Observations on the diatom Navicula hedinii Hustedt (Bacillariophyceae) and its transfer to a new genus Envekadea Van de Vijver et al. gen. nov.

Marija Gligora, Koraljka Kralj, Andelka Plenković-Moraj, Friedel Hinz, Eva Acs, Istvan Grigorszky, Christine Cocquyt, Bart van de Vijver

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13 Citations (Scopus)

Abstract

The population of an unknown naviculoid diatom from Lake Vrana in Croatia was identified as Navicula hedinii, a species described in 1922 from a small lake in eastern Turkestan (China). This species has some similarities with Navicula pseudocrassirostris, a marine species found in European coastal waters. Based on the ultrastructure of the two species, they can no longer be included within the taxonomical concept of Navicula sensu stricto. Following a comparative morphological analysis of both species with genera bearing similar characters (Adlafia, Veigaludwigia, Kobayasiella, Cavinula, Stenoneis, Climaconeis, Berkeleya, Sellaphora, Cosmioneis), a new genus, Envekadea is proposed for the two species. The new genus is characterized by a sigmoid raphe course with golfclub-like terminal fissures deflected in opposite directions, the areolae covered by external porous hymenes and the presence of one chloroplast, H-shaped in valve view.

Original languageEnglish
Pages (from-to)123-138
Number of pages16
JournalEuropean Journal of Phycology
Volume44
Issue number1
DOIs
Publication statusPublished - Feb 1 2009

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Keywords

  • Envekadea gen. nov.
  • Envekadea hedinii
  • Envekadea pseudocrassirostris
  • Naviculaceae
  • Taxonomy
  • Ultrastructure

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

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