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IMA Fungus. 2011 Dec;2(2):173-5. doi: 10.5598/imafungus.2011.02.02.08. Epub 2011 Nov 11.

Validation and justification of the phylum name Cryptomycota phyl. nov.

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  • 1School of Biosciences, University of Exeter, Exeter EX4 4QD, UK;


The recently proposed new phylum name Cryptomycota phyl. nov. is validly published in order to facilitate its use in future discussions of the ecology, biology, and phylogenetic relationships of the constituent organisms. This name is preferred over the previously tentatively proposed "Rozellida" as new data suggest that the life-style and morphology of Rozella is not representative of the large radiation to which it and other Cryptomycota belong. Furthermore, taxa at higher ranks such as phylum are considered better not based on individual names of included genera, but rather on some special characteristics - in this case the cryptic nature of this group and that they were initially revealed by molecular methods rather than morphological discovery. If the group were later viewed as a member of a different kingdom, the name should be retained to indicate its fungal affinities, as is the practice for other fungal-like protist groups.


Fungi; Rozella; Rozellida; chitin; chytrid; phylogeny

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