| WebNameShort | |
| Rhabdonema arcuatum f. contracta Fricke in Schmidt et al. 1899 |
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| Rhabdonema ehrenbergii Fricke in Schmidt et al. 1899 |
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| Rhabdonema japonicum var. valdelata (Tempère & Brun in Brun & Tempère) Fricke in Schmidt et al. 1899 |
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| Rhabdonema japonicum var. valdelatasparsicostata (valdelata sparsicostata) Fricke in Schmidt et al. 1899 |
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| Rhabdonema minutum var. sulcata Fricke in Schmidt et al. 1899 |
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| Rhabdonema subrostratum Fricke in Schmidt et al. 1899 |
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| Rhabdonema subrostratum var. parallelolateralis Fricke in Schmidt et al. 1899 |
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