Naevisphaeridium E.R. Wicander, 1974 † accepted as Ammonidium T.R. Lister, 1970 †
Genus Nagyiella P. Palik, 1966 †
Genus Nannobarbophora D. Habib & S.D. Knapp, 1982 † accepted as Micrhystridium Deflandre, 1938 †
Genus Nanocyclopia A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Narcarvonia M.E. Dettmann & G. Playford, 1994 †
Genus Navifusa A. Combaz, F.W. Lange & J. Pansart, 1967 †
Genus Nellia I.N. Golub & N.A. Volkova in Volkova & Golub, 1985 †
Genus Nemaphylla Y. Xiao & X. Hu in Xiao et al., 1996 †
Genus Neoastrion M.N. Viswanathiah, V. Venkatachalapathy & S.P. Mahalakshmamma, 1979 †
Genus Neofentonia H. Özdikmen, 2009 † accepted as Fentonia D.A. Bailey & N.M. Hogg, 1995 †
Genus Neoveryhachium F.H. Cramer, 1970 †
Genus Nevidia M. Vavrdová, 1966 †
Genus Nexosarium R.E. Turner, 1984 †
Genus Nigrilaminaria S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Ninadiacrodium E.G. Raevskaya & T. Servais, 2009 †
Genus Nirundella E.G. Raevskaya & T. Servais, 2017 †
Genus Nodosus S.E. Hagenfeldt, 1989 †
Genus Nodusosphaeridium A. Uutela, 1989 †
Genus Nollia Eisenack, 1979 †
Genus Nothooidium A.R. Loeblich Jr. & H. Tappan, 1976 †
Genus Nucellohystrichosphaera B.V. Timofeev & T.N. Hermann in Timofeev et al., 1976 †
Genus Nucellosphaera A.M. Stanevitch in Jankauskas, 1989 †
Genus Nucellosphaeridium B.V. Timofeev, 1966 †
Genus Nummus R. Morgan, 1975 †
Genus Nunatsiaquus C.C. Loron, R.H. Rainbird, E.C. Turner, J.W. Greenman & E.J. Javaux, 2019 †
Genus Ocalasphaera K.F. Prössl, 1992 †
Genus Ocridoligotriletes B.V. Timofeev, 1958 †
Genus Ocridoligotriletum † accepted as Ocridoligotriletes B.V. Timofeev, 1958 †
Genus Ocridosphaeridium B.V. Timofeev, 1973 †
Genus Octaedryxium V.A. Rudavskaja in Vozzhennikova & Timofeev, 1973 †
Genus Octahedronoides Granier, 2024 †
Genus Octaplata S.C.D. Sah & R.K. Kar, 1974 †
Genus Octoedryxium V.A. Rudavskaja, 1973 †
Genus Octogonium F. Martin, 1974 † accepted as Coryphidium M. Vavrdová, 1972 †
Genus Odontomorpha M. Hajós, 1966 †
Genus Odontothrix D. Habib & S.D. Knapp, 1982 †
Genus Okridoligotriletes Y.A. Alyushinskii et al., 1957 †
Genus Olenekus A.M. Stanevich in Stanevich et al., 2009 †
Genus Oligopogonium A.R. Loeblich Jr. & H. Tappan, 1976 †
Genus Ollula F. Góczán, 1962 †
Genus Omalophyma I.N. Golub in Sokolov, 1979 †
Genus Onondagella F.H. Cramer, 1966 †
Genus Ooidium B.V. Timofeev, 1957 †
Genus Operculites K.R. Newman, 1965 †
Genus Ophiobolus O. Wetzel, 1933 † accepted as Scuticabolus A.R. Loeblich III, 1967 †
Genus Oppilatala A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Orbiculus L.L. Bagdasaryan, 1980 †
Genus Ordovicidium H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Orgulla P.N. Kolosov & V.A. Rudavskaja in Kolosov, 1984 †
Genus Ornatasphaera R.K. Saxena, A. Chandra & M.G.A.P. Setty, 1982 †
Genus Ornatopila P. Palik, 1966 †
Genus Ornatosphaeridia R.N. Ogurtsova, 1975 †
Genus Orthosphaeridium Eisenack, 1968 †
Genus Orycmatosphaeridium B.V. Timofeev, 1959 † accepted as Orygmatosphaeridium B.V. Timofeev, 1959 †
Genus Orygmatosphaeridium B.V. Timofeev, 1959 †
Genus Oscenoscaeva G. Claus & B. Nagy, 1962 †
Genus Oscillatorites P. Palik, 1966 †
Genus Osculosphaera N.J. Butterfield in Butterfield et al., 1994 †
Genus Oshania F. Wang, G. Zhou & Q. Chen, 1980 †
Genus Ostiumsphaeridium N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Oudhkusumites N.C. Srivastava, 1967 †
Genus Ova † accepted as Ovum A. Eisenack, 1931 †
Genus Ovalisacculina Naumova †
Genus Ovnia F.H. Cramer & M. del Carmen R. Díez, 1977 †
Genus Ovulum T.V. Jankauskas, 1975 †
Genus Ovum A. Eisenack, 1931 †
Genus Ozotobrachion A.R. Loeblich Jr. & W.S. Drugg, 1968 †
Genus Pachysphaeridium G. Burmann, 1970 †
Genus Pachyspheridium G. Burmann, 1970 † accepted as Pachysphaeridium G. Burmann, 1970 †
Genus Palacanthus E.R. Wicander, 1974 †
Genus Palaeasphaeridium Yin † accepted as Paleasphaeridium C.-Y. Yin, 1985 †
Genus Palaeobion O. Wetzel, 1961 †
Genus Palaeocladophora C. Eklund, 1990 †
Genus Palaeocryptidium G. Deflandre, 1955 †
Genus Palaeodiacrodium Y. Xing & L. Gao in Gao et al., 1995 †
Genus Palaeoharpastum R.A. Fensome, G.L. Williams, M.S. Barss, J.M. Freeman & J.M. Hill, 1990 †
Genus Palaeohystrichosphaeridium K.H. Eiserhardt, 1986 †
Genus Palaeomonostroma C. Eklund, 1990 †
Genus Palaeostomocystis Deflandre, 1935 †
Genus Palaeovolvox W.-L. Zang & M.R. Walter, 1992 †
Genus Palaiosphaeridium H. Górka, 1980 †
Genus Palanaea S.C.D. Sah & R.K. Kar, 1974 †
Genus Paleamorpha Y.S. Sin & K.Z. Liu, 1978 †
Genus Paleasphaeridium C.-Y. Yin, 1985 †
Genus Paleopedicystus F.L. Staplin, 1961 †
Genus Paleoperisaccus †
Genus Paleoraphidia W. Brenner & C.B. Foster, 1994 †
Genus Palhistiodinia G. Deflandre, 1939 †
Genus Paniculaferum M.A. Miller, 1991 †
Genus Papiliotypus H. Hashemi & G. Playford, 1998 †
Genus Papilliferum L.M. Yin, 1987 †
Genus Papillomembrana N. Spjeldnaes, 1963 †
Genus Papinochium M. Ters & G. Deflandre, 1966 †
Genus Papulogabata G. Playford in Playford & Dring, 1981 †
Genus Parachitina A. Eisenack, 1937 †
Genus Paracymatiosphaera F. Wang, 1985 † accepted as Comasphaeridium F.L. Staplin, J. Jansonius & S.A. Pocock, 1965 †
Genus Parahorologinella C.-Q. He & W.-B. Li, 2004 †
Genus Paralecaniella I.C. Cookson & A. Eisenack, 1970 †
Genus Pararhombodella J. Xu, Z. Pan, Y. Yang, Y. Zhu & N. Fan, 1997 †
Genus Parashouhsienia S. Sun, 2006 †
Genus Pardaminela M. del Carmen R. Díez & F.H. Cramer, 1977 †
Genus Passalosphaera G. Playford & R. Wicander, 1988 †
Genus Paucilobimorpha J. de Coninck, 1986 †
Genus Pavlovskya S.N. Naumova in Naumova & Pavlovsky, 1961 †
Genus Pennatosphaeridium K. Grey, 2005 †
Genus Pentagonium P. Snopková & O. Samuel, 1982 † accepted as Angularia S.R. Samoilovitch ex G. Norris & W.A.S. Sarjeant, 1965 †
Genus Peramorpha F. Martin in Martin & Dean, 1983 †
Genus Percultisphaera T.R. Lister, 1970 †
Genus Peregrinixia D. Habib & S.D. Knapp, 1982 †
Genus Perforela M. del Carmen R. Díez & F.H. Cramer, 1977 †
Genus Perforella M. del Carmen R. Díez & F.H. Cramer, 1977 † accepted as Perforela M. del Carmen R. Díez & F.H. Cramer, 1977 †
Genus Perissolagonella A.R. Loeblich Jr. & E.R. Wicander, 1976 †
Genus Perticiella C.-Q. He, R.-Q. Gao & X.-Y. Qiao, 1992 †
Genus Pertusidisca M.A. Miller, M. Vecoli & C. Cesari, 2017 †
Genus Pertusisphaeridium R.E. Turner, 1986 † accepted as Ammonidium T.R. Lister, 1970 †
Genus Petaloferidium S.R. Jacobson, 1978 †
Genus Peteinosphaeridium F.L. Staplin, J. Jansonius & S. Pocock, 1965 †
Genus Petrovina S. Loboziak, J.H.G. Melo, L.P. Quadros & M. Streel, 1997 †
Genus Phenacoon M. Vecoli & G. Playford, 1997 †
Genus Pheoclosterium H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Phoenisphaeridium J. Deunff in Eisenack et al., 1976 †
Genus Phormidites P. Palik, 1966 †
Genus Picostella F.H. Cramer, B. Allam, W.H. Kanes & M. del C.R. Díez, 1974 †
Genus Pictonicopila G. Deflandre & M. Ters, 1966 †
Genus Piliferosphaera A.R. Loeblich Jr., 1970 †
Genus Pinocchiodinium S. Torricelli, 2000 †
Genus Piperodinium P.J. Mudie in Scott et al., 1984 †
Genus Pirea M. Vavrdová, 1972 †
Genus Piyuancunella †
Genus Plagasphaera L.-M. Yin, K. Wang, Z. Shen & Y.-L. Zhao, 2021 †
Genus Planctonites W. Krutzsch, 1977 †
Genus Platycystidia I.C. Cookson & A. Eisenack, 1960 †
Genus Plicatofusa L.I. Sheshegova, 1984 †
Genus Plicatosphaera Potter in Baudelot & Géry, 1979 †
Genus Plicatosphaeridium N.J. Butterfield, 2005 †
Genus Podoliella B.V. Timofeev, 1973 †
Genus Podolina T.N. Hermann in Timofeev et al., 1976 †
Genus Poikilofusa F.L. Staplin, J. Jansonius & S.A. Pocock, 1965 †
Genus Pololeptus L. Yin in Yin & Sun, 1994 †
Genus Polonosphaeridium H. Górka, 1987 †
Genus Polyacuata †
Genus Polyancistrodorus A.R. Loeblich Jr. & H. Tappan, 1969 †
Genus Polydeunffia F.H. Cramer, 1970 †
Genus Polyedrina L.P. de Quadros, 1986 †
Genus Polyedrosphaeridium B.V. Timofeev, 1962 †
Genus Polyedrosphaeridium B.V. Timofeev, 1966 † accepted as Kildinella B.V. Timofeev in Shepeleva & Timofeev, 1963 †
Genus Polyedryxium J. Deunff, 1954 †
Genus Polyforama S.N. Naumova in Pykhova, 1969 †
Genus Polygoniomorpha F. Wang, G. Zhou & Q. Chen, 1980 †
Genus Polygonium M. Vavrdová, 1966 †
Genus Polyhedrosphaeridium W.-L. Zang in Zang & Walter, 1992 † accepted as Alicesphaeridium W.-L. Zang in Zang & Walter, 1992 †
Genus Polynucella Y.-S. Xing & G.-Z. Liu, 1973 †
Genus Polyplanifer F.H. Cramer, 1964 †
Genus Polyporata Pykhova, 1966 †
Genus Polyporata Y.-S. Xing & G.-Z. Liu, 1973 †
Genus Polyvalvaphycus Q.-L. Luo & F.-X. Wang in Luo et al., 1982 †
Genus Porusphaera Jiabo, 1978 †
Genus Praedermocarpites S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Pratulasphaera R. Wicander & G. Playford, 1985 †
Genus Priscogalea J. Deunff, 1961 †
Genus Priscotheca J. Deunff, 1961 †
Genus Prismatocystis D. Habib, 1969 †
Genus Prolaminarites ? L.N. Iltchenko, 1972 †
Genus Prolatoforma N.S. Mikhailova in Mikhailova & Podkovyrov, 1992 †
Genus Prolixosphaeridiopsis N.M. Hogg & D.A. Bailey, 1997 †
Genus Proteolobus G.D. Wood, 1997 †
Genus Proteus A.M. Stanevich, ? 2007 †
Genus Protoarchaeosacculina S.N. Naumova, 1960 †
Genus Protoleioligotriletum †
Genus Protoleiosphaeridium B.V. Timofeev ex B.V. Timofeev, 1960 †
Genus Protolophosphaeridium B.V. Timofeev, 1963 †
Genus Protomassulina S.N. Naumova, 1968 †
Genus Protomycterosphaeridium B.V. Timofeev, 1963 †
Genus Protonucellosphaeridium B.V. Timofeev, 1963 †
Genus Protoocridosphaeridium B.V. Timofeev, 1962 †
Genus Protosphaeridium B.V. Timofeev, 1966 †
Genus Prototracheites S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Prototrachysphaeridium B.V. Timofeev, 1963 †
Genus Prototrematosphaeridium B.V. Timofeev, 1962 †
Genus Prototylosphaeridium B.V. Timofeev, 1963 †
Genus Protovavososphaeridium B.V. Timofeev, 1963 †
Genus Protozonosphaeridium B.V. Timofeev, 1963 †
Genus Psenotopus H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Pseudodiacrodium Y.S. Sin & K.Z. Liu, 1978 †
Genus Pseudofavososphaera Y. Xing, 1982 †
Genus Pseudofromea D. Burger, 1980 †
Genus Pseudolunulidia I.M. Brito & A.S. Santos, 1965 †
Genus Pseudomaranhites L.P. Quadros, 1996 † accepted as Maranhites I.M. Brito, 1965 †
Genus Pseudomasia J. De Coninck, 1969 †
Genus Pseudosaccatina Naumova [date?] †
Genus Pseudotasmanites V.V. Kirjanov, 1974 †
Genus Pseudozonosphaera Xing & Liu, 1973 †
Genus Pseudozonosphaeridium Andreeva, 1966 †
Genus Psilosphaera S.C.D. Sah & R.K. Kar, 1974 †
Genus Pterocystidiopsis G. Deflandre, 1938 †
Genus Pteroidea L.I. Sheshegova, 1975 †
Genus Pterospermopsimorpha B.V. Timofeev, 1962 † accepted as Pterospermopsimorpha B.V. Timofeev, 1966 †
Genus Pterospermopsimorpha B.V. Timofeev, 1966 †
Genus Pterotosphaerula F.H. Cramer, 1966 †
Genus Pulvinomorpha B.V. Timofeev, 1966 † accepted as Pulvinosphaeridium A. Eisenack, 1954 †
Genus Pulvinosphaeridium A. Eisenack, 1954 †
Genus Pustulisphaera Y. Zhang, L. Yin, S. Xiao & A.H. Knoll, 1998 †
Genus Pustulisphaeridium E.R. Wicander, 1974 †
Genus Puteoscortum E.R. Wicander & A.R. Loeblich Jr., 1977 † accepted as Ammonidium T.R. Lister, 1970 †
Genus Pylantios M. Quintavalle & G. Playford, 2006 †
Genus Pyloferites L.P. de Quadros, 1999 †
Genus Pytinomorpha G. Playford & R. Wicander, 1988 †
Genus Quadraditum F.H. Cramer, 1964 †
Genus Quadranidium R.P.W. Stancliffe & W.A.S. Sarjeant, 1996 † accepted as Dorsennidium E.R. Wicander, 1974 †
Genus Quadrina J.P. Bujak in J.P. Bujak, C. Downie, G.L. Eaton & G.L. Williams, 1980 †
Genus Quadruilobus H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Qualeamorpha †
Genus Quantostrobilium W.A.S. Sarjeant & R.P.W. Stancliffe, 1996 †
Genus Quisquilites L.R. Wilson & J.B. Urban, 1963 †
Genus Radialetes G. Playford, 1963 †
Genus Radialorhachia Y. Xiao & X. Hu in Xiao et al., 1996 †
Genus Radiata A.M. Stanevich, 1987 †
Genus Radiatosphaera T.N. Hermann in Hermann & Podkovyrov, 2002 †
Genus Radiophycus F. Wang, 1985 †
Genus Raphesphaera N.A. Volkova, 1990 †
Genus Raplasphaera A. Uutela & R. Tynni, 1991 †
Genus Recticystis Schrank, 2003 †
Genus Retialetes F.L. Staplin, 1960 †
Species Retialetes bobrikii (Byvsheva, 1967) Byvsheva, 1985 †
Species Retialetes quilonensis Rao & Rumanujam, 1975 †
Species Retialetes radforthii Staplin, 1960 †
Genus Reticella H. Agić, 2015 †
Genus Reticulatopora N. Wang, 1989 †
Genus Reticultum †
Genus Reticulum [author?] † accepted as Reticultum †
Genus Retiforma N.S. Mikhailova in Mikhailova & Podkovyrov, 1987 †
Genus Retinarites S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Retisphaera W. Li, 1984 †
Genus Retisphaeridium F.L. Staplin, J. Jansonius & S.A. Pocock, 1965 †
Genus Revinotesta M. Vanguestaine, 1974 †
Genus Rhachosoarium H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Rhacobrachion K.J. Dorning, 1981 †
Genus Rhaetosphaeridium W.A.S. Sarjeant & M. Vavrdová, 1997 †
Genus Rhiptosocherma A.R. Loeblich Jr. & H. Tappan, 1978 †
Genus Rhizophocum †
Genus Rhombodella I.C. Cookson & A. Eisenack, 1962 †
Genus Rhopaliophora H. Tappan & A.R. Loeblich Jr., 1972 †
Genus Riculasphaera A.R. Loeblich Jr. & W.S. Drugg, 1968 †
Genus Rifeniata S.N. Naumova, 1968 † accepted as Rifenita S.N. Naumova, 1968 †
Genus Rifenita S.N. Naumova, 1968 †
Genus Rimosicysta N.G. Marshall, 1989 †
Genus Rosella A.M. Stanevitch in Jankauskas, 1989 †
Genus Rugasphaera Jiabo, 1978 †
Genus Rugasphaera F. Martin in Martin & Dean, 1988 † accepted as Corrugasphaera R.A. Fensome, G.L. Williams, M.S. Barss, J.M. Freeman & J.M. Hill, 1990 †
Genus Rugidinium S.A.J. Pocock & W.A.S. Sarjeant in Pocock, 1972 †
Genus Rugocystis B.S. Venkatachala, L.L. Bhandari, A.N. Chaube & M.S. Rawat, 1974 †
Genus Rugosopsophosphaera S.N. Naumova, 1964 †
Genus Rugospinasphaera P. Liu & C. Yin, 2005 †
Genus Rugulasphaeridium D.C. Bharadwaj, R.S. Tiwari & B.S. Venkatachala, 1971 †
Genus Rugulidium F.H. Cramer, W.H. Kanes, M. del C.R. Díez & R.A. Christopher, 1974 †
Genus Ruvalia N.A. Volkova, 1999 †
Genus Saccosphaera N. Baltes, 1969 †
Genus Sacculidium C. Ribecai, E. Raevskaya & M. Tongiorgi, 2002 †
Genus Safirotheca M. Vavrdová, 1989 †
Genus Sagatum M. Vavrdová & J. Bek, 2001 †
Genus Saharidia A. Combaz, 1968 †
Genus Saharifusa E.D. Pöthe de Baldis, 1997 †
Genus Salopidium K.J. Dorning, 1981 †
Genus Sandbica Raevskaya & Iskül, 2024 †
Genus Sanduina N. Wang, 1989 †
Genus Sangarella A.F. Fradkina & E.B. Pestchevitskaya in Pestchevitskaya & Fradkina, 2001 †
Genus Sarmenta M.B. Gnilovskaja in Keller & Rozanov, 1979 †
Genus Satka T.V. Jankauskas, 1979 †
Genus Saturnus F.H. Cramer, 1966 †
Genus Savitrinia E. Nagy, 1966 †
Genus Scalariphycites S. Ouyang, L. Yin & Z. Li, 1974 †
Genus Scalenadiacrodium T.L. Potter, B.E. Pedder & S. Feist-Burkhardt, 2012 †
Genus Scaphita B.V. Timofeev, 1973 ex Timofeev in Timofeev et al., 1976 †
Genus Scaphospinosa B.V. Timofeev in Timofeev et al., 1976 †
Genus Scheplelevia Aristova, 1971 †
Genus Schismatosphaeridium F.L. Staplin, J. Jansonius & S. Pocock, 1965 †
Genus Schizocystia I.C. Cookson & A. Eisenack, 1962 †
Genus Schizodiacrodium G. Burmann, 1968 †
Genus Schizodiocrodium G. Burmann, 1968 † accepted as Schizodiacrodium G. Burmann, 1968 †
Genus Schizofusa Y. Yan, 1983 †
Genus Schizospora Y. Yan, 1995 †
Genus Schizosporites †
Genus Schizovalvia Yan, 1985 †
Genus Scuticabolus A.R. Loeblich III, 1967 †
Genus Senzeillea F. Stockmans & Y. Willière, 1969 †
Genus Sertulasphaera †
Genus Sertulidium M. Quintavalle & G. Playford, 2006 †
Genus Shorikhosphaeridium Sergeev, 2001 †
Genus Sibiriella Z.K. Fajzulina in Akulcheva et al., 1981 †
Genus Sicyoideum C.-Q. He, 1980 † accepted as Sicyoidium C.-Q. He, 1980 †
Genus Sicyoidium C.-Q. He, 1980 †
Genus Sicyomorpha F. Wang, G. Zhou & Q. Chen, 1980 †
Genus Siderolappa G. Claus & B. Nagy, 1962 †
Genus Simia N.S. Mikhailova & T.V. Jankauskas in Jankauskas, 1989 †
Genus Simsangia S.K. Baksi, 1962 †
Genus Sinianella Yin, 1980 †
Genus Sinosphaera Y. Zhang, L. Yin, S. Xiao & A.H. Knoll, 1998 †
Genus Sirius M.A. Fombella Blanco, 1978 †
Genus Sivaglicania † accepted as Germinosphaera N.S. Mikhailova in Istchenko, 1986 †
Genus Skiagia C. Downie, 1982 †
Genus Sol F.H. Cramer, 1964 †
Genus Solatisphaera E.R. Wicander & A.R. Loeblich Jr., 1977 †
Genus Solisphaeridium F.L. Staplin, J. Jansonius & S. Pocock, 1965 †
Genus Solita F.H. Cramer, 1970 † accepted as Sol F.H. Cramer, 1964 †
Genus Somphophragma G. Playford in Playford & Dring, 1981 †
Genus Somphosphaeridium Zang & Walter, 1992 †
Genus Sphaeranasillos C.W. Allison in Allison & Awramik, 1989 †
Genus Sphaeromorpha N. Baltes, 1969 †
Genus Sphaeroporalites D.O. Hemer & P.W. Nygreen, 1967 †
Genus Sphaerosomatites Rothpletz, 1880 †
Genus Spicadinium D.J. Batten & J.K. Lister, 1988 †
Genus Spinasphaera R.K. Kar & R.K. Saxena, 1976 †
Genus Spinomargosphaera X. Shang & P. Liu, 2024 †
Genus Spinuliferites T.-C. Huang, 1981 †
Genus Spiromorpha L. Yin, X. Yuan, F. Meng & J. Hu, 2005 †
Genus Spirostilus Y. Xiao & X. Hu in Xiao et al., 1996 †
Genus Spongocystia K.L. Segroves, 1967 †
Genus Spumenosphaeridium Dscharkova in Zharkova et al., 1967 †
Genus Spumiosa S.N. Naumova, 1968 †
Genus Spumiosina Lopukhin, 1966 †
Genus Spumosata Naumova †
Genus Spumosina S.N. Naumova, 1968 †
Genus Spumososphaera Naumova †
Genus Spurimoyeria E.R. Wicander & A.R. Loeblich Jr., 1977 †
Genus Staplinites S.L. Van Landingham, 1965 †
Genus Staplinium Jansonius, 1962 †
Genus Starostina †
Genus Stellarossica V.G. Vorob'eva & V.N. Sergeev, 2018 †
Genus Stellechinatum R.E. Turner, 1984 †
Genus Stelliferidium J. Deunff, H. Górka & R. Rauscher, 1974 †
Genus Stellinium S. Jardiné, A. Combaz, L. Magloire, G. Peniguel & G. Vachey, 1972 †
Genus Stelomorpha L. Yin, 1994 † accepted as Ampullula E. Righi, 1991 †
Genus Stemmatopila G. Claus & B. Nagy, 1962 †
Genus Stenomarginata [author?] †
Genus Stenozonaletes E.M. Andreeva, 1962 †
Genus Stenozonoaletes †
Genus Stenozonoligotriletes B.V. Timofeev, 1958 †
Genus Stephanodiacrodium Vavrdová, 1986 †
Genus Sticcasphaeridium Zang & Walter, 1992 †
Genus Stictosoma R. Wicander, G. Playford & E.B. Robertson, 1999 †
Genus Stictosphaeridium B.V. Timofeev, 1966 †
Genus Stictosphaeridium B.V. Timofeev, 1962 † accepted as Stictosphaeridium B.V. Timofeev, 1966 †
Genus Strablosphaeridium H. Górka, 1980 †
Genus Stratimorphis E.A. Assejeva in Shulga, 1976 † accepted as Spumosina S.N. Naumova, 1968 †
Genus Striasphaera G. Liu in Gao et al., 1995 †
Genus Striatostellula W.A.S. Sarjeant & R.P.W. Stancliffe, 1994 †
Genus Striatotheca G. Burmann, 1970 †
Genus Stromacolumna Wang, Xiao, Shi, Xu & Li, 1980 †
Genus Studenicia E.A. Assejeva in Teslenko, 1982 †
Genus Stylodiniopsis A. Eisenack, 1954 †
Genus Sulcatosphaeridium S.N. Naumova ex N.I. Umnova in Umnova & Yakovlev, 1970 †
Genus Sulcodiscus F. Góczán, 1997 †
Genus Sulcusicystis Y.-H. Bai in Bai et al., 1983 †
Genus Sumenosphaeridium C. Yin in Yin & Liu, 1988 † accepted as Eotylotopalla L.M. Yin, 1987 †
Genus Suxianella Yan in Wang (ed.), 1984 †
Genus Svenkodinium Gedl, 1996 † accepted as Nannobarbophora D. Habib & S.D. Knapp, 1982 †
Genus Sylvanidium A.R. Loeblich Jr., 1970 †
Genus Symplassosphaeridium B.V. Timofeev ex B.V. Timofeev, 1966 †
Genus Synsphaeridium Eisenack, 1965 †
Genus Synsphaeridium B.V. Timofeev, 1966 †
Genus Tabulimicrocystis D. Habib & S.D. Knapp, 1982 †
Genus Tadasum Raevskaya & Iskül, 2024 †
Genus Taedigerasphaera K. Grey, 2005 †
Genus Taeniatum Y.-S. Xing in Xing & Liu, 1973 †
Genus Taeniatum Y.-S. Xing, 1962 † accepted as Taeniatum Y.-S. Xing in Xing & Liu, 1973 †
Genus Taeniosphaera P. Liu & C. Yin, 2005 †
Genus Taeniosphaeridium A. Uutela & R. Tynni, 1991 †
Genus Talcheridium A. Tripathi, 1999 †
Genus Tanarium S.P. Kolosova, 1991 †
Genus Tappania Yin, 1997 †
Genus Tariccrodium P. Pittau, 1995 †
Genus Tchuja A.M. Stanevitch in Khomentovsky & Shenfil, 1986 †
Genus Tectitheca G. Burmann, 1968 †
Genus Tectocorpidium Jiabo, 1978 †
Genus Tectosphaeridium P. Dufka, 1990 †
Genus Teichertodinium S.A.J. Pocock & W.A.S. Sarjeant, 1972 †
Genus Teleostomata M. Kondas, P. Filipiak & P. Breuer, 2022 †
Genus Temporina S.C.D. Sah & R.K. Kar, 1974 †
Genus Tenuirica G. Playford & R. Wicander, 1988 †
Genus Tenuisphaeridium Dscharkova in Zharkova et al., 1967 †
Genus Teophipolia V.V. Kirjanov in Keller & Rozanov, 1979 †
Genus Tessellaesphaera C.B. Foster, 1979 †
Genus Tetrabrachiophora A. Eisenack, 1954 †
Genus Tetradinium Vavrdová, 1973 † accepted as Tetraniveum Vavrdová, 1976 †
Genus Tetraedrixium B.V. Timofeev, 1973 †
Genus Tetraniveum Vavrdová, 1976 †
Genus Tetrasphaera B.V. Timofeev & T.N. Hermann in Sokolov, 1979 †
Genus Tetraveryhachium W.P.W. Stancliffe & W.A.S. Sarjeant, 1994 † accepted as Veryhachium J. Deunff, 1954 †
Genus Thecatovalvia Y.-Z. Yan, 1995 †
Genus Thyalnum †
Genus Thymadora J.A. Clendening & G.D. Wood, 1981 †
Genus Thysanoprobolus A.R. Loeblich Jr. & H. Tappan, 1970 †
Genus Tilosphaeridium † accepted as Tylosphaeridium B.V. Timofeev, 1966 †
Genus Timanisphaera N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Timofeevia M. Vanguestaine, 1978 †
Genus Tinnajaphyton P.N. Kolosov, 1982 †
Genus Tongzia Li, 1987 †
Genus Tophoporata Pykhova, 1973 †
Genus Torgia A.E. Grigorieva & P.N. Kolosov in Jankauskas, 1989 †
Genus Tornacia F. Stockmans & Y. Willière, 1966 †
Genus Toroformis A.S. Lopukhin, 1972 †
Genus Torridoniphycus Z. Zhang, 1982 †
Genus Trachyaletes B.V. Timofeev †
Genus Trachyarachnitum Andreeva, 1966 †
Genus Trachydiacrodium B.V. Timofeev ex G. Deflandre & M. Deflandre-Rigaud, 1962 †
Genus Trachydiscina Naumova †
Genus Trachyhystrichosphaera B.V. Timofeev & T.N. Hermann in Timofeev et al., 1976 †
Genus Trachyhystrichosphaeridium † accepted as Trachyhystrichosphaera B.V. Timofeev & T.N. Hermann in Timofeev et al., 1976 †
Genus Trachymarginata S.N. Naumova ex N.I. Umnova in Umnova & Yakovlev, 1970 †
Genus Trachyminuscula Naumova, 1961 †
Genus Trachyoligotriletes B.V. Timofeev, 1958 ex Timofeev, 1960 †
Genus Trachyoligotriletum †
Genus Trachypsophosphaera Naumova, 1964 †
Genus Trachyrytidodiacrodium B.V. Timofeev, 1959 †
Genus Trachysphaeridium B.V. Timofeev ex B.V. Timofeev, 1966 †
Genus Trachytriletes Naumova, 1939 †
Genus Trachyvalia Y.-Z. Yan, 1995 †
Genus Trachyzonodiacrodium B.V. Timofeev, 1959 † accepted as Trachydiacrodium B.V. Timofeev ex G. Deflandre & M. Deflandre-Rigaud, 1962 †
Genus Tranvikium R. Tynni, 1982 †
Genus Trematoligotriletum B.V. Timofeev, 1959 †
Genus Trematophora Eisenack, 1965 †
Genus Trematosphaera S.N. Naumova, 1968 †
Genus Trematosphaeridium B.V. Timofeev, 1959 †
Genus Tresarcus R. Tropepi & C. Ribecai, 2000 †
Genus Tretopilula G.K. Colbath, 1990 †
Genus Tretosohyrtana G.K. Colbath, 1979 †
Genus Trialetes Naumova †
Genus Triangulina F.H. Cramer, 1964 † accepted as Tyligmasoma G. Playford, 1977 †
Genus Triangumorpha Xing & Liu, 1973 †
Genus Tribulidium M. Quintavalle & G. Playford, 2006 †
Genus Tricholigotriletum B.V. Timofeev, 1959 †
Genus Trichosphaeridium B.V. Timofeev, 1966 †
Genus Trilobatum X. Fang, 1987 †
Genus Triporina S.N. Naumova, 1939 †
Genus Tritonites N.G. Marshall & A.D. Partridge, 1988 † accepted as Paucilobimorpha J. de Coninck, 1986 †
Genus Truncatisphaeridium J.B. Riding & S. Duxbury, 1993 †
Genus Trunculumarium A.R. Loeblich Jr. & H. Tappan, 1976 †
Genus Tryannus G.D. Wood & A.O. Tekbali, 1987 † accepted as Tyrannus G.D. Wood & A.O. Tekbali, 1987 †
Genus Tschividinella Pykhova, 1970 †
Genus Tuberculum E.Y. Golubkov, I.M. Bobrovskiy, E.A. Kushim & Y.V. Plotkina, 2021 †
Genus Tubulifera J. Schumacker-Lambry, 1978 †
Genus Tubulosphaera T. Palacios in Palacios & Moczydłowska, 1998 †
Genus Tubulospina R.J. Davey, 1970 †
Genus Tunisphaeridium J. Deunff & W.R. Evitt, 1968 †
Genus Turuchanica V.A. Rudavskaya, 1964 †
Genus Tyligmasoma G. Playford, 1977 †
Genus Tyloligotriletes † accepted as Tyloligotriletum B.V. Timofeev, 1959 †
Genus Tyloligotriletum B.V. Timofeev, 1959 †
Genus Tylosphaeridium B.V. Timofeev, 1966 †
Genus Tylotopalla A.R. Loeblich Jr., 1970 †
Genus Tyrannus G.D. Wood & A.O. Tekbali, 1987 †
Genus Ulanisphaeridium A. McMinn, 1982 †
Genus Umbellasphaeridium S. Jardiné, A. Combaz, L. Magloire, G. Peniguel & G. Vachey, 1972 †
Genus Uncinisphaera E.R. Wicander, 1974 †
Genus Undosisphaera Volkova, 1999 †
Genus Unellium R. Rauscher, 1969 †
Genus Uniferata Naumova †
Genus Uniporata Naumova in Pykhova, 1969 †
Genus Unispinosisphaeridium ? Zang in Gravestock et al., 1997 †
Genus Uranidium S.R. Jacobson & A. Achab, 1985 †
Genus Uraphyton P.N. Kolosov, 1982 †
Genus Urasphaera M. Nagovitsin & K.E. Moczydłowska, 2012 †
Genus Vadaszia F. Góczán, 1997 †
Genus Valeria T.V. Jankauskas, 1982 †
Genus Valvimorpha Yan, 1985 †
Genus Vandalosphaeridium Vidal, 1981 †
Genus Vanguestainidium Steemans, Javaux, Breuer, Le Hérissé, Marshall & De Ville De Goyet, 2009 †
Genus Variolidium R.E. Turner, 1991 †
Genus Variomargosphaeridium Zang & Walter, 1992 †
Genus Vavososphaeridium B.V. Timofeev, 1959 †
Genus Vavosphaeridium † accepted as Vavososphaeridium B.V. Timofeev, 1959 †
Genus Vavrdovella A.R. Loeblich Jr. & H. Tappan, 1976 † accepted as Tetraniveum Vavrdová, 1976 †
Genus Velatasphaera Miller & Williams, 1988 †
Genus Velifentes I.M. Brito, 1967 † accepted as Veliferites I.M. Brito, 1967 †
Genus Veliferites I.M. Brito, 1966 † accepted as Veliferites I.M. Brito, 1967 †
Genus Veliferites I.M. Brito, 1967 †
Genus Ventilabrumorpha F. Wang, G. Zhou & Q. Chen, 1980 †
Genus Vermiculatisphaera M.A. Miller & L.E. Eames, 1982 †
Genus Verrucidium D. Habib & S.D. Knapp, 1982 †
Genus Verrucosphaera H. Górka, 1970 †
Genus Verrucosphaera P. Liu & M. Moczydłowska, 2019 † accepted as Spinomargosphaera X. Shang & P. Liu, 2024 †
Genus Veryhachium J. Deunff, 1954 †
Genus Vesiculosphaera A.S. Lopuchin in Neustadt, 1966 †
Genus Vesiculosphaera I.A. Siverzeva & N.A. Volkova in Volkova & Siverzeva, 1991 †
Genus Vesiculosphaerina A.S. Lopukhin, 1966 †
Genus Vidalia K. Grey, 2005 †
Genus Villosacapsula A.R. Loeblich Jr. & H. Tappan, 1976 †
Genus Virgatasporites A. Combaz, 1968 †
Genus Visbysphaera T.R. Lister, 1970 †
Genus Vogtlandia G. Burmann, 1970 †
Genus Volkovia C. Downie, 1982 †
Genus Vologdovia Shepeleva in Klevtsova & Shepeleva, 1980 †
Genus Vulcanisphaera J. Deunff, 1961 †
Genus Waaslandia S. De Schepper, M.J. Head & S. Louwye, 2004 †
Genus Weissiella N.G. Vorob'eva, V.N. Sergeev & A.H. Knoll, 2009 †
Genus Wicanderidium W.A.S. Sarjeant & Vavrdová, 1997 †
Genus Wilsonastrum Jansonius, 1962 †
Genus Winwaloeusia J. Deunff, 1977 †
Genus Wrensnestia K.J. Dorning, 1981 †
Genus Wuhanshania †
Genus Wujiangella Li, Chen, Lipps, Gao, Chi & Wu, 2007 †
Genus Wumishania †
Genus Wuroia L.E. Stover & R. Helby, 1987 †
Genus Xanthocysta R.L. Ravn & D.K. Goodman, 2017 †
Genus Xueia S. Ying, 2000 †
Genus Yalisphaeridium L. Gao, 1986 †
Genus Yichangia L.M. Yin, 1987 †
Genus Yinia N. Wang, 1989 †
Genus Yonyangella Li, Chen, Lipps, Gao, Chi & Wu, 2007 †
Genus Yurtusia L. Dong, S. Xiao, B. Shen, C. Zhou, G. Li & J. Yao, 2009 †
Genus Yushengia P. Liu, S. Xiao, C. Yin, S. Chen, C. Zhou & M. Li, 2014 †
Genus Zhangbalingella Yang & Wang in Wang & Yang, 1995 †
Genus Zonoleiosphaeridium A.M. Medvedeva in Medvedeva & Aksjonova, 1976 †
Genus Zonooidium B.V. Timofeev, 1957 †
Genus Zonophycus Q. Luo & F. Wang in Wang & Luo, 1984 †
Genus Zonosphaeridium B.V. Timofeev ex B.V. Timofeev, 1973 †
Genus Zonotriporina Teteriuk, 1958 † accepted as Triporina S.N. Naumova, 1939 †
Phylum Algae (awaiting allocation)
Phylum Algae incertae sedis
Phylum Anthocerotophyta
Phylum Bryophyta
Phylum Calcitarcha †
Phylum Charophyta
Phylum Chlorophyta
Phylum Eophyta †
Phylum Glaucophyta
Phylum Gymnospermophyta accepted as Tracheophyta
Phylum Horneophyta †
Phylum Magnoliophyta accepted as Tracheophyta
Phylum Marchantiophyta
Phylum Picozoa
Phylum Plantae (awaiting allocation)
Phylum Prasinodermatophyta
Phylum Pteridophyta accepted as Tracheophyta
Phylum Rhodelphidia
Phylum Rhodophyta
Phylum Sporae dispersae †
Phylum Tracheophyta
Phylum Vendophyta † accepted as Algae incertae sedis
Class Nematophyceae † accepted as Nematophyta †
Kingdom Protista accepted as Protozoa
Kingdom Protozoa
Kingdom Viruses