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| Nitzschia fasciculata f. minor Peragallo & Peragallo 1899 |
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| Nitzschia panduriformis var. abrupta Peragallo & Peragallo 1899 |
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| Nitzschia panduriformis var. peralbata Peragallo & Peragallo 1899 |
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| Nitzschia pulchella Peragallo & Peragallo 1899 |
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| Nitzschia punctata sensu Peragallo & Peragallo 1899 |
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| Pseudonitzschia migrans (Cleve) Peragallo & Peragallo 1899 |
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| Pseudonitzschia seriata (Cleve) Peragallo & Peragallo 1899 |
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| Pseudonitzschia seriata var. fraudulenta (Cleve) Peragallo & Peragallo 1899 |
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| Pseudonitzschia sicula (Castracane) Peragallo & Peragallo 1899 |
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| Pseudonitzschia sicula var. bicuneata (Grunow in Cleve & Möller) Peragallo & Peragallo 1899 |
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| Surirella armoricana Peragallo & Peragallo 1899 |
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| Surirella baldjickii var. hyalina Peragallo & Peragallo 1899 |
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| Surirella biseriata f. minor Peragallo & Peragallo 1899 |
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| Surirella elongata Brebisson ex Peragallo & Peragallo 1899 |
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| Surirella fastuosa var. suborbicularis (Grunow in Schmidt et al.) Peragallo & Peragallo 1899 |
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| Surirella hybrida var. balteum (Brun) Peragallo & Peragallo 1899 |
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| Surirella hybrida var. contracta Peragallo & Peragallo 1899 |
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| Surirella intercedens var. abludens (Grunow in Schmidt et al.) Peragallo & Peragallo 1899 |
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| Surirella intercedens var. collare (Schmidt in Schmidt et al.) Peragallo & Peragallo 1899 |
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| Surirella lata var. macraeana (Greville) Peragallo & Peragallo 1899 |
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