| WebNameShort | |
| Actinocyclus ehrenbergii var. crassa (W. Smith) Hustedt 1929 |
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| Actinocyclus ehrenbergii var. ralfsii (W. Smith) Hustedt 1929 |
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| Actinocyclus ehrenbergii var. sparsa (Gregory) Hustedt 1929 |
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| Actinocyclus ehrenbergii var. tenella (Brébisson) Hustedt 1929 |
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| Auliscus reticulatus var. schmidtii (Grundler in Schmidt et al.) Hustedt 1929 |
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| Rhizosolenia alata f. indica (H. Peragallo) Hustedt 1929 |
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| Rhizosolenia alata f. inermis (Castracane) Hustedt 1929 |
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