• 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