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Title
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Observations on the diatom **Navicula hedinii** Hustedt (Bacillariophyceae) and its transfer to a new genus **Envekadea** Van de Vijver **et al.** gen. nov.
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Author
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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European journal of phycology. - London
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Publication
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London
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2009
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ISSN
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0967-0262
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DOI
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10.1080/09670260802389783
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Volume/pages
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44
:1
(2009)
, p. 123-138
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ISI
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000264137600009
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Full text (Publisher's DOI)
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