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Title

Austrostigmidium, a new austral genus of lichenicolous fungi close to rock-inhabiting meristematic fungi in Teratosphaeriaceae fungi close to rock-inhabiting meristematic fungi in Teratosphaeriaceae

AuthorsPérez-Ortega, Sergio; Garrido-Benavent, Isaac; Ríos, Asunción de los
KeywordsAntarctica
Capnodiales
Dothideomycetes
Lichen
Lifestyle switch
Phylogenetic analysis
Symbiosis
Ultrastructure
Issue DateMay-2015
PublisherCambridge University Press
British Lichen Society
CitationLichenologist 47(3): 143-156 (2015)
AbstractThe new genus of lichenicolous fungi Austrostigmidium is described from Antarctica and Tierra del Fuego (Chile). It is characterized by the presence of black pseudothecia, pseudoparaphyses, fissitunicate, I-,KI asci and 3-septate hyaline ascospores. So far, the only known species grows on Mastodia tessellata (Verrucariales, Eurotiomycetes). The new genus is compared with anatomically close genera. Based on nuLSU and nuSSU markers we inferred its phylogenetic relationships and found that it belongs to the family Teratosphaeriaceae (Capnodiales, Dothideomycetes) and is closely related to rock-inhabiting fungal species, as well as to the hyphomycetous lichenicolous fungus Xanthoriicola. Finally, the host-parasite interface has been analyzed by means of transmission electron microscopy and fluorescence microscopy in order to describe the interactions among the new fungus and the symbionts forming the host lichen.
DescriptionAccepted for publication: 19 December 2014
Publisher version (URL)http://dx.doi.org/10.1017/S0024282915000031
URIhttp://hdl.handle.net/10261/117633
DOI10.1017/S0024282915000031
ISSN0024-2829
E-ISSN1096-1135
Appears in Collections:(MNCN) Artículos
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