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Tremella diploschistina (Tremellales, Basidiomycota, Fungi), a new lichenicolous species growing on Diploschistes

Published online by Cambridge University Press:  29 March 2012

A. M. MILLANES ,
M. WESTBERG ,
M. WEDIN  and
P. DIEDERICH
A. M. MILLANES
Affiliation:
Departamento de Biología y Geología, Universidad Rey Juan Carlos, E-28933 Móstoles, Spain. Email: [email protected]
M. WESTBERG
Affiliation:
Cryptogamic Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-10405 Stockholm, Sweden.
M. WEDIN
Affiliation:
Cryptogamic Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-10405 Stockholm, Sweden.
P. DIEDERICH
Affiliation:
Musée national d'histoire naturelle, 25 rue Munster, L-2160 Luxembourg
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Abstract

Several specimens of a lichen-inhabiting Tremella, inducing the formation of pale yellow, dark brown or black galls on species of Diploschistes, have been collected in three localities in Sweden and in one locality in the USA. Morphological and molecular studies confirm that this material represents a single species, which differs from other described Tremella species in the combination of gall morphology, basidium morphology, basidium and basidiospore sizes, presence of thick-walled hyphidia, and a different host-selection. We consequently describe this fungus as Tremella diploschistina sp. nov., on the basis of morphology and phylogenetic analyses of ITS and nLSU sequences. The phylogenetic analyses reveal that the fungus clearly belongs in Tremella, although the relationships with other species in the genus remain unclear.

Keywords

lichensmolecular phylogenytaxonomyTremellomycetes
Type
Research Article
Information
The Lichenologist , Volume 44 , Issue 3 , May 2012 , pp. 321 - 332
Copyright
Copyright © British Lichen Society 2012

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