Understanding the evolution of phenotypical characters in the Micarea prasina group (Pilocarpaceae) and descriptions of six new species within the group

Beata Guzow-Krzemińska , Emmanuël Sérusiaux , Pieter P. G. van den Boom , A. Maarten Brand , Annina Launis , Anna Łubek , Martin Kukwa

Abstract

Six new Micarea species are described from Europe. Phylogenetic analyses, based on three loci, i.e. mtSSU rDNA, Mcm7 and ITS rDNA and ancestral state reconstructions, were used to evaluate infra-group divisions and the role of secondary metabolites and selected morphological characters on the taxonomy in the M. prasina group. Two main lineages were found within the group. The Micarea micrococca clade consists of twelve species, including the long-known M. micrococca and the newly described M. microsorediata, M. nigra and M. pauli. Within this clade, most species produce methoxymicareic acid, with the exceptions of M. levicula and M. viridileprosa producing gyrophoric acid. The M. prasina clade includes the newly described M. azorica closely related to M. prasina s.str., M. aeruginoprasina sp. nov. and M. isidioprasina sp. nov. The species within this clade are characterised by the production of micareic acid, with the exception of M. herbarum which lacks any detectable substances and M. subviridescens that produces prasinic acid. Based on our reconstructions, it was concluded that the ancestor of the M. prasina group probably had a thallus consisting of goniocysts, which were lost several times during evolution, while isidia and soredia evolved independently at multiple times. Our research supported the view that the ancestor of M. prasina group did not produce any secondary substances, but they were gained independently in different lineages, such as methoxymicareic acid which is restricted to M. micrococca and allied species or micareic acid present in the M. prasina clade.
Author Beata Guzow-Krzemińska (FB / DPTNC)
Beata Guzow-Krzemińska,,
- Department of Plant Taxonomy and Nature Conservation
, Emmanuël Sérusiaux
Emmanuël Sérusiaux,,
-
, Pieter P. G. van den Boom
Pieter P. G. van den Boom,,
-
, A. Maarten Brand
A. Maarten Brand,,
-
, Annina Launis
Annina Launis,,
-
, Anna Łubek
Anna Łubek,,
-
, Martin Kukwa (FB / DPTNC)
Martin Kukwa,,
- Department of Plant Taxonomy and Nature Conservation
Journal seriesMycoKeys, ISSN 1314-4057, (A 20 pkt)
Issue year2019
No57
Pages1-30
Publication size in sheets1.45
Keywords in Englishancestral state reconstruction, lichenised fungi, morphology, mtSSU rDNA, secondary metabolites, taxonomy
ASJC Classification1110 Plant Science; 1105 Ecology, Evolution, Behavior and Systematics
DOIDOI:10.3897/mycokeys.57.33267
URL https://doi.org/10.3897/mycokeys.57.33267
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)20
ScoreMinisterial score = 20.0, 06-08-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.29; WoS Impact Factor: 2017 = 3.269 (2) - 2017=2.667 (5)
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