| WebNameShort | |
| Gyrosigma balticum var. lorenzii (Grunow) Frenguelli & Orlando 1958 |
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| Gyrosigma subsalinum (H. Peragallo) Frenguelli & Orlando 1958 |
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| Navicula multicopsis var. cymbelloides (M. Peragallo) Frenguelli & Orlando 1958 |
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| Pinnularia quadratarea (quadratacea, quadrataria) var. antarctica (M. Peragallo) Frenguelli & Orlando 1958 |
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| Achnanthes bongrainii (Peragallo) Frenguelli & Orlando 1958 |
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| Achnanthes bongrainii var. parallela (Peragallo) Frenguelli & Orlando 1958 |
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| Achnanthes simplex (Peragallo) Frenguelli & Orlando 1958 |
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| Cocconeis antarctica (Van Heurck) Frenguelli & Orlando 1958 |
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| Fragilariopsis linearis var. curta (Van Heurck) Frenguelli in Frenguelli & Orlando 1958 |
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| Melosira pantocseki (pantocsekii) (Van Heurck) Frenguelli in Frenguelli & Orlando 1958 |
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| Achnanthes muscorum var. elliptica Frenguelli & Orlando 1958 |
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| Amphiprora lauriensis Frenguelli & Orlando 1958 |
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| Cocconeis californica var. antarctica Frenguelli & Orlando 1958 |
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| Cocconeis debenedettii Frenguelli & Orlando 1958 |
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| Cocconeis lauriensis Frenguelli & Orlando 1958 |
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| Cocconeis melchiori Frenguelli & Orlando 1958 |
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| Cocconeis orbicularis Frenguelli & Orlando 1958 |
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| Cocconeis reticulata var. deceptionis Frenguelli & Orlando 1958 |
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| Coscinodiscus coronula Frenguelli & Orlando 1958 |
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| Coscinodiscus margaritae Frenguelli & Orlando 1958 |
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