A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina
Abstract Lichens of the Ramalina siliquosa complex dominate seashore cliffs in Europe and South-East Asia, but their taxonomy has been vigorously debated for over a century. On many cliffs, they exhibit a bewildering zonation of chemotypes that resembles the classic zonation of organisms that occupy...
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crcambridgeupr:10.1017/s0024282920000110 2024-05-19T07:43:01+00:00 A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina LaGreca, Scott Lumbsch, H. Thorsten Kukwa, Martin Wei, Xinli Han, Jeong Eun Moon, Kwang Hee Kashiwadani, Hiroyuki Aptroot, André Leavitt, Steven D. 2020 http://dx.doi.org/10.1017/s0024282920000110 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282920000110 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms The Lichenologist volume 52, issue 3, page 197-211 ISSN 0024-2829 1096-1135 journal-article 2020 crcambridgeupr https://doi.org/10.1017/s0024282920000110 2024-04-25T06:51:37Z Abstract Lichens of the Ramalina siliquosa complex dominate seashore cliffs in Europe and South-East Asia, but their taxonomy has been vigorously debated for over a century. On many cliffs, they exhibit a bewildering zonation of chemotypes that resembles the classic zonation of organisms that occupy the littoral zone below. Do the chemotypes represent separate species, or infraspecific variation? To better understand the systematics of this group, sequences from four genetic loci (ITS, IGS, RPB1 and RPB2 ) were obtained for 59 samples from Denmark, France, Iceland, Norway, UK, Japan and Korea, including all major chemotypes. Maximum likelihood analysis of these sequences, together with sequences from 36 other Ramalina species, reveals that the complex comprises two distinct phylogenetic lineages, each including multiple chemotypes. These two putative species-level lineages correspond to the currently accepted taxa R. cuspidata and R. siliquosa . There is no evidence that these two taxa are phylogenetic sister species. Consequently, the explanation of this chemotype complex as an example of ‘sibling speciation’ is rejected. Specimens traditionally called ‘ R . siliquosa ’ from South-East Asia form a third clade, identified here as R . semicuspidata , with an additional, divaricatic acid chemotype. Other results include a robustly supported clade of Ramalina species that produce medullary depsides and depsidones; this clade includes another well-supported clade of south-eastern United States coastal plain and tropical Ramalina species. By contrast, large, strap-shaped Ramalina species that lack medullary depsides and depsidones occur in separate lineages. In addition, close relationships between the following groups of species are indicated: R. farinacea with R. subfarinacea R . fraxinea with R. leptocarpha , R. menziesii and R. subleptocarpha R. sinensis with R. unifolia . Furthermore, a new, variolaric acid-only chemotype is reported for R . farinacea , and a new, acid-deficient chemotype is reported for a ... Article in Journal/Newspaper Iceland Cambridge University Press The Lichenologist 52 3 197 211 |
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Cambridge University Press |
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English |
description |
Abstract Lichens of the Ramalina siliquosa complex dominate seashore cliffs in Europe and South-East Asia, but their taxonomy has been vigorously debated for over a century. On many cliffs, they exhibit a bewildering zonation of chemotypes that resembles the classic zonation of organisms that occupy the littoral zone below. Do the chemotypes represent separate species, or infraspecific variation? To better understand the systematics of this group, sequences from four genetic loci (ITS, IGS, RPB1 and RPB2 ) were obtained for 59 samples from Denmark, France, Iceland, Norway, UK, Japan and Korea, including all major chemotypes. Maximum likelihood analysis of these sequences, together with sequences from 36 other Ramalina species, reveals that the complex comprises two distinct phylogenetic lineages, each including multiple chemotypes. These two putative species-level lineages correspond to the currently accepted taxa R. cuspidata and R. siliquosa . There is no evidence that these two taxa are phylogenetic sister species. Consequently, the explanation of this chemotype complex as an example of ‘sibling speciation’ is rejected. Specimens traditionally called ‘ R . siliquosa ’ from South-East Asia form a third clade, identified here as R . semicuspidata , with an additional, divaricatic acid chemotype. Other results include a robustly supported clade of Ramalina species that produce medullary depsides and depsidones; this clade includes another well-supported clade of south-eastern United States coastal plain and tropical Ramalina species. By contrast, large, strap-shaped Ramalina species that lack medullary depsides and depsidones occur in separate lineages. In addition, close relationships between the following groups of species are indicated: R. farinacea with R. subfarinacea R . fraxinea with R. leptocarpha , R. menziesii and R. subleptocarpha R. sinensis with R. unifolia . Furthermore, a new, variolaric acid-only chemotype is reported for R . farinacea , and a new, acid-deficient chemotype is reported for a ... |
format |
Article in Journal/Newspaper |
author |
LaGreca, Scott Lumbsch, H. Thorsten Kukwa, Martin Wei, Xinli Han, Jeong Eun Moon, Kwang Hee Kashiwadani, Hiroyuki Aptroot, André Leavitt, Steven D. |
spellingShingle |
LaGreca, Scott Lumbsch, H. Thorsten Kukwa, Martin Wei, Xinli Han, Jeong Eun Moon, Kwang Hee Kashiwadani, Hiroyuki Aptroot, André Leavitt, Steven D. A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina |
author_facet |
LaGreca, Scott Lumbsch, H. Thorsten Kukwa, Martin Wei, Xinli Han, Jeong Eun Moon, Kwang Hee Kashiwadani, Hiroyuki Aptroot, André Leavitt, Steven D. |
author_sort |
LaGreca, Scott |
title |
A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina |
title_short |
A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina |
title_full |
A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina |
title_fullStr |
A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina |
title_full_unstemmed |
A molecular phylogenetic evaluation of the Ramalina siliquosacomplex, with notes on species circumscription and relationships within Ramalina |
title_sort |
molecular phylogenetic evaluation of the ramalina siliquosacomplex, with notes on species circumscription and relationships within ramalina |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/s0024282920000110 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282920000110 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
The Lichenologist volume 52, issue 3, page 197-211 ISSN 0024-2829 1096-1135 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0024282920000110 |
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The Lichenologist |
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52 |
container_issue |
3 |
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197 |
op_container_end_page |
211 |
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1799482722083667968 |