• Keratella Bory de St. Vincent, 1822
• Keratella ahlstromi Russell, 1951
• Keratella albertae Garcia-Morales, Dominguez-Dominguez & Elias-Gutierrez, 2021
• Keratella americana Carlin, 1943
• Keratella americana f. hispida Vasques, Koste & Medina, 1991 accepted as Keratella americana Carlin, 1943
• Keratella americana f. pustulata Koste, 1982 accepted as Keratella americana Carlin, 1943
• Keratella americana nhamundaiensis Koste, 1982 accepted as Keratella nhamundaiensis Koste, 1982
• Keratella armadura Stemberger, 1990
• Keratella australis Bērziņš, 1963
• Keratella brevispina (Gosse, 1851) accepted as Keratella testudo (Ehrenberg, 1832)
• Keratella canadensis Bērziņš, 1954
• Keratella carinata Russell, 1950 accepted as Keratella javana Hauer, 1937
• Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis f. aspina Green, 2005 accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis f. macracantha (Lauterborn, 1898) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis f. micracantha (Lauterborn, 1900) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis f. postcurvata Thomasson, 1957 (uncertain > taxon inquirendum)
• Keratella cochlearis f. robusta (Lauterborn, 1900) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis f. tuberculata (Lauterborn, 1900) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis f. valdiviensis Thomasson, 1957 accepted as Keratella valdiviensis Thomasson, 1957
• Keratella cochlearis nordica Kutikova, 1978
• Keratella cochlearis pachyacantha Thomasson, 1980
• Keratella cochlearis polaris De Smet & Bafort, 1990
• Keratella cochlearis recurvispina (Gosse, 1851) accepted as
• Keratella cochlearis tecta (Gosse, 1851) accepted as Keratella tecta (Gosse, 1851)
• Keratella cochlearis var. baicalensis Gaigalas, 1958 accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. baltica Imhof, 1886 (unaccepted > nomen nudum)
• Keratella cochlearis var. baltica Sokolova, 1927 accepted as Keratella cochlearis f. macracantha (Lauterborn, 1898) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. carinata (Levander, 1891) (uncertain > taxon inquirendum)
• Keratella cochlearis var. faluta Ahlstrom, 1943 accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. hispida (Lauterborn, 1898) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. hispida f. ecauda (Ammann, 1921) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. hispida f. microcantha Słonimski, 1932 accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. hispida f. pustulata (Lauterborn, 1900) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. javana Hauer, 1937 accepted as Keratella javana Hauer, 1937
• Keratella cochlearis var. leptacantha (Lauterborn, 1900) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. leptacantha f. ecaudata (Lauterborn, 1900) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. punctata Myers, 1938 accepted as Keratella taurocephala Myers, 1938
• Keratella cochlearis var. recurvispina (Jägerskiöld, 1894) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. revoluta (Brehm, 1910) (uncertain > taxon inquirendum)
• Keratella cochlearis var. scutiformis Delachaux, 1927 accepted as Keratella cochlearis (Gosse, 1851)
• Keratella cochlearis var. taurocephala Myers, 1938 accepted as Keratella taurocephala Myers, 1938
• Keratella crassa Ahlstrom, 1943
• Keratella cruciformis (Thompson, 1892)
• Keratella cruciformis eichwaldi (Levander, 1894) accepted as Keratella eichwaldi (Levander, 1894)
• Keratella cruciformis f. kamtschatica Kutikova, 1970 accepted as Keratella kamtschatica Kutikova, 1970 accepted as Keratella eichwaldi (Levander, 1894)
• Keratella cruciformis f. wirketissi Kutikova, 1970 accepted as Keratella wirketissi Kutikova, 1970 accepted as Keratella cruciformis (Thompson, 1892)
• Keratella cuitzeiensis Garcia-Morales, Dominguez-Dominguez & Elias-Gutierrez, 2021
• Keratella earlinae Ahlstrom, 1943
• Keratella earlinae var. nesiotica Ahlstrom, 1943 accepted as Keratella earlinae Ahlstrom, 1943
• Keratella edmondsoni Ahlstrom, 1943
• Keratella eichwaldi (Levander, 1894)
• Keratella falculata (Ehrenberg, 1838) accepted as Keratella serrulata (Ehrenberg, 1838)
• Keratella gracilenta Ahlstrom, 1943 accepted as Keratella americana Carlin, 1943
• Keratella heywoodi Dartnall, 2005 accepted as Keratella kostei Paggi, 1981
• Keratella hiemalis Carlin, 1943
• Keratella huapanguensis Garcia-Morales, Dominguez-Dominguez & Elias-Gutierrez, 2021
• Keratella intermedia (Imhof, 1885) (uncertain > taxon inquirendum)
• Keratella irregularis (Lauterborn, 1898)
• Keratella irregularis f. angulifera (Lauterborn, 1900) accepted as Keratella irregularis (Lauterborn, 1898)
• Keratella irregularis f. connectens (Lauterborn, 1900) accepted as Keratella irregularis (Lauterborn, 1898)
• Keratella irregularis f. ecaudata (Lauterborn, 1900) accepted as Keratella irregularis (Lauterborn, 1898)
• Keratella irregularis f. recta Hauer, 1952 accepted as Keratella irregularis (Lauterborn, 1898)
• Keratella irregularis f. wartmanni (Asper & Heuscher, 1889) accepted as Keratella irregularis (Lauterborn, 1898)
• Keratella javana Hauer, 1937
• Keratella kamtschatica Kutikova, 1970 accepted as Keratella eichwaldi (Levander, 1894)
• Keratella kostei Paggi, 1981
• Keratella lenzi Hauer, 1953
• Keratella lenzi caudata Koste, 1972 accepted as Keratella americana Carlin, 1943
• Keratella lenzi f. ayui Marinone, 1995 accepted as Keratella lenzi Hauer, 1953
• Keratella lenzi f. heliaca Bērziņš, 1955 accepted as Keratella lenzi Hauer, 1953
• Keratella lenzi var. heliaca Bērziņš, 1955 accepted as Keratella lenzi f. heliaca Bērziņš, 1955 accepted as Keratella lenzi Hauer, 1953
• Keratella longispina (Imhof, 1883) accepted as Keratella cochlearis (Gosse, 1851)
• Keratella lucksi Burckhardt, 1944 accepted as Keratella ticinensis (Callerio, 1920)
• Keratella maliensis Koste & Tobias, 1987
• Keratella mexicana Kutikova & Silva-Briano, 1995
• Keratella mixta (Oparina-Charitonova, 1924)
• Keratella mixta ahlstromiella Bērziņš, 1961 accepted as Keratella mixta (Oparina-Charitonova, 1924)
• Keratella mongoliana Segers & Rong, 1998
• Keratella morenoi Modenutti, Diéguez & Segers, 1998
• Keratella nhamunda Koste & Robertson, 1983 accepted as Keratella nhamundaiensis Koste, 1982
• Keratella nhamundaiensis Koste, 1982
• Keratella octoceros (Abildgaard, 1793) (uncertain > taxon inquirendum)
• Keratella ona Boltovskoy & Urrejola, 1977
• Keratella paludosa (Lucks, 1912)
• Keratella paludosa f. obtusa Hauer, 1935 accepted as Keratella paludosa (Lucks, 1912)
• Keratella paludosa var. aspina Wulfert, 1951 accepted as Keratella paludosa (Lucks, 1912)
• Keratella paludosa var. typica Wulfert, 1951 accepted as Keratella paludosa (Lucks, 1912)
• Keratella procurva (Thorpe, 1891)
• Keratella procurva f. monospina Mirabdullaev, 1990 accepted as Keratella procurva (Thorpe, 1891)
• Keratella procurva haterumensis Sudzuki, 1992 accepted as Keratella procurva (Thorpe, 1891)
• Keratella procurva robusta Koste & Shiel, 1980 accepted as Keratella cochlearis (Gosse, 1851)
• Keratella quadrata (Müller, 1786)
• Keratella quadrata australis Bērziņš, 1963 accepted as Keratella australis Bērziņš, 1963
• Keratella quadrata dispersa Carlin, 1943
• Keratella quadrata f. araneosa Ahlstrom, 1943 accepted as Keratella quadrata (Müller, 1786)
• Keratella quadrata f. baicalensis Gaigalas, 1958 accepted as Keratella quadrata (Müller, 1786)
• Keratella quadrata f. klementi Voigt, 1957 accepted as Keratella quadrata (Müller, 1786)
• Keratella quadrata f. reticulata Carlin, 1943 accepted as Keratella quadrata (Müller, 1786)
• Keratella quadrata f. valgoides Edmondson & Hutchinson, 1934 (uncertain > taxon inquirendum)