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Acta Botanica Croatica

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First report of Navicula jakovljevicii Hustedt (Bacillariophyta) from Hungary: distribution, comparative morphology and a related species

Viktória B-Béres
  • Corresponding author
  • Environmental Protection and Nature Conservation Authority, Trans-Tisza Region, Debrecen, Hatvan u. 16. H-4025 Hungary
  • Email:
/ István Bácsi
  • University of Debrecen, Department of Hydrobiology, Debrecen, Egyetem tér 1. H-4032 Hungary
/ Enikő T-Krasznai
  • Environmental Protection and Nature Conservation Authority, Trans-Tisza Region, Debrecen, Hatvan u. 16. H-4025 Hungary
/ Zsuzsanna Kókai
  • Environmental Protection and Nature Conservation Authority, Trans-Tisza Region, Debrecen, Hatvan u. 16. H-4025 Hungary
/ Krisztina Buczkó
  • Hungarian Natural History Museum, Budapest, Könyves Kálmán krt. 40. H-1476 Hungary
Published Online: 2015-11-06 | DOI: https://doi.org/10.1515/botcro-2015-0027


In Hungary Navicula jakovljevicii was firstly recorded in biofilm of Elodea nuttallii in 2005 in an oxbow of the catchment area of the River Danube. Subsequently, in 2006, N. jakovljevicii was also found in the same oxbow on reed stems as well. In the following years it appeared in another oxbow, suggesting an expanding distribution in the tributaries of the Danube in Hungary. The Hungarian population can be characterised as having mixed morphological features in comparison with other known N. jakovljevicii populations of Europe. When the morphological study was expanded, a similar, but 'giant form' was detect ed in fossil material. We found similarities and a possible connection between N. jakovljevicii and Navicula lucida, a diatom taxon described from a Neogene deposit in the Carpathian Basin. Despite the morphological similarities in the shape, apices, striae pattern and raphe structure of these two species, there are significant differences in valve dimensions: the valves of N. lucida are larger and more heavily silicified than N. jakovljevicii.

This article offers supplementary material which is provided at the end of the article.

Keywords: biofilm; Danube; Elodea nuttalli; Navicula jakovljevicii; Navicula lucida; oxbow; Pantocsek collection


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About the article

Published Online: 2015-11-06

Published in Print: 2015-10-01

Citation Information: Acta Botanica Croatica, ISSN (Online) 0365-0588, DOI: https://doi.org/10.1515/botcro-2015-0027. Export Citation

© by Viktória B-Béres. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. (CC BY-NC-ND 4.0)

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