Original paper

Morphological observations on Vikingea gibbocalyx (Brun) Witkowski, Lange-Bertalot Metzeltin (Bacillariophyta)

Vande Vijver, Bart; Riaux-Gobin, Catherine; Compère, Pierre

Nova Hedwigia Band 89 Heft 1-2 (2009), p. 263 - 279

published: Jul 30, 2009

DOI: 10.1127/0029-5035/2009/0089-0263

BibTeX file

ArtNo. ESP050008901015, Price: 29.00 €

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Light (LM) and scanning electron (SEM) microscope observations of Vikingea gibbocalyx (Brun) Witkowski, Lange-Bertalot et Metzeltin, from coral sands off Réunion (Indian Ocean), are presented. The species is illustrated with a particular focus on new, or previously poorly documented, morphological details such as the raised external ridges, the structure of the girdle and the structure of the areolae with typical disc-like coverings. In the middle of the valve, near the margin, two central-marginal circular structures are observed. The fine architecture of the central-marginal circular structures and the areolae are examined. The biogeography of the taxon is discussed taking into account all observations in the literature.