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| Frustulia vulgaris var. typica Cleve-Euler 1952 |
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| Gomphonitzschia ungeri f. rostrata Cleve-Euler 1952 |
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| Gyrosigma acuminatum var. lacustre (W. Smith) Cleve-Euler 1952 |
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| Gyrosigma attenuatum var. hippocampus (W. Smith) Cleve-Euler 1952 |
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| Gyrosigma attenuatum var. typicum Cleve-Euler 1952 |
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| Gyrosigma distortum var. marinum Cleve-Euler 1952 |
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| Gyrosigma fasciola (fasciolum) var. genuinum Cleve-Euler 1952 |
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| Gyrosigma prolongatum var. typicum Cleve-Euler 1952 |
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| Gyrosigma scalproides var. typicum Cleve-Euler 1952 |
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| Gyrosigma spenceri (spencerii) f. major Cleve-Euler 1952 |
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| Gyrosigma spencerii var. smithii (Grunow) Cleve-Euler 1952 |
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| Gyrosigma tenuirostrum (Grunow in Cleve & Grunow) Cleve-Euler 1952 |
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| Gyrosigma tenuissimum var. genuina Cleve-Euler 1952 |
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| Hantzschia amphioxys var. aequalis Cleve-Euler 1952 |
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| Hantzschia amphioxys var. austroborealis Cleve-Euler 1952 |
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| Hantzschia amphioxys f. constricta (Pantocsek) Cleve-Euler 1952 |
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| Hantzschia amphioxys var. densestriata (Fontell) Cleve-Euler 1952 |
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| Hantzschia amphioxys var. dubravicensis (Grunow) Cleve-Euler 1952 |
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| Hantzschia amphioxys var. falcata Cleve-Euler 1952 |
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| Hantzschia amphioxys var. karelica Cleve-Euler 1952 |
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