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Related Experiment Video

Updated: Jun 25, 2026

Isolation of Culturable Yeasts and Molds from Soils to Investigate Fungal Population Structure

Isolation of Culturable Yeasts and Molds from Soils to Investigate Fungal Population Structure

Published on: May 27, 2022

What is a species in Aspergillus?

R A Samson¹, J Varga

¹CBS Fungal Biodiversity Centre, Utrecht, The Netherlands. r.samson@cbs.knaw.nl

Medical Mycology

|March 4, 2009

Summary

Defining new Aspergillus species requires evolutionary divergence evidence, including unique DNA markers. The polyphasic approach, combining genetic, morphological, and ecological data, is the gold standard for accurate species delimitation.

Area of Science:

Mycology
Microbial Taxonomy
Molecular Biology

Background:

Accurate species delimitation is crucial for understanding fungal diversity and interactions.
Traditional methods for Aspergillus species identification have limitations, especially for closely related taxa.
The need for standardized nomenclature and identification protocols is evident in mycology.

Purpose of the Study:

To discuss current species concepts applicable to Aspergillus and its teleomorphs.
To propose a standardized approach for the description and validation of new Aspergillus species.
To provide recommendations for nomenclature and identification to avoid confusion in clinical and research settings.

Main Methods:

Review of existing species concepts and their applicability to Aspergillus.

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Isolation of Culturable Yeasts and Molds from Soils to Investigate Fungal Population Structure

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Emphasis on the polyphasic approach integrating multilocus sequence data, morphology, physiology, and ecology.

Recommendation for sequencing multiple gene regions (e.g., ITS, calmodulin, beta-tubulin, actin) and database submission.

Main Results:

The polyphasic approach is proposed as the gold standard for Aspergillus species delimitation.
Evidence of evolutionary divergence, particularly unique DNA characters at multiple loci, is required for new species.
Dual naming for taxa with teleomorphs and the use of 'complex' for morphologically indistinguishable species are recommended.

Conclusions:

A robust protocol for naming new Aspergillus taxa is proposed, emphasizing type culture deposition.
Adherence to the 'List of Names in Current Use' is recommended for Aspergillus nomenclature.
Standardized methods are essential for reliable Aspergillus identification and classification, benefiting both research and clinical practice.