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Phylogeny and Taxonomy of an Enigmatic Sterile Lichen

Crustose, asexually reproducing taxa represent a large component of lichen biodiversity that is often overlooked and underestimated; as a result, remarkable potential remains for discovery of new species in this neglected, polyphyletic group. For this study, ITS and mtSSU rDNA sequences were analyze... Full description

Journal Title: Systematic botany 2012-10, Vol.37 (4), p.835-844
Main Author: Hodkinson, Brendan P
Other Authors: Lendemer, James C
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: American Society of Plant Toxonomists
ID: ISSN: 0363-6445
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title: Phylogeny and Taxonomy of an Enigmatic Sterile Lichen
format: Article
creator:
  • Hodkinson, Brendan P
  • Lendemer, James C
subjects:
  • Ascomycota
  • Biodiversity
  • Biological taxonomies
  • Botany
  • Caloplaca
  • Data processing
  • Datasets
  • Genetic aspects
  • Heterogeneous Substitution Rates
  • Identification and classification
  • INAASE
  • Inflated Posterior Probabilities
  • Lichenology
  • Lichens
  • Long-Branch Attraction
  • New species
  • Nomenclature
  • Parsimony
  • Phylogenetics
  • Phylogeny
  • Physiological aspects
  • PICS-Ord
  • Plant genetics
  • Star-Tree Paradox
  • Taxa
  • Taxonomy
  • Teloschistaceae
  • Thalli
  • Thallus
ispartof: Systematic botany, 2012-10, Vol.37 (4), p.835-844
description: Crustose, asexually reproducing taxa represent a large component of lichen biodiversity that is often overlooked and underestimated; as a result, remarkable potential remains for discovery of new species in this neglected, polyphyletic group. For this study, ITS and mtSSU rDNA sequences were analyzed in conjunction with chemical and anatomical data to understand the systematic placement of an enigmatic, sterile lichen. This species, despite references in the literature, and being known for over half a decade, has remained undescribed due to our inability to integrate it into a higher-level taxonomic framework using morphology alone. Here we demonstrate the utility of a systematic methodology that combines molecular and non-molecular characters to place and circumscribe species of asexually reproducing lichens that are typically sterile. Based on our analyses, the new species, Caloplaca reptans, shows phylogenetic and morphological affinities to a broad group of Caloplaca species with gray thalli, including the type species of the genus, C. cerina. This study highlights that the family Teloschistaceae is morphologically more diverse than previously understood, and contains elements that cannot easily be placed in known ‘species groups.’
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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descriptionCrustose, asexually reproducing taxa represent a large component of lichen biodiversity that is often overlooked and underestimated; as a result, remarkable potential remains for discovery of new species in this neglected, polyphyletic group. For this study, ITS and mtSSU rDNA sequences were analyzed in conjunction with chemical and anatomical data to understand the systematic placement of an enigmatic, sterile lichen. This species, despite references in the literature, and being known for over half a decade, has remained undescribed due to our inability to integrate it into a higher-level taxonomic framework using morphology alone. Here we demonstrate the utility of a systematic methodology that combines molecular and non-molecular characters to place and circumscribe species of asexually reproducing lichens that are typically sterile. Based on our analyses, the new species, Caloplaca reptans, shows phylogenetic and morphological affinities to a broad group of Caloplaca species with gray thalli, including the type species of the genus, C. cerina. This study highlights that the family Teloschistaceae is morphologically more diverse than previously understood, and contains elements that cannot easily be placed in known ‘species groups.’
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subjectAscomycota ; Biodiversity ; Biological taxonomies ; Botany ; Caloplaca ; Data processing ; Datasets ; Genetic aspects ; Heterogeneous Substitution Rates ; Identification and classification ; INAASE ; Inflated Posterior Probabilities ; Lichenology ; Lichens ; Long-Branch Attraction ; New species ; Nomenclature ; Parsimony ; Phylogenetics ; Phylogeny ; Physiological aspects ; PICS-Ord ; Plant genetics ; Star-Tree Paradox ; Taxa ; Taxonomy ; Teloschistaceae ; Thalli ; Thallus
ispartofSystematic botany, 2012-10, Vol.37 (4), p.835-844
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abstractCrustose, asexually reproducing taxa represent a large component of lichen biodiversity that is often overlooked and underestimated; as a result, remarkable potential remains for discovery of new species in this neglected, polyphyletic group. For this study, ITS and mtSSU rDNA sequences were analyzed in conjunction with chemical and anatomical data to understand the systematic placement of an enigmatic, sterile lichen. This species, despite references in the literature, and being known for over half a decade, has remained undescribed due to our inability to integrate it into a higher-level taxonomic framework using morphology alone. Here we demonstrate the utility of a systematic methodology that combines molecular and non-molecular characters to place and circumscribe species of asexually reproducing lichens that are typically sterile. Based on our analyses, the new species, Caloplaca reptans, shows phylogenetic and morphological affinities to a broad group of Caloplaca species with gray thalli, including the type species of the genus, C. cerina. This study highlights that the family Teloschistaceae is morphologically more diverse than previously understood, and contains elements that cannot easily be placed in known ‘species groups.’
pubAmerican Society of Plant Toxonomists
doi10.1600/036364412X656536
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