Acanthochonia Hinde, 1884 † accepted as Ischadites R.I. Murchison, 1839 † (source of synonymy)
Acanthochonia Hinde, 1884 † accepted as Ischadites R.I. Murchison, 1839 † (verified source for family)
Aclistochara R.E. Peck, 1937 † (extant flag source)
Aclistocharaceae † accepted as Characeae Agardh, 1824 (extant flag source)
Amblyochara L. Grambast, 1963 † (extant flag source)
Amphispongia Salter, 1861 † (extant flag source)
Amphispongia Salter, 1861 † (basis of record)
Anomaloides E.O. Ulrich in Mickelborough & Wetherby, 1878 † (basis of record)
Anomaloides E.O. Ulrich in Mickelborough & Wetherby, 1878 † (verified source for family)
Apidium E. Stolley, 1896 † (extant flag source)
Apidium E. Stolley, 1896 † (basis of record)
Aquadulcum R. Harland & W.A.S. Sarjeant, 1970 † accepted as Cobricosphaeridium R. Harland & W.A.S. Sarjeant, 1970 † (habitat flag source)
Carnegia Pantocsek, 1912 † (extant flag source)
Catena V.P. Maslov, 1956 † accepted as Wetheredella Wood, 1948 † (basis of record)
Cayeuxia M.M. Frollo, 1938 † (habitat flag source)
Cayeuxia M.M. Frollo, 1938 † (extant flag source)
Cayeuxia americana J.H. Johnson † (extant flag source)
Cayeuxia americana J.H. Johnson † (habitat flag source)
Cayeuxia anae O. Dragastan † (habitat flag source)
Cayeuxia anae O. Dragastan † (extant flag source)
Cayeuxia atanasiui O. Dragastan † (extant flag source)
Cayeuxia atanasiui O. Dragastan † (habitat flag source)
Cayeuxia elliottii O. Dragastan † (habitat flag source)
Cayeuxia elliottii O. Dragastan † (extant flag source)
Cayeuxia fruticulosa J.H. Johnson & H.V. Kaska † (extant flag source)
Cayeuxia fruticulosa J.H. Johnson & H.V. Kaska † (habitat flag source)
Cayeuxia kurdistanensis G.F. Elliott † (habitat flag source)
Cayeuxia kurdistanensis G.F. Elliott † (extant flag source)
Cayeuxia lemaitrae O. Dragastan † (extant flag source)
Cayeuxia lemaitrae O. Dragastan † (habitat flag source)
Cayeuxia mediterranea M. Herak † (habitat flag source)
Cayeuxia mediterranea M. Herak † (extant flag source)
Cayeuxia nodosa F.W. Anderson † (extant flag source)
Cayeuxia nodosa F.W. Anderson † (habitat flag source)
Cayeuxia piae M.M. Frollo † (habitat flag source)
Cayeuxia piae M.M. Frollo † (extant flag source)
Ceratolithus cristatus Kamptner, 1950 (extant flag source)
Cerionites F.B. Meek & A.H. Worthen, 1868 † accepted as Cyclocrinites C.E.I. von Eichwald, 1840 † (source of synonymy)
Cerionites F.B. Meek & A.H. Worthen, 1868 † accepted as Cyclocrinites C.E.I. von Eichwald, 1840 † (basis of record)
Characeae Agardh, 1824 (habitat flag source)
Characiaceae (extant flag source)
Characiaceae (habitat flag source)
Charina N. Filarszky & G.O. Allen ex N. Filarszky, 1937 accepted as Nitella C.A. Agardh, 1824 (source of synonymy)
Charites H. Horn af Rantzien, 1959 † (source of synonymy)
Charites H. Horn af Rantzien, 1959 † (extant flag source)
Charophyceae (awaiting allocation) (extant flag source)
Chlamydomonadales (awaiting allocation) (habitat flag source)
Chrysostomataceae † (extant flag source)
Chrysostomataceae † (habitat flag source)
Coeloceratioides Derville, 1931 † accepted as Koninckopora G.W. Lee, 1912 † (verified source for family)
Coeloceratioides Derville, 1931 † accepted as Koninckopora G.W. Lee, 1912 † (name verified source)
Coeloceratioides Derville, 1931 † accepted as Koninckopora G.W. Lee, 1912 † (extant flag source)
Coeloceratioides Derville, 1931 † accepted as Koninckopora G.W. Lee, 1912 † (source of synonymy)
Coeloceratioides Derville, 1931 † accepted as Koninckopora G.W. Lee, 1912 † (basis of record)
Coelosphaeridium F. Roemer, 1885 † (extant flag source)
Coelosphaeridium F. Roemer, 1885 † (basis of record)
Creberlumectum R. Harland & W.A.S. Sarjeant, 1970 † (habitat flag source)
Croftiella H. Horn af Rantzien, 1959 † (extant flag source)
Croftiella H. Horn af Rantzien, 1959 † (source of synonymy)
Cyclocrinites C.E.I. von Eichwald, 1840 † (verified source for family)
Cyclocrinites C.E.I. von Eichwald, 1840 † (extant flag source)
Cyclocrinites C.E.I. von Eichwald, 1840 † (basis of record)
Cyclocrinus C.E.I. von Eichwald, 1860 † accepted as Cyclocrinites C.E.I. von Eichwald, 1840 † (source of synonymy)
Cyclocrinus C.E.I. von Eichwald, 1860 † accepted as Cyclocrinites C.E.I. von Eichwald, 1840 † (basis of record)
Diacrocanthidium G. Deflandre & J.-C. Foucher, 1967 † (habitat flag source)
Dictyocha fibula Ehrenberg, 1839 (extant flag source)
Dictyocha navicula Ehrenberg (extant flag source)
Discoaster planctonicus Lecal, 1952 accepted as Rhabdothorax gerenus Kamptner, 1967 accepted as Scrippsiella regalis (K.R. Gaarder) D. Janofske, 2000 (additional source)
Ehlersospongia Fagerstrom, 1961 † (verified source for family)
Epimastopora J. von Pia, 1937 † (basis of record)
Epimastopora J. von Pia, 1937 † (verified source for family)
Globuliferoporella B.I. Tchuvashov, 1974 † (verified source for family)
Globuliferoporella B.I. Tchuvashov, 1974 † (basis of record)
Gobichara J. Karczewska & M. Ziembinska-Tworzydlo, 1972 † (extant flag source)
Grambastichara H. Horn af Rantzien, 1959 † (extant flag source)
Grambastichara H. Horn af Rantzien, 1959 † (source of synonymy)
Grovesichara H. Horn af Rantzien, 1959 † (extant flag source)
Gyrogona Lamarck ex Lamarck, 1822 † accepted as Gyrogonites J.B. de Lamarck ex J.B. de Lamarck, 1822 † (extant flag source)
Halymeniales (awaiting allocation) (habitat flag source)
Hannaites Y.J. Mandra, 1969 † (extant flag source)
Harrisichara L. Grambast, 1957 † (extant flag source)
Ischadites R.I. Murchison, 1839 † (extant flag source)
Ischadites R.I. Murchison, 1839 † (habitat flag source)
Karpinskyaceae Wang & Lu, 1980 † accepted as Trochiliscaceae Karpinsky in Peck, 1934 † (extant flag source)
Koninckopora G.W. Lee, 1912 † (basis of record)
Koninckoporoides M. Rich, 1974 † (basis of record)
Koninckoporoides M. Rich, 1974 † (verified source for family)
Lamprothamnus A. Braun, 1882 accepted as Lamprothamnium J. Groves, 1916 (source of synonymy)
Leiosphaeridaceae Timofeev, 1956 † (basis of record)
Maedleriella L. Grambast, 1957 † (extant flag source)
Maedlerisphaera H. Horn af Rantzien, 1959 † (source of synonymy)
Maedlerisphaera H. Horn af Rantzien, 1959 † (extant flag source)
Mastopora C.E.I. von Eichwald, 1840 † (basis of record)
Mesocenaceae T.V. Desikachary & P. Prema, 1996 † accepted as Dictyochaceae Wallich, 1865 (extant flag source)
Mesochara L. Grambast, 1963 † (extant flag source)
Microchara L. Grambast, 1960 † (extant flag source)
Muiradinium R. Harland & W.A.S. Sarjeant, 1970 † (habitat flag source)
Nemegtichara J. Karczewska & M. Ziembinska-Tworzydlo, 1972 † (extant flag source)
Nodosochara K. Mädler, 1955 † (extant flag source)
Obtusochara K. Mädler, 1952 † (extant flag source)