Abstract
The term ‘desert truffle’ can be applied to multiple edible hypogeous fungi growing in arid areas throughout the world. Defining what a hypogeous fungus is, and what arid lands are, is hence critical to delimit this ecological group. We choose to define ‘hypogeous’ fungi as those species with closed or ‘sequestrate’ globose fruiting bodies growing totally under soil surface or partially covered by it. The terms ‘truffle’ and ‘tuberoid’ are applied to Ascomycetes species presenting asci, while ‘false truffle’ and ‘gastroid’ are preferred for Basidiomycetes, to highlight their evolution from ‘agaricoid’ habit, regarded in some cases as an adaptation to dry environments. The most prominent genera of desert truffles are mentioned, and keys are proposed for their identification within the Ascomycetes, Basidiomycetes, and the former Glomeromycetes. The most critical morphological traits used for these keys are briefly discussed, and some images to illustrate the criteria are provided.
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Acknowledgements
We wish to express our gratitude to Luis Monje and Ángel Pueblas of the Department of Drawing and Scientific Photography at the Alcalá University for their help in the digital preparation of the photographs, to Celestino Gelpi and Miguel Ángel Sanz for kindly providing some images.
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Moreno, G., Alvarado, P., Manjón, J.L. (2014). Hypogeous Desert Fungi. In: Kagan-Zur, V., Roth-Bejerano, N., Sitrit, Y., Morte, A. (eds) Desert Truffles. Soil Biology, vol 38. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40096-4_1
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