Title
Observations on the diatom **Navicula hedinii** Hustedt (Bacillariophyceae) and its transfer to a new genus **Envekadea** Van de Vijver **et al.** gen. nov. Observations on the diatom **Navicula hedinii** Hustedt (Bacillariophyceae) and its transfer to a new genus **Envekadea** Van de Vijver **et al.** gen. nov.
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
London ,
Subject
Biology
Source (journal)
European journal of phycology. - London
Volume/pages
44(2009) :1 , p. 123-138
ISSN
0967-0262
ISI
000264137600009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
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