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| Amphiprora decussata var. gigantea (Grunow) H. Peragallo in H. Peragallo & M. Peragallo 1897-1908 |
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| Amphora costata var. inflata (Grunow in Schmidt et al.) H. Peragallo & M. Peragallo 1897-1908 |
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| Amphora perstriata var. minor Peragallo & Peragallo 1897-1908 |
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| Bacteriastrum varians var. hyalina (Lauder) Peragallo & Peragallo 1897-1908 |
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| Bellerochea malleus var. biangulata H. Peragallo & M. Peragallo 1897-1908 |
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| Berkeleya micans var. fragilis (Greville) Grunow in Peragallo & Peragallo 1897-1908 |
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| Berkeleya rutilans var. obtusa (Greville) Peragallo & Peragallo 1897-1908 |
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| Berkeleya rutilans var. parasitica (Griffith in Harvey) Peragallo & Peragallo 1897-1908 |
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| Campylodiscus biangulatus var. lorenzianus (Grunow) Peragallo & Peragallo 1897-1908 |
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| Chaetoceros distans var. laciniosa (Schütt) Peragallo & Peragallo 1897-1908 |
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| Cocconeis fluminensis var. subimpleta H. Peragallo in Peragallo & Peragallo 1897-1908 |
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| Cocconeis grata var. nummularia (Greville) Peragallo & Peragallo 1897-1908 |
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| Cocconeis maxima var. niceaensis Peragallo & Peragallo 1897-1908 |
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| Cocconeis scutellum var. riparia (Brun in Schmidt et al.) Peragallo & Peragallo 1897-1908 |
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| Coscinodiscus excentricus f. catenata (Gran) Peragallo & Peragallo 1897-1908 |
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| Coscinodiscus giganteus Peragallo & Peragallo 1897-1908 |
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| Coscinodiscus lineatus f. polychorda (Gran) Peragallo & Peragallo 1897-1908 |
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| Cyclosira bergonii H. Peragallo in Peragallo & Peragallo 1897-1908 |
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| Diatoma elongatum var. densestriata (Grunow in Van Heurck) M. Peragallo 1897-1908 |
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| Diploneis didyma var. obliqua (Brun) M. Peragallo 1897-1908 |
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