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What is in a name? Terfezia classification revisited
Rogério Louro1, Celeste Santos-Silva1, Tânia Nobre2
1Biology Department, Macromycology Laboratory, Instituto de Ciências Agrárias e Ambientais Mediterrânicas, University of Évora, Évora, Portugal.
Fungal Biology
|April 1, 2019
Summary
This study clarifies the taxonomy of desert truffles (Terfezia genus) using molecular data, identifying 17 distinct lineages. A new key aids in distinguishing these ecologically and economically important fungi.
Area of Science:
- Mycology
- Plant Sciences
- Ecology
Background:
- Desert truffles (hypogeous Ascomycota) are ecologically and economically significant in arid regions.
- The genus Terfezia, known for its diversity, faces taxonomic challenges due to numerous new species and high intraspecific variability.
- Molecular techniques are essential for accurate specimen discrimination and identification within Terfezia.
Purpose of the Study:
- To reconstruct the phylogeny of the Terfezia genus using publicly available sequence data.
- To resolve pressing taxonomic issues, including the Terfezia leptoderma/olbiensis complex and misapplied synonymies.
- To develop an identification key for the Terfezia genus based on a resolved phylogeny and morphological/ecological data.
Main Methods:
- Compilation and analysis of public ITS sequence data for Terfezia species.
- Utilizing the custom-curated UNITE database for phylogenetic reconstruction.
- Comparative analysis of molecular data with morphological and ecological characteristics.
Main Results:
- Identification of at least 17 distinct lineages within the Terfezia genus.
- Resolution of taxonomic ambiguities, such as the T. leptoderma/olbiensis complex.
- Confirmation of numerous undescribed taxa requiring formal determination.
Conclusions:
- The resolved phylogeny provides a robust framework for Terfezia taxonomy.
- An identification key is proposed, emphasizing the integration of molecular, morphological, and ecological data.
- Accurate classification of Terfezia species is crucial for understanding their ecological roles and economic potential.
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