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Rhizocarpon smaragdulum, a new monosporic yellow-thalline species and some additional species of the genus Rhizocarpon from the Altai Mountains (Siberia)

Published online by Cambridge University Press:  19 September 2017

Evgeny A. DAVYDOV  and
Lidia S. YAKOVCHENKO
Evgeny A. DAVYDOV
Affiliation:
Altai State University - Herbarium (ALTB), Lenin Prosp. 61, Barnaul 656049, Russian Federation; Tigirek State Nature Reserve, Nikitina Str. 111, Barnaul 656043, Russian Federation. Email: eadavydov@yandex.ru
Lidia S. YAKOVCHENKO
Affiliation:
Federal Scientific Center of the East Asia Terrestrial Biodiversity FEB RAS, Vladivostok 690022, Russian Federation
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Abstract

Rhizocarpon smaragdulum Davydov & Yakovchenko sp. nov. is described and a phylogenetic analysis (ITS, mtSSU) is presented, confirming its distinctiveness and indicating a sister relationship with R. suomiense and R. subgeminatum. The species is unique among yellow Rhizocarpon species in having a single hyaline ascospore per ascus. The phylogenetic tree suggests that the number of ascospores per ascus has been reduced in Rhizocarpon more than once during the course of its evolution. Two new distributional records are also reported: Rhizocarpon atroflavescens is new for Siberia and R. norvegicum is new for the Altai Mountains. Rhizocarpon norvegicum in this region grows on rocks and is also lichenicolous on Acarospora bullata.

Keywords

AscomycotaAsialichenized funginew taxontaxonomyRhizocarpaceaeTuva
Type
Articles
Information
The Lichenologist , Volume 49 , Issue 5 , September 2017 , pp. 457 - 466
Copyright
© British Lichen Society, 2017 

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