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Three new Curvularia species from clinical and environmental sources

Isabel Iturrieta-González1, Josepa Gené1, Nathan Wiederhold2

  • 1Unitat de Micologia, Facultat de Medicina i Ciències de la Salut and IISPV, Universitat Rovira i Virgili, Reus, Spain.

Mycokeys
|July 2, 2020
PubMed

Insights

Three new species of Curvularia fungi were identified using DNA sequencing, addressing challenges in microscopic identification. This discovery expands our understanding of these pathogenic fungi found in soil, clinical, and plant samples.

Area of Science:

  • Mycology
  • Fungal Taxonomy
  • Molecular Biology

Background:

  • Curvularia is a diverse genus of fungi, including significant plant, animal, and human pathogens.
  • Microscopic identification of Curvularia species is challenging due to overlapping morphological characteristics.
  • Cryptic species within Curvularia have been increasingly identified through molecular methods.

Purpose of the Study:

  • To delineate and describe novel species within the Curvularia genus.
  • To utilize multi-locus sequence analysis for accurate fungal species identification.
  • To provide morphological characterization and illustration of newly identified Curvularia species.

Main Methods:

  • Multi-locus sequence analysis using rDNA ITS, gapdh, and tef1 gene regions.
  • Comparative morphological analysis of fungal isolates.
  • Isolation of fungi from diverse sources including soil, human clinical specimens, and plant material.

Main Results:

  • Three new Curvularia species are proposed: C. paraverruculosa, C. suttoniae, and C. vietnamensis.
  • C. paraverruculosa is distinguished by its narrower conidia compared to C. americana and C. verruculosa.
  • C. suttoniae and C. vietnamensis are closely related to C. petersonii but possess larger conidia.

Conclusions:

  • Molecular data, particularly DNA barcoding, is crucial for resolving cryptic species in the Curvularia genus.
  • The identification of these novel species enhances the taxonomic understanding of pathogenic fungi.
  • This study contributes valuable morphological and molecular data for Curvularia species identification.
Keywords:
AscomycetesPleosporaceaeDematiaceous hyphomycetesphylogenytaxonomy

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