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| Pleurosigma balticum var. terryanum H. Peragallo 1891 |
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| Pleurosigma balticum var. thumii (Cleve ex H. Peragallo) H. Peragallo 1891 |
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| Pleurosigma balticum var. wansbeckii (Donkin) H. Peragallo 1891 |
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| Pleurosigma barbadense (Grunow in Cleve & Moller; Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma brunii Cleve ex H. Peragallo 1891 |
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| Pleurosigma clevei var. fossilis Brun ex H. Peragallo 1891 |
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| Pleurosigma convexum (Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma cuspidatum (Cleve) H. Peragallo 1891 |
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| Pleurosigma decorum var. americanum H. Peragallo 1891 |
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| Pleurosigma decorum var. dalmaticum sensu H. Peragallo 1891 |
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| Pleurosigma decorum var. inflatum H. Peragallo 1891 |
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| Pleurosigma delicatulum var. clevei (Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma delicatulum var. elegantissimum (Castracane) H. Peragallo 1891 |
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| Pleurosigma delicatulum var. macilentum H. Peragallo 1891 |
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| Pleurosigma distortum var. parkeri (Harrison) H. Peragallo 1891 |
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| Pleurosigma elongatum var. balearicum H. Peragallo 1891 |
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| Pleurosigma elongatum var. gracilescens (Grunow in Cleve & Grunow) H. Peragallo 1891 |
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| Pleurosigma fasciolum (fasciola) var. arcuatum (arcuata) (Donkin) H. Peragallo 1891 |
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| Pleurosigma fasciolum (fasciola) var. macrum (W. Smith) H. Peragallo 1891 |
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| Pleurosigma fasciolum (fasciola) var. prolongatum (W. Smith) H. Peragallo 1891 |
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