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Further expansion of morphological variability in the Porinaceae (Ascomycota, Ostropales) with the placement of the enigmatic genus Gallaicolichen

Published online by Cambridge University Press:  30 May 2024

Elise Lebreton Open the ORCID record for Elise Lebreton [Opens in a new window] ,
Damien Ertz Open the ORCID record for Damien Ertz [Opens in a new window] ,
Robert Lücking Open the ORCID record for Robert Lücking [Opens in a new window] ,
Antoine Simon Open the ORCID record for Antoine Simon [Opens in a new window] ,
Clifford Smith  and
Emmanuël Sérusiaux Open the ORCID record for Emmanuël Sérusiaux [Opens in a new window]
Elise Lebreton*
Affiliation:
Biology, Evolution, Conservation, Inbios Research Center, University of Liège, Quartier Vallée 1, B-4000 Liège, Belgium
Damien Ertz
Affiliation:
Department of Research, Meise Botanic Garden, B-1860 Meise, Belgium Service Général de l'Enseignement Supérieur et de la Recherche Scientifique, Fédération Wallonie-Bruxelles, B-1080 Bruxelles, Belgium
Robert Lücking
Affiliation:
Botanischer Garten und Botanisches Museum, Freie Universität Berlin, 14195 Berlin, Germany
Antoine Simon
Affiliation:
Natural History Museum, University of Oslo, NO-0318 Oslo, Norway Department of Botany, Swedish Museum of Natural History, SE-104 05 Stockholm, Sweden;
Clifford Smith
Affiliation:
Department of Botany, University of Hawaii at Manoa, Honolulu, HI 96822, USA
Emmanuël Sérusiaux
Affiliation:
Biology, Evolution, Conservation, Inbios Research Center, University of Liège, Quartier Vallée 1, B-4000 Liège, Belgium
*
Corresponding author: Elise Lebreton; Email: [email protected]
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Abstract

The foliicolous lichen Gallaicolichen pacificus exhibits unique goniocystangia-like structures named peltidiangia and peltidia. Its taxonomic classification within the Ascomycota has been unclear due to the absence of ascomata and lack of molecular data. Here we clarify the phylogenetic affinities of Gallaicolichen pacificus by analyzing mitochondrial small subunit ribosomal RNA (mtSSU) sequences obtained from specimens collected in New Caledonia. Ascomata and ascospores of G. pacificus, previously unknown, are described and illustrated for the first time. The results from the molecular and morphological analyses clearly indicate that Gallaicolichen pacificus belongs to the Porinaceae and is closely related to Porina guianensis. This is a remarkable extension of the already known, wide morphological diversity of thalli and diaspores produced within this family.

Keywords

AustralasiafoliicolousgoniocystangialichenNew Caledoniapeltidiangiaphylogeny
Type
Standard Paper
Information
The Lichenologist , Volume 56 , Issue 2-3 , May 2024 , pp. 61 - 71
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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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