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| Achnanthes hungarica var. rivularia (Frenguelli) Frenguelli 1933 |
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| Amphipleura lindheimeri var. neotropica Frenguelli 1933 |
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| Anomoeoneis sculpta var. gigantea (M. Peragallo in Héribaud) Frenguelli 1933 |
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| Denticula yberiensis Frenguelli 1933 |
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| Diploneis elliptica var. tropica (Zimmermann) Frenguelli 1933 |
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| Diploneis zannii Frenguelli 1933 |
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| Encyonema cristatum Frenguelli 1933 |
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| Encyonema excisum (M. Peragallo & Héribaud in Héribaud) Frenguelli 1933 |
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| Encyonema excisum f. minor Frenguelli 1933 |
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| Encyonema turgidum var. itatiensis (italiensis) Frenguelli 1933 |
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| Eunotia camelus var. arcuata Frenguelli 1933 |
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| Eunotia camelus var. juga Frenguelli 1933 |
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| Eunotia camelus f. major Frenguelli 1933 |
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| Eunotia camelus f. major Frenguelli 1933 |
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| Eunotia camelus f. minor Frenguelli 1933 |
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| Eunotia camelus f. minor Frenguelli 1933 |
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| Eunotia camelus var. undulata Frenguelli 1933 |
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| Eunotia correntina Frenguelli 1933 |
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| Eunotia didyma var. jugulata Frenguelli 1933 |
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| Eunotia didyma var. papilio Frenguelli 1933 |
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