Neopetromyces gen. nov and an overview of teleomorphs of Aspergillus subgenus Circumdati

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    Abstract

    Species in the anamorph genus Aspergillus are associated with several teleomorphic genera in the Eurotiales and the most important mycotoxin producers are concentrated in Aspergillus subgenus Circumdati. A new genus, Neopetromyces, is proposed for the recently described Petromyces muricatus, because this species differs distinctly from the two other species, P. alliaceus and P. albertensis. Neopetromyces muricatus has flesh-coloured ascostromata and an anamorph in Aspergillus subgenus Circumdati section Circumdati, whereas other Petromyces species have black ascostromata and anamorphs in Aspergillus subgenus Circumdati section Flavi. The ascostromata of P. alliaceus and its synonym P. albertensis resemble those of A. flavus and A. nomius. Another species from section Circumdati, A. lanosus, is reassigned to section Flavi. All these taxa grow well at 37 degrees C, and produce kojic acid and nominine/aflavinines. Neopetromyces muricatus is morphologically similar to A. melleus and related species in Aspergillus subgenus Circumdati section Circumdati. This similarity is further supported by physiological similarities, low growth rates at 37 degrees C, and similarities in profiles of natural products. This new classification is in accord with DNA sequence data. Strains identified as A. melleus producing ochratoxin A proved to be the anamorph of N. muricatus, while no strains of A. melleus sensu stricto produced ochratoxin A. This is the first report on ochratoxin A production of N. muricatus. Ochratoxin A is thus produced by some species in both sections Flavi and Circumdati. Several options are discussed for integrating the taxonomy and nomenclature of anamorphs and teleomorphs that lack coincident generic concepts.
    Original languageEnglish
    JournalStudies in Mycology
    Volume45
    Pages (from-to)201-207
    ISSN0166-0616
    Publication statusPublished - 2000

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