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DOI: 10.3852/08-194
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Mycologia, 101(5), 2009, pp. 696-706.
© 2009 by The Mycological Society of America

Rhizidium phycophilum, a new species in Chytridiales


Kathryn T. Picard 1
Peter M. Letcher
Martha J. Powell

     Department of Biological Sciences, The University of Alabama, Tuscaloosa, Alabama 35487

Molecular and ultrastructural investigations are revealing unrealized diversity among chytrids as the taxonomic revision of order Chytridiales (Chytridiomycota) progresses. During a biodiversity survey of soil-inhabiting chytrids in Australia an undescribed chytrid was isolated from a soil sample collected in a cool temperate rainforest of New South Wales, Australia. Combined zoospore ultrastructure analysis and molecular phylogenetic analyses of partial LSU rRNA and ITS1-5.8S-ITS2 sequences demonstrated this chytrid was a new species within Chytridiales and possessed distinctive zoospore architecture previously unknown. Herein we delineate a new Rhizidium species in Chytridiales based on molecular monophyly and unique subcellular organization of the zoospore.

Key words: chytrid, phylogeny, 28S rDNA, vesicles, zoospore

1 Corresponding author. E-mail: picar001{at}bama.ua.edu






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Copyright © 2009 by The Mycological Society of America.