IRMNG Taxon list
Aalenirhynchia Shi & Grant, 1993 †
Aberia Melou, 1990 †
Aboriginella Koneva in Koneva & Popov, 1983 †
Abramovia Baranov in Alekseeva, Sidjachenko, Baranov, Afanaseva, Grunt, Komarov, Lazarev & Manankov, 1996 †
Abramovispirifer Baranov & Alkhovik, 2005 †
Abrekia Dagis, 1974 †
Absenticosta Lazarev, 1991 †
Abyssorhynchia Zezina, 1980
Abyssorhynchia craneana (Dall, 1895)
Abyssothyris Thomson, 1927
Abyssothyris atlantica Cooper, 1977 accepted as Abyssothyris wyvillei (Davidson, 1878)
Abyssothyris elongata Cooper, 1972 accepted as Abyssothyris wyvillei (Davidson, 1878)
Abyssothyris parva Cooper, 1977 accepted as Abyssothyris wyvillei (Davidson, 1878)
Abyssothyris wyvillei (Davidson, 1878)
Acambona White, 1862 †
Acanthalosia Waterhouse, 1986 †
Acanthambonia Cooper, 1956 †
Acanthatia Muir-Wood & Cooper, 1960 †
Acanthatreta Streng, 1999 †
Acanthobasiliola Zezina, 1981
Acanthobasiliola doederleini (Davidson, 1886)
Acanthocosta Roberts, 1971 †
Acanthocrania Williams, 1943 †
Acanthoglypha Williams & Curry, 1985 †
Acanthoplecta Muir-Wood & Cooper, 1960 †
Acanthoproductus Martynova, 1970 †
Acanthorhynchia Buckman, 1914 † accepted as Acanthorhynchia Buckman, 1917 †
Acanthorhynchia Buckman, 1917 †
Acanthorthis Neuman, 1976 †
Acanthospira Weller, 1914 † accepted as Acanthospirina Schuchert & Le Vene, 1929 †
Acanthospirifer Menakova, 1964 †
Acanthospirina Schuchert & Le Vene, 1929 †
Acanthothirididae †
Acanthothiris d'Orbigny, 1850 †
Acanthothiris spinosa Linnaeus, 1788 †
Acanthothyris Bronn, 1862 † accepted as Acanthothiris d'Orbigny, 1850 † [Family: Acanthothirididae]
Acanthothyris Paetel, 1875 † accepted as Acanthothiris d'Orbigny, 1850 † [Family: Rhynchonellidae]
Acanthothyropsis Kamyshan in Kamyshan & Babanova, 1973 †
Acanthotnyropsis Kamyshan in Kamyshan & Babanova, 1973 † accepted as Acanthothyropsis Kamyshan in Kamyshan & Babanova, 1973 †
Acanthotoechia Williams & Curry, 1985 †
Acanthotretella Holmer & Caron, 2006 †
Acareorthis Roberts in Roberts & Jell, 1990 †
Acareothoris † (uncertain )
Acareothoris jelli Roberts, 1990 †
Acaretyrricula Jin & Chatterton, 1997 †
Acculina Misyus in Misyus & Ushatinskaya, 1977 †
Achunoproductus Ustritsky, 1971 †
Acidotocarena Liu, 1979 † (uncertain )
Acolosia Cooper & Grant, 1976 †
Acosarina Cooper & Grant, 1969 †
Acosarina minuta (Abich) †
Acrites Davidson & King, 1874 † accepted as Aulonotreta Kutorga, 1848 †
Acritis Volborth, 1869 † accepted as Aulonotreta Kutorga, 1848 †
Acritosia Cooper & Grant, 1969 †
Acrobelesia Cooper, 1983 †
Acrobelesia cooperi (d'Hondt, 1976) †
Acrobrochus Cooper, 1983
Acrobrochus blochmanni (Jackson, 1912)
Acrobrochus hendleri (Cooper, 1982) accepted as Acrobrochus vema (Cooper, 1973)
Acrobrochus landonensis (Thomson, 1918)
Acrobrochus marotiroensis Bitner, 2007
Acrobrochus vema (Cooper, 1973)
Acrocretidae † accepted as Acrotretidae Schuchert, 1893 †
Acrosaccidae Willard, 1928 accepted as Discinidae Gray, 1840
Acrosaccus Willard, 1928 † accepted as Schizotreta Kutorga, 1848 †
Acrospirifer Helmbrecht & Wedekind, 1923 †
Acrospirifer Wedekind in Salamon, 1926 †
Acrospirifer concinnus †
Acrospirifer murchisoni †
Acrospiriferidae †
Acrothele Linnarsson, 1876 †
Acrothele asiatica Endo & Resser †
Acrothele brevis Chapman, 1917 †
Acrothele colleni Walcott, 1912 †
Acrothele matthewi †
Acrothele spurri † accepted as Eothele spurri †
Acrothele subquadrata Chapman, 1917 †
Acrothelidae Schuchert, 1893 †
Acrothyra Matthew, 1901 †
Acrothyris Hou, 1963 †
Acrotreta Kutorga, 1848 †
Acrotreta antipodum Chapman, 1918 †
Acrotreta bellatula Walcott, 1908 †
Acrotreta definita Walcott, 1902 †
Acrotreta pileata Endo & Resser †
Acrotreta sabinae †
Acrotretella Ireland, 1961 †
Acrotretida †
Acrotretida (awaiting allocation) (temporary name )
Acrotretidae Schuchert, 1893 †
Actinoconchus M'Coy in Griffith, 1842 † accepted as Actinoconchus M'Coy, 1844 †
Actinoconchus M'Coy, 1844 †
Actinoconchus planosulcata (Phillips, 1836) †
Actinomena Öpik, 1930 †
Actinomya Carus in Carus & Gerstaecker, 1875 † accepted as Antinomia Catullo, 1851 †
Aculopileus Kerber, 1988 † (uncertain )
Acuminothyris Roberts, 1963 †
Acutatheca Stainbrook, 1945 †
Acutella Lyashenko, 1973 †
Acutilineolus † accepted as Acutilineotus Amsden, 1978 †