Lange-Bertalot, H. & Ulrich, S.: Contributions to the taxonomy of needle-shaped Fragilaria and Ulnaria species. Lange-Bertalot, H. & Hofmann, G.: Navigiolum silesiacum sp. n. (Bacillariophyta) a second record of this species-poor diatom genus for Central Europe. Krüger, W.: Die Kieselalgengesellschaften der Pfrimm, linksseitiger Zufluss des Oberrheins in Rheinland-Pfalz [The diatom associations of the river Pfrimm, a leftside tributary of the River Rhine in Rhineland-Palatinate/Germany]. Metzeltin, D. & Lange-Bertalot, H.: Pinnularia kurt-krammeri. A new diatom species from a fossil deposit in Scotland. Lange-Bertalot, H. & Metzeltin, D.: Pinnularia saprotolerans proposed as a species new to science from rivers in Central Europe and South Africa tolerating strongly polluted waters. Lange-Bertalot, H. & Werum, M.: Nitzschia rhombicolancettula sp. n. und Nitzschia vixpalea sp. n. Beschreibung von zwei neuen Arten benthischer Diatomeen (Bacillariophyta) aus der Weser nahe Porta Westfalica [Nitzschia rhombicolancettula sp. n. and Nitzschia vixpalea sp. n. Description of two benthic diatom species (Bacillariophyta) new to science from the Weser River gate "Porta Westphalica", NW Germany]. New taxa: Fragilaria tenuissima n. sp., Fragilaria perdelicatissima n. sp., Fragilaria grunowii n. sp., Fragilaria saxoplanctonica n. sp., Fragilaria aquaplus n. sp., Fragilaria longifusiformis eurofusiformis n. ssp., Fragilaria crotonensis lacus-vulcani n. ssp., Navigiolum silesiacum n. sp., Pinnularia kurt-krammeri n. sp., Pinnularia saprotolerans n. sp., Nitzschia rhombicolancettula n. sp., Nitzschia vixpalea n. sp.
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