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Two new European species from the heterogeneous Caloplaca holocarpa group (Teloschistaceae)

Published online by Cambridge University Press:  12 December 2011

Jan VONDRÁK ,
Alexander KHODOSOVTSEV ,
Jaroslav ŠOUN  and
Olga VONDRÁKOVÁ
Jan VONDRÁK
Affiliation:
Institute of Botany, Academy of Sciences, Zámek 1, CZ-252 43 Průhonice, Czech Republic. Email: [email protected]
Alexander KHODOSOVTSEV
Affiliation:
Kherson State University, 40 Rokiv Zhovtnya str. 27, UK-730 00 Kherson, Ukraine.
Jaroslav ŠOUN
Affiliation:
Department of Botany, Faculty of Science, University of South Bohemia, Branišovská 31, CZ-370 05 České Budějovice, Czech Republic.
Olga VONDRÁKOVÁ
Affiliation:
Institute of Steppe (Urals Branch of Russian Academy of Sciences), Pionerskaya st. 11, RF-460000 Orenburg, Russia.
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Abstract

The Caloplaca holocarpa group contains members of the family Teloschistaceae with a strongly reduced thallus and conspicuous yellow, orange or red apothecia. In the absence of well-defined thallus characters, taxa of this group must be identified mainly by apothecial characters and are as a result often difficult to separate. The species of this group have been shown not to form a monophyletic entity, with representatives of other Teloschistaceae with more complex thalli intermixed among them. Caloplaca skii and C. syvashica are recognized here as two homogeneous clades with Caloplaca holocarpa-like phenotypes. Caloplaca skii, which is widespread in southern Europe, resembles C. cerinelloides but is distinguished by its smaller and narrower ascospores and by growing predominantly on xerophilous shrubs. Caloplaca syvashica is restricted to shrubs in salt marshes in the northern Black Sea region. It is similar to the British Caloplaca suaedae and Australian C. yarraensis, but differs from both, mainly in ascospore characters. Caloplaca yarraensis is closely related to the new C. syvashica but arguments against their conspecificity are emphasised. A key for epiphytic C. holocarpa-like Teloschistaceae from Europe is provided.

Keywords

convergencecryptic biodiversitylichenized fungiphylogenytaxonomythallus simplification
Type
Research Article
Information
The Lichenologist , Volume 44 , Issue 1 , January 2012 , pp. 73 - 89
Copyright
Copyright © British Lichen Society 2011

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