1. Observations on the diatom Navicula hedinii Hustedt (Bacillariophyceae) and its transfer to a new genus Envekadea Van de Vijver et al. gen. nov.
- Author
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Gligora, Marija, Kralj, Koraljka, Plenković-Moraj, Anđelka, Hinz, Friedel, Acs, Eva, Grigorszky, Istvan, Cocquyt, Christine, and Van de Vijver, Bart
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NAVICULACEAE ,ULTRASTRUCTURE (Biology) ,TAXONOMY ,DIATOMS - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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