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- Cl. acutum var. acutum
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- Closterium acutum var. acutum
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- Cl. baillyanum var. baillyanum
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- Cl. baillyanum var. alpinum
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- Cl. calosporum var. calosporum
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- Closterium incurvum
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- Closterium intermedium
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- Closterium lunula
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- Closterium lunula
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- Closterium lunula
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- Closterium lunula
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- Closterium lunula
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- Closterium lunula
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- Closterium parvulum
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- Closterium parvulum
