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| Pleurosigma simum (Ehrenberg; Ehrenberg) Ralfs in Pritchard 1861 |
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| Pleurosigma sinensis (Ehrenberg) Ralfs in Pritchard 1861 |
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| Pleurosigma sinuosum (Ehrenberg) Ralfs in Pritchard 1861 |
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| Pleurosigma subtile (subtilis) (Brébisson in Kutzing) Ralfs in Pritchard 1861 |
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| Pleurosigma thuringicum (Kützing) Ralfs in Pritchard 1861 |
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| Podocystis adriatica (Kützing) Ralfs in Pritchard 1861 |
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| Porpeia quadriceps J.W. Bailey in litt. Ralfs in Pritchard 1861 |
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| Pyxidicula globata Ralfs in Pritchard 1861 |
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| Pyxidicula scarabaeus (Ehrenberg) Ralfs in Pritchard 1861 |
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| Rhabdonema crozieri (crozierii) Ralfs in Pritchard 1861 |
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| Rhipidophora tincta (Agardh) Ralfs in Pritchard 1861 |
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| Rhizosolenia robusta Norman ex Ralfs in Pritchard 1861 |
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| Stauroneis aethiopica Ehrenberg in Ralfs in Pritchard 1861 |
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| Stauroneis amphioxys (Ehrenberg) Ralfs in Pritchard 1861 |
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| Stauroneis decurrens Ehrenberg in Ralfs in Pritchard 1861 |
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| Stauroneis dendrobates (Ehrenberg) Ralfs in Pritchard 1861 |
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| Stauroneis ehrenbergii Ralfs in Pritchard 1861 |
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| Stauroneis granulata (Ehrenberg) Ralfs in Pritchard 1861 |
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| Stauroneis gregorii Ralfs in Pritchard 1861 |
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| Stauroneis mesogongyla (Ehrenberg) Ralfs in Pritchard 1861 |
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