• Abyssobairdia anisovalva Coles & Whatley, 1989 †
• Acanthoscapha (Acanthoscapha) navicula (Ulrich, 1891) † represented as Acanthoscapha navicula (Ulrich, 1891) †
• Acanthoscapha angularis (Ulrich, 1891) †
• Acanthoscapha blessi Kozur, 1985 †
• Acanthoscapha blumenstengeli Kozur, 1985 †
• Acanthoscapha cristata (Ulrich, 1891) † accepted as Beecherella cristata Ulrich, 1891 †
• Acanthoscapha dubia Polenova, 1970 †
• Acanthoscapha laterispina Zagora, 1967 † accepted as Carentascapha laterispina (Zagora, 1967) †
• Acanthoscapha lenticulata (Stewart & Hendrix, 1945) Berdan, 1960 †
• Acanthoscapha mesodevonica Adamczak, 1976 †
• Acanthoscapha navicula (Ulrich, 1891) †
• Acanthoscapha ovata (Ulrich, 1891) †
• Acanthoscapha pulchella Becker & Sanchez De Posada, 1977 †
• Acanthoscapha subtumida (Ulrich, 1891) Bassler & Kellett, 1934 † accepted as  †
• Acanthoscapha subtumida intermedia (Ulrich, 1891) † accepted as  †
• Acanthoscapha subtumida subtumida (Ulrich, 1891) † accepted as  †
• Acanthoscapha takacsae Kozur, 1985 †
• Acratia (Acratia) minuta Blumenstengel, 1970 †
• Acratia (Cooperuna) archedensis (Tschigova, 1958) Crasquin, 1986 † (unaccepted > nomen nudum)
• Acratia (Cooperuna) cooperi Gründel, 1962 † accepted as Cooperuna cooperi (Gruendel, 1962) †
• Acratia (Cooperuna) gibbera Lethiers, 1981 †
• Acratia (Cooperuna) granuliformis Demidenko, 1976 †
• Acratia (Cooperuna) gruendeli Rozhdestvenskaya, 1972 †
• Acratia (Cooperuna) hemisphairia Crasquin, 1985 †
• Acratia (Cooperuna) rootensis Lethiers, 1981 †
• Acratia (Cooperuna) rostrata (Ljaschenko, 1960) †
• Acratia (Cooperuna) subelongata Rozhdestvenskaya, 1972 † accepted as  †
• Acratia (Cooperuna) supinaeformis Lethiers, 1981 †
• Acratia (Cooperuna) vestita Lethiers, 1981 †
• Acratia (Cooperuna) zadonicaeformis Lethiers, 1981 †
• Acratia acuta (Jones & Kirkby, 1895) †
• Acratia adunca Guan, 1978 †
• Acratia antefabaeformis Lethiers, 1981 †
• Acratia anteracuminata Wang, 1978 †
• Acratia caeracella Forel & Gradinaru, 2018 †
• Acratia cooperi (Gruendel, 1962) † accepted as Cooperuna cooperi (Gruendel, 1962) †
• Acratia deloi Geis, 1932 †
• Acratia disjuncta Morey, 1935 † accepted as Chamishaella disjuncta (Morey, 1935) Sohn, 1971 †
• Acratia disjunctus Morey, 1935 † accepted as Acratia disjuncta Morey, 1935 † accepted as Chamishaella disjuncta (Morey, 1935) Sohn, 1971 †
• Acratia elegans Adamczak, 1976 †
• Acratia exposita Rozhdestvenskaya, 1972 †
• Acratia fusiformis Schischkinskaja, 1959 †
• Acratia guangyuanensis Xie, 1989 †
• Acratia hungarica Kozur, 1985 †
• Acratia innumera Rozhdestvenskaya, 1972 †
• Acratia inornata Cordell, 1952 † accepted as Bohlenatia inornata (Cordell, 1952) Gruendel, 1962 †
• Acratia magna Delo, 1930 †
• Acratia mashanensis Guan, 1978 †
• Acratia minuta Blumenstengel, 1970 † (accepted > unreplaced junior homonym)
• Acratia mucronata Cooper, 1941 † represented as  †
• Acratia obtusa Cooper, 1941 † represented as  †
• Acratia olivifera Chen, 1958 †
• Acratia porrecta Demidenko, 1976 †
• Acratia posteroinclinata Kozur, 1985 †
• Acratia posthungarica Kozur, 1985 †
• Acratia praetypica Posner, 1951 † represented as  †
• Acratia pulchra Posner, 1951 †
• Acratia qinglongensis Wang, 1978 †
• Acratia recurvata Cordell, 1952 †
• Acratia rostrata Gorak, 1967 † (accepted > unreplaced junior homonym)
• Acratia rostrata Ljaschenko, 1960 † accepted as Acratia (Cooperuna) rostrata (Ljaschenko, 1960) †
• Acratia schreteri Kozur, 1985 †
• Acratia subcurvata Buschmina, 1975 †
• Acratia subfusiformis Wang, 1978 †
• Acratia tumida Cooper, 1941 †
• Acratia typica Delo, 1930 †
• Acratia ventriosa Gründel, 1961 † represented as  †
• Acratia visnyoensis Kozur, 1985 †
• Acratia visnyoensis praecursor Kozur, 1985 †
• Acratia visnyoensis visnyoensis Kozur, 1985 †
• Acratia zhongyingensis Wang, 1978 †
• Acratina gusevae Kozur, 1985 †
• Acratina suprapermiana Kozur, 1985 †
• Actuaria diffusa Schneider, 1956 † accepted as Bairdiacypris diffusa (Schneider, 1956) †
• Acutiangulata acutiangulata (Posner, 1960) † accepted as  †
• Acutiangulata aequalis (Jones & Kirkby, 1886) † accepted as Bythocypris aequalis (Jones & Kirkby, 1886) †
• Acutiangulata arrecta Bushmina, 1968 †
• Acutiangulata asulensis Ivanova, 1980 †
• Acutiangulata insolens Bushmina, 1977 †
• Acutiangulata quadrata Robinson, 1978 †
• Acutiangulata rara Bushmina, 1968 †
• Acutiangulata rotunda Buschmina, 1977 †
• Acutiangulata tumefacta Bushmina, 1979 †
• Alanella lenticulata (Stewart & Hendrix, 1945) Kesling & Sohn, 1958 † accepted as Acanthoscapha lenticulata (Stewart & Hendrix, 1945) Berdan, 1960 †
• Anchistrocheles acerosa (Brady, 1868) Brady & Norman, 1889
• Anchistrocheles aculeata Müller, 1908 accepted as Bythopussella aculeata (Müller, 1908)
• Anchistrocheles angulata (Brady, 1870) accepted as Orlovibairdia angulata (Brady, 1870)
• Anchistrocheles antemacella Maddocks, 1969
• Anchistrocheles arcaforma Swanson, 1979 accepted as Orlovibairdia arcaforma (Swanson, 1979)
• Anchistrocheles barnharti Maddocks, 1976
• Anchistrocheles bensoni Maddocks, 1969
• Anchistrocheles bradyi Scott, 1905
• Anchistrocheles brandtae (Brandão, 2008) accepted as Bythopussella brandtae Brandão, 2008
• Anchistrocheles darwini Maddocks & Iliffe, 1991
• Anchistrocheles eximia Herrig, 1993 †
• Anchistrocheles fumata Brady, 1890
• Anchistrocheles hartmanni Maddocks, 1976
• Anchistrocheles hayatotanakai Ito & Tsukagoshi, 2022
• Anchistrocheles hondai Yajima, 1987 †
• Anchistrocheles interrupta Aiello, Barra & Bonaduce, 1996 †