• Abrochtha carnivora Ricci, Melone & Walsh, 2001
• Abrochtha intermedia (Beauchamp, 1909)
• Abrochtha kingi Birky, Ricci, Melone & Fontaneto, 2011
• Abrochtha meselsoni Birky, Ricci, Melone & Fontaneto, 2011
• Abrochtha sonneborni Birky, Ricci, Melone & Fontaneto, 2011
• Acanthodactylus gracilis Tessin, 1890 accepted as Trichocerca gracilis (Tessin, 1890)
• Actinurus neptunius Ehrenberg, 1830 accepted as Rotaria neptunia (Ehrenberg, 1830)
• Actinurus ovatus Anderson, 1889 accepted as Rotaria ovata (Anderson, 1889)
• Acyclus inquietus Leidy, 1882
• Adactyla verrucosa Barrois & Daday, 1894 (uncertain > taxon inquirendum)
• Adineta acuticornis Haigh, 1967
• Adineta alluaudi Certes, 1903 accepted as Adineta oculata (Milne, 1886)
• Adineta barbata Janson, 1893
• Adineta bartosi Wulfert, 1960
• Adineta beysunae Örstan, 2018
• Adineta clauda Bryce, 1893 accepted as Bradyscela clauda (Bryce, 1893)
• Adineta coatsi Iakovenko, Smykla, Convey, Kasparona, Kozeretska, Trokhymets, Dykyy, Plewka, Devetter & Janko, 2015
• Adineta cuneata Milne, 1916
• Adineta donneri Bielanska-Grajner, Ejsmont-Karabin & Iakovenko, 2013 (unaccepted)
• Adineta editae Iakovenko, 2015
• Adineta elongata Rodewald, 1935
• Adineta emsliei Iakovenko, Smykla, Convey, Kasparona, Kozeretska, Trokhymets, Dykyy, Plewka, Devetter & Janko, 2015
• Adineta fontanetoi Iakovenko, Smykla, Convey, Kasparona, Kozeretska, Trokhymets, Dykyy, Plewka, Devetter & Janko, 2015
• Adineta glauca Wulfert, 1942
• Adineta gracilis Janson, 1893
• Adineta grandis Murray, 1910
• Adineta longicornis Murray, 1906
• Adineta oculata (Milne, 1886)
• Adineta rhomboidea Bērziņš, 1950
• Adineta ricciae Segers & Shiel, 2005
• Adineta steineri Bartoš, 1951
• Adineta tuberculosa Janson, 1893
• Adineta vaga (Davis, 1873)
• Albertia aciliata Radkewitsch, 1870 accepted as Balatro aciliatus (Radkewitsch, 1870)
• Albertia bernardi Hlava, 1905 accepted as Albertia naidis Bousfield, 1886
• Albertia caudata Manfredi, 1927 accepted as Albertia naidis Bousfield, 1886
• Albertia crystallina Schultze, 1851
• Albertia intrusor Gosse, 1886 accepted as Albertia naidis Bousfield, 1886
• Albertia naidis Bousfield, 1886
• Albertia ovagranulata Valovaya, 1990
• Albertia reicheltae Koste, 1970
• Albertia soyeri Coineau & Kunst, 1964 accepted as Albertia naidis Bousfield, 1886
• Albertia typhlina Harring & Myers, 1928
• Albertia vermiculus Dujardin, 1838
• Albertia woronkowi Zenkewitsch, 1922
• Allodicranophorus bulgaricus (Althaus, 1957)
• Amphibolidina megalotrocha Schmarda, 1850 (uncertain > taxon inquirendum)
• Anapus ovalis Bergendal, 1892 accepted as Ascomorpha ovalis (Bergendal, 1892)
• Anchitestudinella mekongensis Bērziņš, 1973
• Anelcodiscus pellucidus Leidy, 1852 (uncertain > taxon inquirendum)
• Anomopus chasmagnathi Mane-Garzon & Montero, 1973
• Anomopus telphusae Piovanelli, 1903
• Anourella cithara Bory de St. Vincent, 1826 accepted as Brachionus pala Müller, 1786
• Anourella luth Bory de St. Vincent, 1826 accepted as Notholca squamula (Müller, 1786)
• Anourella lyra Bory de St. Vincent, 1826 accepted as Notholca striata (Müller, 1786)
• Anourella pandurina Bory de St. Vincent, 1826 accepted as Notholca bipalium (Müller, 1786)
• Anthos quadrilobus Schoch, 1868 (uncertain > taxon inquirendum)
• Anuraea aculeata Ehrenberg, 1832 accepted as Keratella quadrata (Müller, 1786)
• Anuraea acuminata Ehrenberg, 1832 accepted as Notholca acuminata (Ehrenberg, 1832)
• Anuraea angulata Daday, 1906 accepted as Notholca angulata (Daday, 1906)
• Anuraea balthica Eichwald, 1852 (uncertain > taxon inquirendum)
• Anuraea biremis (uncertain)
• Anuraea brevispina Gosse, 1851 accepted as Keratella brevispina (Gosse, 1851) accepted as Keratella testudo (Ehrenberg, 1832)
• Anuraea clypeus Daday, 1906 accepted as Notholca clypeus (Daday, 1906)
• Anuraea cochlearis Gosse, 1851 accepted as Keratella cochlearis (Gosse, 1851)
• Anuraea cruciformis Thompson, 1892 accepted as Keratella cruciformis (Thompson, 1892)
• Anuraea curvicornis Ehrenberg, 1834 accepted as Keratella quadrata var. curvicornis (Ehrenberg, 1834) accepted as Keratella ticinensis (Callerio, 1920)
• Anuraea divaricata Weisse, 1845 accepted as Brachionus calyciflorus Pallas, 1766
• Anuraea eichwaldi Levander, 1894 accepted as Keratella eichwaldi (Levander, 1894)
• Anuraea falculata Ehrenberg, 1838 accepted as Keratella falculata (Ehrenberg, 1838) accepted as Keratella serrulata (Ehrenberg, 1838)
• Anuraea fissa Gosse, 1851 accepted as Anuraeopsis fissa Gosse, 1851
• Anuraea foliacea Ehrenberg, 1838 accepted as Notholca foliacea (Ehrenberg, 1838)
• Anuraea frenzeli Eckstein, 1895 accepted as Keratella quadrata var. frenzeli (Eckstein, 1895) accepted as Keratella quadrata (Müller, 1786)
• Anuraea gleasonii Up De Graff, 1883 (uncertain > taxon inquirendum)
• Anuraea gracilis Loppens, 1907 (uncertain > taxon inquirendum)
• Anuraea heptodon Perty, 1850 accepted as Notholca heptodon (Perty, 1850) accepted as Notholca foliacea (Ehrenberg, 1838)
• Anuraea hypelasma Gosse, 1886 accepted as Anuraeopsis hypelasma (Gosse, 1886) accepted as Anuraeopsis fissa Gosse, 1851
• Anuraea inermis Ehrenberg, 1834 (uncertain > taxon inquirendum)
• Anuraea intermedia Imhof, 1885 accepted as Keratella intermedia (Imhof, 1885)
• Anuraea longicornis Schmarda, 1850 (uncertain > taxon inquirendum)
• Anuraea longispina Imhof, 1883 accepted as Keratella longispina (Imhof, 1883) accepted as Keratella cochlearis (Gosse, 1851)
• Anuraea longispina Kellicott, 1879 accepted as Kellicottia longispina (Kellicott, 1879)
• Anuraea longistyla Schmarda, 1859 (uncertain > taxon inquirendum)
• Anuraea octoceras Ehrenberg, 1834 (uncertain > taxon inquirendum)
• Anuraea palea Ehrenberg, 1830 accepted as Brachionus calyciflorus Pallas, 1766
• Anuraea paludosa Lucks, 1912 accepted as Keratella paludosa (Lucks, 1912)
• Anuraea procurva Thorpe, 1891 accepted as Keratella procurva (Thorpe, 1891)
• Anuraea quadridentata Ehrenberg, 1838 accepted as Keratella quadrata (Müller, 1786)
• Anuraea reducta Huber-Pestalozzi, 1929 accepted as Keratella reducta (Huber-Pestalozzi, 1929)
• Anuraea schista Gosse, 1887 (uncertain > taxon inquirendum)
• Anuraea scutata Thorpe, 1891 (uncertain > taxon inquirendum)
• Anuraea serrulata Ehrenberg, 1838 accepted as Keratella serrulata (Ehrenberg, 1838)
• Anuraea spinosa Imhof, 1883 accepted as Kellicottia longispina (Kellicott, 1879)
• Anuraea stipitata Ehrenberg, 1838 accepted as Keratella stipitata (Ehrenberg, 1838) accepted as Keratella cochlearis (Gosse, 1851)
• Anuraea tecta (uncertain)
• Anuraea testudo Ehrenberg, 1832 accepted as Keratella testudo (Ehrenberg, 1832)
• Anuraea tuberosa Imhof, 1885 (uncertain > taxon inquirendum)
• Anuraea valga Ehrenberg, 1834 accepted as Keratella valga (Ehrenberg, 1834)
• Anuraeopsis berzinsi Sudzuki, 1998 accepted as Anuraeopsis navicula berzinsi Sudzuki, 1998
• Anuraeopsis coelata Beauchamp, 1932