| WebNameShort | |
| Navicula stigmata Frenguelli 1941 |
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| Navicula stigmata var. rostrata Frenguelli 1941 |
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| Navicula subcreta Frenguelli 1941 |
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| Neidium affine (affinis) var. constricta Frenguelli 1941 |
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| Neidium platense Frenguelli 1941 |
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| Pinnularia doeringii var. undulata (Frenguelli) Frenguelli 1941 |
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| Surirella minuta var. peduliformis Frenguelli 1941 |
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| Synedra goulardi var. fluviatilis (Lemmermann) Frenguelli 1941 |
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| Tryblionella panduriformis var. minor (Grunow in Cleve & Grunow) Frenguelli 1941 |
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