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| Pleurosigma formosum var. balearica (balearicum) (Cleve & Grunow in Cleve & Moller) H. Peragallo 1891 |
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| Pleurosigma gallicum (Grunow in Van Heurck) H. Peragallo 1891 |
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| Pleurosigma grovesii (grovei) Cleve ex H. Peragallo 1891 |
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| Pleurosigma hyperborea (Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma ibericum H. Peragallo 1891 |
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| Pleurosigma intermedium var. directum (Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma intermedium var. subrectum H. Peragallo 1891 |
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| Pleurosigma italicum H. Peragallo 1891 |
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| Pleurosigma javanicum H. Peragallo 1891 |
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| Pleurosigma latiusculum H. Peragallo 1891 |
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| Pleurosigma longum var. kerguelense (Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma longum var. subrigida (Grunow in Cleve & Moller; Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma macilentum H. Peragallo 1891 |
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| Pleurosigma marinum var. antillarum H. Peragallo 1891 |
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| Pleurosigma marinum var. ibericum H. Peragallo 1891 |
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| Pleurosigma marinum var. italica (italicum) H. Peragallo 1891 |
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| Pleurosigma naviculaceum var. hungaricum (Cleve & Brun in Brun & Tempère) H. Peragallo 1891 |
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| Pleurosigma nicobaricum var. indica H. Peragallo 1891 |
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| Pleurosigma nicobaricum var. sagitta (Tempère & Brun in Brun & Tempère) H. Peragallo 1891 |
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| Pleurosigma nubecula var. thumii Castracane ex H. Peragallo 1891 |
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