Exophiala atacamensis, sp. nov., and E. crusticola from the Atacama Desert, northern Chile
Hugo Madrid, Josepa Gené, Luis Quijada, Taimy Cantillo, Rodrigo Gacitúa, Jorge Valdés, Carolina Sánchez, Francesc Xavier Prenafeta-Boldú, Nalin Wijayawardene, Víctor Silva & Patricio Godoy
Sydowia 75: 181-192
Published online on February 7th, 2023
In the course of a taxonomic survey on hyphomycetes from the Atacama Desert, four strains of slow-growing, cycloheximidetolerant
dematiaceous fungi were obtained from soil samples. These isolates presented a blastic conidiogenous apparatus and
yeast-like budding cells typical of the genus Exophiala. DNA sequence analyses of the internal transcribed spacer region and
partial large subunit ribosomal RNA gene revealed the presence of a novel species, Exophiala atacamensis, and a new record, E.
crusticola. Exophiala atacamensis is phylogenetically distant from other members of Exophiala and is morphologically characterized
by the production of annellidic conidiogenous cells, aseptate conidia in slimy masses, yeast-like budding cells, and abundant
brown, meristematic, thick-walled bodies. This study reports E. crusticola for the first time in the Southern Hemisphere.
Keywords: Black yeasts, Chaetothyriales, Herpotrichiellaceae, phylogeny, taxonomy.
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