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Candelariella ahtii (Candelariaceae, Ascomycota) – a new species of lichen from Central and North-East Asia, and a key to 8-spored Candelariella

Published online by Cambridge University Press:  12 December 2024

Lidia S. Yakovchenko Open the ORCID record for Lidia S. Yakovchenko [Opens in a new window]  and
Evgeny A. Davydov Open the ORCID record for Evgeny A. Davydov [Opens in a new window]
Lidia S. Yakovchenko*
Affiliation:
Federal Scientific Center of the East Asia Terrestrial Biodiversity FEB RAS, 690022 Vladivostok, Russia
Evgeny A. Davydov
Affiliation:
Altai State University, 656049 Barnaul, Russia
*
Corresponding author: Lidia S. Yakovchenko; Email: lidiyakovchenko@mail.ru
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Abstract

Candelariella ahtii Yakovchenko sp. nov. is described based on phenotypic and ITS nrDNA sequence data. The species, occurring on soil in the crevices and cracks of siliceous rocks, is characterized by its squamulose cushion-forming thallus of imbricate, rounded to weakly incised granules/squamules with a greenish yellow to pale yellow pulverulent upper surface, lecanorine apothecia with a plane to somewhat convex ochre-yellow disc and a permanent thick thalline margin, 8-spored asci and ellipsoid to narrowly ellipsoid ascospores with rounded ends, as well as a distribution in Central and North-East Asia. It is similar to Candelariella citrina but differs in having ascospores without attenuated ends and smaller squamules. Candelariella citrina is excluded from the lichen flora of Russia. A worldwide key to all known Candelariella species with 8-spored asci, including 41 names, is provided.

Keywords

Candelariella citrinaChinaMongoliaRussiaRussian Far Easttaxonomy
Type
Standard Paper
Information
The Lichenologist , Volume 56 , Special Issue 5: A Special Issue dedicated to Professor Teuvo Ahti , September 2024 , pp. 287 - 300
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Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of the British Lichen Society

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