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Phylogenetic relationships within the Fucales (Phaeophyceae) based on combined partial SSU+LSU rDNA sequence data

Published online by Cambridge University Press:  01 February 1999

FLORENCE ROUSSEAU
Affiliation:
Muséum National d'Histoire Naturelle, Laboratoire de Cryptogamie, Service commun de Systématique moléculaire, CNRS, GDR 1005, 12 rue Buffon, F-75005 Paris, France
BRUNO DE REVIERS
Affiliation:
Muséum National d'Histoire Naturelle, Laboratoire de Cryptogamie, Service commun de Systématique moléculaire, CNRS, GDR 1005, 12 rue Buffon, F-75005 Paris, France
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Abstract

Partial sequences of the large subunit (LSU) and small subunit (SSU) of the ribosomal DNA of fucalean algae (Phaeophyceae) from the northern and the southern hemispheres, as well as from other brown algal genera such as Durvillaea, were analysed and compared with available morphological data. Combined SSU+LSU sequence data appear to be suitable for inferring phylogenetic relationships within the Fucales. Results suggest that Durvillaea and Notheia should be included in the Fucales and that the paraphyletic Cystoseiraceae be merged into a large family, Sargassaceae Kützing emend. De Toni. The genus Axillariella, the taxonomic position of which was uncertain, clearly belongs to the Sargassaceae. At present, at least seven families are recognized in the order Fucales: Durvillaeaceae, Seirococcaceae, Notheiaceae, Sargassaceae, Himanthaliaceae, Hormosiraceae and Fucaceae. More investigations are needed to assess whether Xiphophora should be placed in its own family.

Type
Research Article
Copyright
© 1999 British Phycological Society

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