Xerochrysium gen. nov. and Bettsia, genera encompassing xerophilic species of Chrysosporium

On the basis of a study of ITS sequences, Vidal et al. (Rev. Iber. Micol. 17: 22, 2000) recommended that the genus Chrysosporium be restricted to species belonging to Onygenales. Using nrLSU genes, we studied the majority of clades examined by Vidal et al. and showed that currently accepted species...

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Bibliographic Details
Published in:IMA fungus 2013-12, Vol.4 (2), p.229-241
Main Authors: Pitt, John I, Lantz, Henrik, Pettersson, Olga Vinnere, Leong, Su-Lin L
Format: Article
Language:English
Subjects:
Asexuality
Chrysosporium
Eurotiales
Genera
Microbiology
Mikrobiologi
Phylogenetics
Phylogeny
Polyethylene
Species
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Summary:On the basis of a study of ITS sequences, Vidal et al. (Rev. Iber. Micol. 17: 22, 2000) recommended that the genus Chrysosporium be restricted to species belonging to Onygenales. Using nrLSU genes, we studied the majority of clades examined by Vidal et al. and showed that currently accepted species in Chrysosporium phylogenetically belong in six clades in three orders. Surprisingly, the xerophilic species of Chrysosporium, long thought to be a single grouping away from the majority of Chrysosporium species, occupy two clades, one in Leotiales, the other in Eurotiales. Species accepted in Leotiales are related to the sexual genus Bettsia. One is the type species B. alvei, and related asexual strains classified as C. farinicola, the second is C. fastidium transferred to Bettsia as B. fastidia. Species in the Eurotiales are transferred to Xerochrysium gen. nov., where the accepted species are X. xerophilum and X. dermatitidis, the correct name for C. inops on transfer to Xerochrysium. All accepted species are extreme xerophiles, found in dried and concentrated foods.
ISSN:2210-6340
2210-6359
2210-6359
DOI:10.5598/imafungus.2013.04.02.08