Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia
Abstract The genus Thelopsis was classified in the family Stictidaceae but its systematic position has never been investigated by molecular methods. In order to determine its family placement and to test its monophyly, fungal DNA of recent collections of Thelopsis specimens was sequenced. Phylogenet...
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crcambridgeupr:10.1017/s002428292000050x 2024-06-23T07:56:01+00:00 Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia Ertz, Damien Sanderson, Neil Lebouvier, Marc 2021 http://dx.doi.org/10.1017/s002428292000050x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002428292000050X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms The Lichenologist volume 53, issue 1, page 45-61 ISSN 0024-2829 1096-1135 journal-article 2021 crcambridgeupr https://doi.org/10.1017/s002428292000050x 2024-06-12T04:04:20Z Abstract The genus Thelopsis was classified in the family Stictidaceae but its systematic position has never been investigated by molecular methods. In order to determine its family placement and to test its monophyly, fungal DNA of recent collections of Thelopsis specimens was sequenced. Phylogenetic analyses using nuLSU, RPB 2 and mtSSU sequences reveal that members of Thelopsis form a monophyletic group within the genus Gyalecta as currently accepted. The placement of Thelopsis , including the generic type T. rubella , within the genus Gyalecta challenges the generic circumscription of this group because Thelopsis is well recognized by the combination of morphological characters: perithecioid ascomata, well-developed periphysoids, polysporous asci and small, few-septate ellipsoid-oblong ascospores. The sterile sorediate Opegrapha corticola is also placed in the Gyalectaceae as sister species to Thelopsis byssoidea + T. rubella . Ascomata of O. corticola are illustrated for the first time and support its placement in the genus Thelopsis . The hypothesis that O. corticola might represent the sorediate fertile morph of T. rubella is not confirmed because the species is phylogenetically and morphologically distinct. Thelopsis is recovered as polyphyletic, with T. melathelia being placed as sister species to Ramonia . The new combinations Thelopsis corticola (Coppins & P. James) Sanderson & Ertz comb. nov. and Ramonia melathelia (Nyl.) Ertz comb. nov. are introduced and a new species of Gyalecta , G. amsterdamensis Ertz, is described from Amsterdam and Saint-Paul Islands, characterized by a sterile thallus with discrete soralia. Petractis luetkemuelleri and P. nodispora are accommodated in the new genus Neopetractis , differing from the generic type ( P. clausa ) by having a different phylogenetic position and a different photobiont. Francisrosea bicolor Ertz & Sanderson gen. & sp. nov. is described for a sterile sorediate lichen somewhat similar to Opegrapha corticola but having an isolated ... Article in Journal/Newspaper Paul Islands Cambridge University Press Paul Islands ENVELOPE(-63.716,-63.716,-64.283,-64.283) Saint-Paul ENVELOPE(-57.715,-57.715,51.467,51.467) The Lichenologist 53 1 45 61 |
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Open Polar |
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Cambridge University Press |
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English |
description |
Abstract The genus Thelopsis was classified in the family Stictidaceae but its systematic position has never been investigated by molecular methods. In order to determine its family placement and to test its monophyly, fungal DNA of recent collections of Thelopsis specimens was sequenced. Phylogenetic analyses using nuLSU, RPB 2 and mtSSU sequences reveal that members of Thelopsis form a monophyletic group within the genus Gyalecta as currently accepted. The placement of Thelopsis , including the generic type T. rubella , within the genus Gyalecta challenges the generic circumscription of this group because Thelopsis is well recognized by the combination of morphological characters: perithecioid ascomata, well-developed periphysoids, polysporous asci and small, few-septate ellipsoid-oblong ascospores. The sterile sorediate Opegrapha corticola is also placed in the Gyalectaceae as sister species to Thelopsis byssoidea + T. rubella . Ascomata of O. corticola are illustrated for the first time and support its placement in the genus Thelopsis . The hypothesis that O. corticola might represent the sorediate fertile morph of T. rubella is not confirmed because the species is phylogenetically and morphologically distinct. Thelopsis is recovered as polyphyletic, with T. melathelia being placed as sister species to Ramonia . The new combinations Thelopsis corticola (Coppins & P. James) Sanderson & Ertz comb. nov. and Ramonia melathelia (Nyl.) Ertz comb. nov. are introduced and a new species of Gyalecta , G. amsterdamensis Ertz, is described from Amsterdam and Saint-Paul Islands, characterized by a sterile thallus with discrete soralia. Petractis luetkemuelleri and P. nodispora are accommodated in the new genus Neopetractis , differing from the generic type ( P. clausa ) by having a different phylogenetic position and a different photobiont. Francisrosea bicolor Ertz & Sanderson gen. & sp. nov. is described for a sterile sorediate lichen somewhat similar to Opegrapha corticola but having an isolated ... |
format |
Article in Journal/Newspaper |
author |
Ertz, Damien Sanderson, Neil Lebouvier, Marc |
spellingShingle |
Ertz, Damien Sanderson, Neil Lebouvier, Marc Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia |
author_facet |
Ertz, Damien Sanderson, Neil Lebouvier, Marc |
author_sort |
Ertz, Damien |
title |
Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia |
title_short |
Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia |
title_full |
Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia |
title_fullStr |
Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia |
title_full_unstemmed |
Thelopsis challenges the generic circumscription in the Gyalectaceae and brings new insights to the taxonomy of Ramonia |
title_sort |
thelopsis challenges the generic circumscription in the gyalectaceae and brings new insights to the taxonomy of ramonia |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/s002428292000050x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002428292000050X |
long_lat |
ENVELOPE(-63.716,-63.716,-64.283,-64.283) ENVELOPE(-57.715,-57.715,51.467,51.467) |
geographic |
Paul Islands Saint-Paul |
geographic_facet |
Paul Islands Saint-Paul |
genre |
Paul Islands |
genre_facet |
Paul Islands |
op_source |
The Lichenologist volume 53, issue 1, page 45-61 ISSN 0024-2829 1096-1135 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s002428292000050x |
container_title |
The Lichenologist |
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53 |
container_issue |
1 |
container_start_page |
45 |
op_container_end_page |
61 |
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1802648847488385024 |