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New Cocconeis taxa from coral sands off Reunion Island (Western Indian Ocean)
Riaux-Gobin, C.; Compere, P. (2008). New Cocconeis taxa from coral sands off Reunion Island (Western Indian Ocean). Diatom Research 23(1): 129-146
In: Diatom Research. Taylor & Francis: Bristol Avon. ISSN 0269-249X; e-ISSN 2159-8347, meer
Peer reviewed article  

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Trefwoorden
    Cocconeis C.G. Ehrenberg, 1837 [WoRMS]; Marien
Author keywords
    diatom flora; Cocconeis; coral sands; fringing reefs; Reunion Island;

Auteurs  Top 
  • Riaux-Gobin, C.
  • Compere, P., meer

Abstract
    Coral sands and affiliated environments off the Reunion Island (Mascarene archipelago, Western Indian Ocean) are inhabited by diversified diatom communities. The Monoraphidineae taxa are particularly numerous. A preliminary survey (June 2005) of coral sands from the fringing reefs "Ferme Corail", "St Leu" and "1'Herillitage", has made it possible to observe and describe four new species pertaining to the genus Cocconeis Ehrenberg. The larger one, Cocconeis alucitae, is closely related to C. scutellum Ehrenberg but shows a striking sternum valve (SV) valvocopula with long and thin fimbriae proximately joined in a median-valve ring, and short chambers on the internal face of the SV. C. coralliensis, C. borbonica and C. mascarenica are smaller taxa, close to C. molesta Kutzing, C. finmarchica Grunow and C. neothumensis Krammer respectively, but with differences in their valves ornamentation, particularly in striation, denser than in the mentioned taxa. This paper presents light (LM) and scanning electron microscopic (SEM) observations for each taxon and comparison with similar or relevant taxa.

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