| WebNameShort | |
| Achnanthes jacksonii Woodhead & Tweed 1960 |
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| Achnanthes pusilla Woodhead & Tweed 1960 |
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| Campylosira cymbelliformis var. producta Woodhead & Tweed 1960 |
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| Cocconeis disculus f. multistriata Woodhead & Tweed 1960 |
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| Coscinodiscus decrescens f. minor Woodhead & Tweed 1960 |
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| Cymbella punctata Woodhead & Tweed 1960 |
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| Eunotia lineolata f. minor Woodhead & Tweed 1960 |
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| Eunotia margaritata Woodhead & Tweed 1960 |
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| Fragilaria leptostauron var. stauroneiformis Woodhead & Tweed 1960 |
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| Frustulia suspecta (Frenguelli) Woodhead & Tweed 1960 |
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| Frustulia suspecta var. obtusa (Frenguelli) Woodhead & Tweed 1960 |
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| Gomphocymbella sierraleonensis (sierra-leonensis) Woodhead & Tweed 1960 |
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| Hemiaulus longispinosus Woodhead & Tweed 1960 |
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| Navicula kaikonkiensis Woodhead & Tweed 1960 |
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| Navicula kolentiensis Woodhead & Tweed 1960 |
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| Neidium kozlowi (koslowi, koslowii) var. sierraleonensis Woodhead & Tweed 1960 |
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| Nitzschia kaikonkiensis Woodhead & Tweed 1960 |
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| Nitzschia ralfsii Woodhead & Tweed 1960 |
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| Nitzschia sierraleonensis (sierra-leonensis) Woodhead & Tweed 1960 |
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| Pinnularia van heurckii Woodhead & Tweed 1960 |
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