Abakana Morozova, 1961 † (basis of record)
Abakana macrospina (Schoenmann, 1926) † (basis of record)
Abdomenopora Voigt, 1995 † (basis of record)
Abdomenopora schumacheri Voigt, 1995 † (basis of record)
Acanthobaktron Voigt, 1999 † (basis of record)
Acanthobaktron spinosum Voigt, 1999 † (basis of record)
Acanthoceramoporella Utgaard, 1968 † (basis of record)
Acanthoceramoporella brestica Pushkin, 2002 † (basis of record)
Acanthoceramoporella crassimuralis (Bassler, 1911) † accepted as Anolotichiina crassimuralis (Bassler, 1911) † (basis of record)
Acanthoceramoporella granulosa (Ulrich, 1890) † (basis of record)
Acanthoceramoporella granulosa minor (Bassler, 1911) † (basis of record)
Acanthoceramoporella spinigera Ernst & Munnecke, 2009 † (basis of record)
Acanthoceramoporella triloba (Cumings & Galloway, 1913) † (basis of record)
Acanthoceramoporella valliensis Karklins, 1984 † (basis of record)
Acanthoceramoporellidae Pushkin, 2002 † (basis of record)
Acanthocladia King, 1849 † (basis of record)
Acanthocladia anceps (Schlotheim, 1820) † (basis of record)
Acanthocladia anceps laxa Korn, 1930 † (basis of record)
Acanthocladia antiqua Nekhoroshev, 1956 † (basis of record)
Acanthocladia biserialis Chronic, 1949 † (basis of record)
Acanthocladia ciscoensis Moore, 1929 † (basis of record)
Acanthocladia ciscoensis granulosa Moore, 1929 † (basis of record)
Acanthocladia ciscoensis irregularis Moore, 1929 † (basis of record)
Acanthocladia crebriramosa Trizna, 1939 † (basis of record)
Acanthocladia fruticosa Ulrich, 1890 † (basis of record)
Acanthocladia guadalupensis Girty, 1908 † (basis of record)
Acanthocladia macer Trizna, 1950 † (basis of record)
Acanthocladia minor Korn, 1930 † (basis of record)
Acanthocladia morozovae Popeko, 1967 † (basis of record)
Acanthocladia multipora Fritz, 1932 † (basis of record)
Acanthocladia ouachitensis Harlton, 1933 † (basis of record)
Acanthocladia pampinosa Trizna, 1950 † (basis of record)
Acanthocladia peculiaris Sakagami, 1962 † accepted as Arborocladia peculiaris (Sakagami, 1962) † (basis of record)
Acanthocladia pinnata Rogers, 1900 † (basis of record)
Acanthocladia rectangulata Xia & Liu, 1986 † (basis of record)
Acanthocladia rectifurcata Bassler, 1929 † (basis of record)
Acanthocladia regularis Bassler, 1929 † (basis of record)
Acanthocladia rhombicellata Shulga-Nesterenko, 1955 † (basis of record)
Acanthocladia robusta Yang & Lu, 1962 † (basis of record)
Acanthocladia simplex Moore, 1929 † (basis of record)
Acanthocladia sparsifurcata Shulga-Nesterenko, 1941 † (basis of record)
Acanthocladia sparsifurcata tenuis Nikiforova, 1938 † (basis of record)
Acanthocladia striata Bolkhowitinova & Markoff, 1926 † (basis of record)
Acanthocladia thaiensis Sakagami, 1968 † (basis of record)
Acanthocladia tumulosa Morozova, 1970 † (basis of record)
Acanthocladia tundrica Kruchinina, 1986 † (basis of record)
Acanthocladiidae Ulrich, 1890 † (basis of record)
Acanthoclema alternatum (Hall, 1883) † (basis of record)
Acanthoclema asperum (Hall, 1852) † (basis of record)
Acanthoclema confluens (Ulrich, 1888) † (basis of record)
Acanthoclema distilum Bigey, 1988 † (basis of record)
Acanthoclema divergens Hall & Simpson, 1887 † (basis of record)
Acanthoclema irregularis Ernst, 2011 † (basis of record)
Acanthoclema junggarensis Xia, 1997 † (basis of record)
Acanthoclema lineatum McNair, 1937 † (basis of record)
Acanthoclema ohioense McNair, 1937 † (basis of record)
Acanthoclema ovatum Hall & Simpson, 1887 † (basis of record)
Acanthoclema parva Ernst, 2011 † (basis of record)
Acanthoclema parvula Ernst, Dorsch & Keller, 2011 † (basis of record)
Acanthoclema sulcatum Hall & Simpson, 1887 † (basis of record)
Acanthoclema triangularis Ernst & Königshof, 2010 † (basis of record)
Acanthoclema triseriale (Hall, 1883) † (basis of record)
Acanthodesia variegata Di Martino & Taylor, 2018 † (basis of record)
Acantholaminatus Marintsch, 1998 † (basis of record)
Acantholaminatus multistylus Marintsch, 1998 † (basis of record)
Acantholaminatus typicus Marintsch, 1998 † (basis of record)
Acantholunaria Ernst, Munneke & Oswald, 2015 † (basis of record)
Acantholunaria expansa Ernst, Munneke & Oswald, 2015 † (basis of record)
Acanthopora d'Orbigny, 1849 † (basis of record)
Acanthopora formosa Canu & Bassler, 1926 † (basis of record)
Acanthopora haimei Etallon, 1859 † (basis of record)
Acanthopora icaunensis d'Orbigny, 1850 † (basis of record)
Acanthopora lamourouxi Haime, 1854 † (basis of record)
Acanthopora neocomiensis d'Orbigny, 1850 † (basis of record)
Acanthopora pulchella de Loriol, 1868 † (basis of record)
Acanthopora spinosa (Lamouroux, 1821) † accepted as Neuropora spinosa (Lamouroux, 1821) † (basis of record)
Acanthoporella Davis, 1934 † (basis of record)
Acanthoporella triangularis (Canu & Bassler, 1923) † (basis of record)
Acanthoporidra Davis, 1934 † (basis of record)
Acanthoporidra angusta (Ulrich, 1901) † (basis of record)
Acanthostega (basis of record)
Acanthostictoporella Ernst, 2010 † (basis of record)
Acanthostictoporella angusta Ernst & Königshof, 2010 † (basis of record)
Acanthostictoporella modesta Ernst, 2011 † (basis of record)
Acanthotrypa Vinassa de Regny, 1915 † (basis of record)
Acanthotrypa carnica Vinassa de Regny, 1915? † (basis of record)
Acanthotrypina Vinassa de Regny, 1915 † (basis of record)
Acanthotrypina spinulifera (Bassler, 1906) † (basis of record)
Acerinucleus Brown, 1958 † (basis of record)
Acerinucleus incudiferus (Maplestone, 1902) † (basis of record)
Acoscinopleura Voigt, 1956 † (basis of record)
Acoscinopleura albaruthenica Koromyslova, Martha & Pakhnevich, 2018 † (basis of record)
Acoscinopleura artemis (d'Orbigny, 1851) † (basis of record)
Acoscinopleura clio (d'Orbigny, 1851) † (basis of record)
Acoscinopleura crassa Koromyslova, Martha & Pakhnevich, 2018 † (basis of record)
Acoscinopleura dualis Koromyslova, Martha & Pakhnevich, 2018 † (basis of record)
Acoscinopleura fallax Voigt, 1956 † (basis of record)
Acoscinopleura foliacea (Voigt, 1930) † (basis of record)
Acoscinopleura occulta Koromyslova, Martha & Pakhnevich, 2018 † (basis of record)
Acoscinopleura rimosa Voigt, 1956 † (basis of record)