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| Nitzschia subtilis var. paleacea Grunow in Cleve & Grunow 1880 |
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| Nitzschia sulcata Grunow in Cleve & Grunow 1880 |
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| Nitzschia thermalis var. littoralis (littorea) Grunow in Cleve & Grunow 1880 |
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| Nitzschia tongatensis Grunow in Cleve & Grunow 1880 |
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| Nitzschia tryblionella var. ambigua Grunow in Cleve & Grunow 1880 |
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| Nitzschia tryblionella var. genuina Grunow in Cleve & Grunow 1880 |
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| Nitzschia tryblionella var. maxima Grunow in Cleve & Grunow 1880 |
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| Nitzschia tryblionella var. obtusiuscula Grunow in Cleve & Grunow 1880 |
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| Nitzschia tryblionella var. salinarum Grunow in Cleve & Grunow 1880 |
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| Nitzschia tryblionella var. yarrensis Grunow in Cleve & Grunow 1880 |
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| Nitzschia tubicola Grunow in Cleve & Grunow 1880 |
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| Nitzschia virgata var. borealis Grunow in Cleve & Grunow 1880 |
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| Nitzschia virgata var. wittii Grunow in Cleve & Grunow 1880 |
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| Nitzschia vitrea var. finnmarchica Grunow in Cleve & Grunow 1880 |
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| Nitzschia vitrea var. genuina Grunow in Cleve & Grunow 1880 |
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| Nitzschia vitrea var. kerguelensis Grunow in Cleve & Grunow 1880 |
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| Nitzschia vitrea var. major Grunow in Cleve & Grunow 1880 |
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| Nitzschia vivax var. hyperborea Grunow in Cleve & Grunow 1880 |
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| Odontodiscus granulosus Grunow in Cleve & Grunow 1880 |
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| Odontodiscus hyalinus Grunow in Cleve & Grunow 1880 |
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