• Abelleicidaris borjnadorensis Vadet, Marignac, Nicolleau & Reboul, 2007 †: Berriasian
• Absurdaster hungaricus Kroh, Lukeneder & Gallemí, 2014 †: Hauterivian
• Absurdaster meriani (Ooster, 1865) †: Cretaceous, Lower
• Absurdaster puezensis Kroh, Lukeneder & Gallemí, 2014 †: Barremian
• Absurdaster puezensis Kroh, Lukeneder & Gallemí, 2014 †: Hauterivian
• Abyssomelania campbellae Kaim, R. G. Jenkins, Tanabe & Kiel, 2014 †: Albian
• Acanthopora formosa Canu & Bassler, 1926 †: Valanginian
• Acanthopora icaunensis d'Orbigny, 1850 †: Hauterivian
• Acanthopora icaunensis d'Orbigny, 1850 †: Valanginian
• Acanthopora neocomiensis d'Orbigny, 1850 †: Hauterivian
• Acanthopora neocomiensis d'Orbigny, 1850 †: Valanginian
• Acanthopora pulchella de Loriol, 1868 †: Hauterivian
• Acanthopora pulchella de Loriol, 1868 †: Valanginian
• Acharax stantoni (H. E. Vokes, 1955) †: Albian
• Acharax stantoni (H. E. Vokes, 1955) †: Barremian
• Acharax stantoni (H. E. Vokes, 1955) †: Valanginian
• Acriaster sergipensis Smith in Smith & Benggtson, 1991 †: Albian
• Acrocidaris arginensis Weber, 1934 †: Hauterivian
• Acrocidaris marocense Vadet, Marignac, Nicolleau & Reboul, 2007 †: Berriasian
• Acropeltis atlantica Rey, Taj-Eddine & Witam, 1989 †: Valanginian
• Acropeltis atlantica Rey, Taj-Eddine & Witam, 1989 †: Berriasian
• Acteon marullensis A. d'Orbigny, 1850 †: Hauterivian
• Acteonella fusiformis Coquand, 1865 †: Aptian
• Acteonella sublaevis Briart & Cornet, 1868 †: Albian
• Actinopora campicheana (d'Orbigny, 1853) †: Valanginian
• Ageria angustata (A. d'Orbigny, 1850) †: Hauterivian
• Albianopalin benkeari Hamilton-Bruce, B. J. Smith & Gowlett-Holmes, 2002 †: Albian
• Albianopalin lizsmithae Hamilton-Bruce, B. J. Smith & Gowlett-Holmes, 2002 †: Albian
• Amanocina raukumara Kiel, 2013 †: Albian
• Amanocina raukumara Kiel, 2013 †: Aptian
• Amberleya morganensis (Stanton, 1895) †: Valanginian
• Ammobaculites korangaensis Stoneley, 1962 †: Cretaceous, Lower
• Ammobaculites taitaiica Stoneley, 1962 †: Cretaceous, Lower
• Amnicola chaoyangensis X.-H. Yu, 1987 †: Aptian
• Amnicola gibbula X.-H. Yu, 1982 †: Albian
• Amnicola meikiensis W. Yü, 1980 †: Albian
• Amnicola meikiensis W. Yü, 1980 †: Aptian
• Amnicola minuta X.-H. Yu, 1982 †: Albian
• Amnicola opima X.-H. Yu, 1982 †: Albian
• Amnicola subrotunda X.-H. Yu, 1982 †: Albian
• Amnicola yumenensis F. Guo, 1982 †: Aptian
• Amnicola yumenensis F. Guo, 1982 †: Barremian
• Amplovalvata magna H.-Z. Pan, 1980 †: Cretaceous, Lower
• Amplovalvata valareslebensis Huckriede, 1967 †: Berriasian
• Ampullina dupinii (Leymerie, 1842) †: Albian
• Ampullina ervyna (A. d'Orbigny, 1842) †: Albian
• Ampullina rauliniana (A. d'Orbigny, 1842) †: Albian
• Ancyloceras matheronianum A. d'Orbigny, 1842 †: Aptian
• Anditrigonia subnodosa Levy, 1967 †: Cretaceous, Lower
• Anodonta becklesi R. B. Newton, 1910 †: Valanginian
• Anomalina clarentica Stoneley, 1962 †: Cretaceous, Lower
• Anomalina hectori Stoneley, 1962 †: Cretaceous, Lower
• Anomalina macphersoni Stoneley, 1962 †: Cretaceous, Lower
• Anomalinoides finlayi Stoneley, 1962 †: Cretaceous, Lower
• Anorthopygus texanus Cooke, 1946 †: Cretaceous, Lower
• Anthonya jarai Lazo & S. E. Damborenea, 2011 †: Barremian
• Anunio ananjevi Lebedev, 1958 †: Albian
• Aphelaster serotinus Tanaka & Shibata, 1961 †: Cretaceous, Lower
• Aplexa fuxinensis X.-H. Yu, 1987 †: Albian
• Aplexa kasekikabe Isaji, 2010 †: Hauterivian
• Aplexa kasekikabe Isaji, 2010 †: Valanginian
• Aplexa militaria Yen & Reeside, 1946 †: Albian
• Aplexa militaria Yen & Reeside, 1946 †: Aptian
• Aplexa morrisonana Yen & Reeside, 1946 †: Albian
• Aplexa morrisonana Yen & Reeside, 1946 †: Aptian
• Aplexa morrisoni MacNeil, 1939 †: Albian
• Aplexa morrisoni MacNeil, 1939 †: Aptian
• Aplexa morrisoni MacNeil, 1939 †: Barremian
• Aplexa morrisoni MacNeil, 1939 †: Hauterivian
• Aplexa morrisoni MacNeil, 1939 †: Valanginian
• Aplexa morrisoni MacNeil, 1939 †: Berriasian
• Apsendesia neocomiensis d'Orbigny, 1850 †: Aptian
• Arabitrigonia pillayi M. R. Cooper, 2016 †: Albian
• Araripenaia elliptica V. R. Silva et al., 2020 †: Aptian
• Archaeounio kagaensis Koarai & Matsukawa, 2016 †: Valanginian
• Archaeounio kagaensis Koarai & Matsukawa, 2016 †: Berriasian
• Ariecornibus schweitzerae Franţescu, 2014 †: Albian
• Arnaudaster colombianus Cooke, 1955 †: Albian
• Ascheria eucosmeta (Ascher, 1906) †: Cretaceous, Lower
• Astele gurgitis (Brongniart, 1822) †: Albian
• Ataphrus albensis (A. d'Orbigny, 1842) †: Hauterivian
• Aucellina euglypha H. Woods, 1917 †: Albian
• Aucellina euglypha H. Woods, 1917 †: Aptian
• Aucellina radiatostriata Bonarelli, 1921 †: Albian
• Auristoma binggouensis X.-H. Yu, 1987 †: Albian
• Auristoma subovata X.-H. Yu, 1987 †: Albian
• Auristoma xishanensis Q.-S. Shan, 1994 †: Albian
• Auristoma xishanensis Q.-S. Shan, 1994 †: Aptian
• Australidiadema alexanderi Smith & Crame, 2012 †: Aptian
• Austromyophorella dooleyi M. R. Cooper, 2011 †: Barremian
• Austrotrigonia prima Skwarko, 1963 †: Cretaceous, Lower
• Austrotrigonia secunda Skwarko, 1968 †: Cretaceous, Lower
• Avellana dupiniana A. d'Orbigny, 1842 †: Albian
• Avellana hugardiana A. d'Orbigny, 1842 †: Albian
• Avellana intermedia Kollmann, 1976 †: Albian
• Avellana subincrassata A. d'Orbigny, 1850 †: Albian
• Baicalia gobiensis Martinson, 1971 †: Albian
• Baicalia hulsyniana Martinson, 1971 †: Albian
• Balanocidaris clubis Aziz, 1991 †: Albian
• Balanocidaris clubis Aziz, 1991 †: Aptian