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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.
- Source :
-
European Journal of Phycology . Feb2009, Vol. 44 Issue 1, p123-138. 16p. 8 Black and White Photographs, 1 Diagram, 2 Charts. - Publication Year :
- 2009
-
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]
- Subjects :
- *NAVICULACEAE
*ULTRASTRUCTURE (Biology)
*TAXONOMY
*DIATOMS
Subjects
Details
- Language :
- English
- ISSN :
- 09670262
- Volume :
- 44
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- European Journal of Phycology
- Publication Type :
- Academic Journal
- Accession number :
- 37140742
- Full Text :
- https://doi.org/10.1080/09670260802389783