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Reinvestigation of West African Surirellaceae (Bacillariophyta) described by Woodhead and Tweed from Sierra Leone

Christine Cocquyt, Ingrid Jüttner, Wolf-Henning Kusber
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Journal Article
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Microscope slides containing material from Sierra Leone used by Woodhead and Tweed to describe eight new Surirellaceae taxa in the mid-twentieth century were reinvestigated. Only two taxa were found on the original slides, Surirella approximataWoodhead & Tweed and S. engleri [var. constricta]f. minor Woodhead & Tweed. The valve variability of S. engleri O. Müller includes valves of S. engleri [var. constricta]f. minor which is now regarded as a synonym. As no holotypes were indicated by the authors, types are given here. Comments on S. rudis var. sierra-leonensis Woodhead & Tweed, S. rudis [var. sierra-leonensis]f. constricta Woodhead & Tweed and S. esamangensis Foged are also given. Valves resembling Stenopterobia recta Woodhead & Tweed, Surirella asperrima f. rokuprensis Woodhead&Tweed, S. engleri f. sierra-leonensisWoodhead&Tweed and S. rokuprensisWoodhead&Tweed could not be found on the Woodhead and Tweed original slides.

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