title: Nomenclatural notes on Nadsoniella and the human opportunist black yeast genus Exophiala.
abstract: The opportunistic black yeast are particularly known through the genus Exophiala, characterised by annellidic budding cells. However, this phenotype is polyphyletic within the order Chaetothyriales. Seventeen generic names are available in the family Herpotrichiellaceae, one of which is Exophiala. Future taxonomy will be based on molecular phylogeny; each multi-species clade may qualify for one of these names. This paper focuses on the genus Nadsoniella, which is the oldest valid name in the Herpotrichiellaceae. Despite its exophiala-like phenotype, the type species of Nadsoniella clusters in the jeanselmei-clade, competing with the sympodial genus Rhinocladiella. In contrast, Exophiala competes with morphologically pronounced genera Thysanorea and Veronaea. Replacing the current phenotypic system for phylogenetic nomenclature requires highly stable phylogenies, which currently are not available.
authors.affiliation: Biological Sciences Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.|Biological Sciences Department, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia.|Botany and Microbiology Department, Faculty of Science, Cairo University, Giza, Egypt.
authors.forename: Tarek A A
authors.initials: TAA
authors.lastname: Moussa
authors.affiliation: Biological Sciences Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Hassan S
authors.initials: HS
authors.lastname: Al-Zahrani
authors.affiliation: Biological Sciences Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Naif M S
authors.initials: NMS
authors.lastname: Kadasa
authors.affiliation: CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands.|Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands.
authors.forename: Leandro F
authors.identifier: http://orcid.org/0000-0002-2529-0855
authors.initials: LF
authors.lastname: Moreno
authors.affiliation: CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands.
authors.forename: A H G
authors.initials: AHG
authors.lastname: Gerrits van den Ende
authors.affiliation: Biological Sciences Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.|CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands.|Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands.
authors.forename: G Sybren
authors.initials: GS
authors.lastname: de Hoog
authors.affiliation: CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands.|Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands.|Directorate General of Health Services, Ibri Hospital, Ministry of Health, Ibri, Oman.
authors.forename: Abdullah M S
authors.identifier: http://orcid.org/0000-0002-5206-2647
authors.initials: AMS
authors.lastname: Al-Hatmi
mesh_terms: D004271:DNA, Fungal / Q000235:genetics; D005093:Exophiala / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D006801:Humans; D003904:Mitosporic Fungi / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D021141:Nucleic Acid Amplification Techniques; D010802:Phylogeny; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
chemical_list: D004271:DNA, Fungal
keywords: black yeast; morphology; nomenclature; opportunists; phylogeny; taxon sampling