| WebNameShort | |
| Achnanthes africana Woodhead & Tweed 1958 |
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| Achnanthes maranda Woodhead & Tweed 1958 |
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| Cymbella calida Woodhead & Tweed 1958 |
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| Cymbella hybrida var. sierra-leonensis (sierraleonensis) Woodhead & Tweed 1958 |
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| Cymbella ventricosa f. minus (sensu A. Mayer) Woodhead & Tweed 1958 |
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| Cymbella ventricosa f. minus Woodhead & Tweed 1958 |
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| Eunotia chigara Woodhead & Tweed 1958 |
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| Eunotia zanonii Woodhead & Tweed 1958 |
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| Fragilaria strangulata f. constricta Woodhead & Tweed 1958 |
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| Gomphonema migmatitum Woodhead & Tweed 1958 |
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| Gomphonema sonfonense Woodhead & Tweed 1958 |
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| Navicula submuticoides Woodhead & Tweed 1958 |
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| Navicula subtilissima f. rostrata Woodhead & Tweed 1958 |
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| Navicula sunkonensis Woodhead & Tweed 1958 |
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| Pinnularia hilseana f. undulata Woodhead & Tweed 1958 |
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| Pinnularia millsii Woodhead & Tweed 1958 |
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| Pinnularia pseudobrandelii Woodhead & Tweed 1958 |
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| Pinnularia seliana Woodhead & Tweed 1958 |
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| Pinnularia sierraleonensis (sierra-leonensis) Woodhead & Tweed 1958 |
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| Pinnularia smithii f. subparallela Woodhead & Tweed 1958 |
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| Pinnularia sonfonensis Woodhead & Tweed 1958 |
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| Stenopterobia recta Woodhead & Tweed 1958 |
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| Surirella (Suriraya) approximata Woodhead & Tweed 1958 |
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| Surirella (Suriraya) engleri f. sierraleonensis Woodhead & Tweed 1958 |
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