• Aahithis erraticus (Schallreuter, 1985) †: direct development
• Aahithis vanspronsenae Schallreuter, 1988 †: direct development
• Aaleniella (Aaleniella) compressa Plumhoff, 1963 †: direct development
• Aaleniella (Danocythere) gracilis Christensen & Kilenyi, 1970 †: direct development
• Aaleniella (Danocythere) inornata (Kilenyi, 1969) †: direct development
• Aaleniella cuneata Wakefield, 1994 †: direct development
• Aaleniella franzi Tesakova, E. M. †: direct development
• Aaleniella reticulata Knitter, 1983 †: direct development
• Aaleniella volganica Tesakova, E. M. †: direct development
• Abditacythere subterranea Hartmann, 1964: direct development
• Abditoloculina filaloculina Tillman & Murphy, 1978 †: direct development
• Aberroconcha plicata Adamczak, 1961 †: direct development
• Abeskunus brusinianus (Clessin & W. Dybowski, 1887): direct development
• Abeskunus depressispira (Logvinenko & Starobogatov, 1969): direct development
• Abeskunus exiguus (Eichwald, 1838): direct development
• Aboilia blessi Becker & Adamczak, 1993 †: direct development
• Abortivelum truncatum Berdan & Copeland, 1973 †: direct development
• Abrekopsis depressispirus (Batten & Stokes, 1986) †: direct development
• Abrocythereis feishania Hu & Tao, 2008: direct development
• Abrocythereis guangdongensis Gou in Gou, Zheng & Huang, 1983 †: direct development
• Abrocythereis jyhemouia Hu & Tao, 2008: direct development
• Abrocythereis keyi (Kingma, 1948) †: direct development
• Abrocythereis malaysiana Malz & Tabuki, 1988: direct development
• Abrocythereis punctata (Hu, 1986) †: direct development
• Abrocythereis ryukyuensis Malz & Tabuki, 1988 †: direct development
• Abrocythereis taiwanica Malz & Tabuki, 1988 †: direct development
• Abrocythereis tungyei Hu & Tao, 2008 †: direct development
• Absonocytheropteron carinatum Puri, 1957 †: direct development
• Absonocytheropteron watervalleyense Krutak, 1961 †: direct development
• Abyssobairdia anisovalva Coles & Whatley, 1989 †: direct development
• Abyssobythere guttata Ayress & Whatley, 1989 †: direct development
• Abyssobythere inequivalva Ayress, Correge, Passlow & Whatley, 1996: direct development
• Abyssocypris (Abyssocypris) tipica Bold, 1974 †: direct development
• Abyssocypris abyssophilia (Maddocks, 1969): direct development
• Abyssocypris adunca (Esker, 1968) †: direct development
• Abyssocypris atlantica (Maddocks, 1977): direct development
• Abyssocypris boldi Colin, 1987 †: direct development
• Abyssocypris palavensis Pokorny, 1979 †: direct development
• Abyssocypris tipica Bold, 1974 †: direct development
• Abyssocythere atlantica Benson, 1971: direct development
• Abyssocythere australis Benson, 1971: direct development
• Abyssocythere bensoni Brandão, Stuhlmann, Vital & Brandt, 2016: direct development
• Abyssocythere bilobata Colin, 1987 †: direct development
• Abyssocythere braziliensis Benson, 1983: direct development
• Abyssocythere carpathica Pokorny, 1975 †: direct development
• Abyssocythere casca Benson, 1971: direct development
• Abyssocythere contramaestrensis (Lübimova & Sanchez, 1974) †: direct development
• Abyssocythere diagrenona (Guernet, 1985) †: direct development
• Abyssocythere japonica Benson, 1971: direct development
• Abyssocythere pannucea Benson, 1971: direct development
• Abyssocythere paratrinidadensis Boomer, 1999 †: direct development
• Abyssocythere regalis Zhao, 1988: direct development
• Abyssocythere scotti Yasuhara, Hunt, Okahashi & Brandão, 2015 †: direct development
• Abyssocythereis sulcatoperforata (Brady, 1880): direct development
• Abyssocythereis vitjasi Schornikov, 1975: direct development
• Abyssonemertes kajiharai Chernyshev & Polyakova, 2017: direct development
• Abyssophilos ktis Jellinek & Swanson, 2003: direct development
• Acandona admiratio Karanovic, 2003: direct development
• Acandona admirato Karanovic, 2003: direct development
• Acandona memoria Karanovic, 2003: direct development
• Acanthobolbina loeblichi Harris, 1957 †: direct development
• Acanthocythere (Unodentina) undata Malz, 1958 †: direct development
• Acanthocythere aardaensis Basha, 1980 †: direct development
• Acanthocythereis agapensis Lev, 1983: direct development
• Acanthocythereis alacris Al-Furaih, 1980 †: direct development
• Acanthocythereis araneosa Howe, 1963 †: direct development
• Acanthocythereis ascolii (Puri, 1963) †: direct development
• Acanthocythereis colini Sciuto, 2014 †: direct development
• Acanthocythereis conjuncta Al-Furaih, 1980 †: direct development
• Acanthocythereis echinata (Hu, 1981) Hu, 1983 †: direct development
• Acanthocythereis ferox (Brady, 1868): direct development
• Acanthocythereis florienensis (Howe & Chambers, 1935) †: direct development
• Acanthocythereis fungosa Al-Furaih, 1980 †: direct development
• Acanthocythereis gujaratensis Khosla & Pant, 1988 †: direct development
• Acanthocythereis hapsida (Bold, 1960) Bold, 1972 †: direct development
• Acanthocythereis horrida (Sars, 1866): direct development
• Acanthocythereis howei Huff, 1970 †: direct development
• Acanthocythereis hystrix (Reuss, 1850) †: direct development
• Acanthocythereis incerta Mckenzie & Reyment & Reyment, 1991 †: direct development
• Acanthocythereis inermis Bonaduce, Ruggieri, Russo & Bismuth, 1992 †: direct development
• Acanthocythereis lobulia Hu & Tao, 2008 †: direct development
• Acanthocythereis meslei Donze & Oertli, 1982 †: direct development
• Acanthocythereis multibulbosa Al-Furaih, 1980 †: direct development
• Acanthocythereis multispicata Howe & Howe, 1973 †: direct development
• Acanthocythereis multispinosa Al-Furaih, 1984 †: direct development
• Acanthocythereis munechikai Ishizaki, 1981 †: direct development
• Acanthocythereis mutsuensis Ishizaki, 1971: direct development
• Acanthocythereis niameyensis Carbonnel, Alzouma & Dikouma, 1990 †: direct development
• Acanthocythereis noblissima (Swain, 1963) Schmidt, 1967 †: direct development
• Acanthocythereis ornata (Müller, 1894): direct development
• Acanthocythereis oxyderca Al-Furaih, 1980 †: direct development
• Acanthocythereis panti Khosla & Nagori, 1989 †: direct development
• Acanthocythereis postcornis (Siddiqui, 1971) †: direct development
• Acanthocythereis posterotubera Al-Furaih, 1980 †: direct development
• Acanthocythereis princegeorgensis Hazel, 1968 †: direct development
• Acanthocythereis projecta Bassiouni, 1969 †: direct development
• Acanthocythereis prora Al-Furaih, 1980 †: direct development
• Acanthocythereis reticulospinosa (Bold, 1946) †: direct development
• Acanthocythereis salahii Bassiouni, 1969 †: direct development
• Acanthocythereis salehi Al-Furaih, 1984 †: direct development