Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota)
Xanthoparmelia (Parmeliaceae, Ascomycota) is the most species-rich genus of lichen-forming fungi. Species boundaries are based on morphological and chemical features, varying reproductive strategies and, more recently, molecular sequence data. The isidiate Xanthoparmelia mexicana group is common in...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Pensoft Publishers
2018-09-01
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| Series: | MycoKeys |
| Online Access: | https://mycokeys.pensoft.net/articles.php?id=26724 |
| _version_ | 1818350156002623488 |
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| author | Alejandrina Barcenas-Peña Steven D. Leavitt Jen-Pan Huang Felix Grewe H. Thorsten Lumbsch |
| author_facet | Alejandrina Barcenas-Peña Steven D. Leavitt Jen-Pan Huang Felix Grewe H. Thorsten Lumbsch |
| author_sort | Alejandrina Barcenas-Peña |
| collection | DOAJ |
| description | Xanthoparmelia (Parmeliaceae, Ascomycota) is the most species-rich genus of lichen-forming fungi. Species boundaries are based on morphological and chemical features, varying reproductive strategies and, more recently, molecular sequence data. The isidiate Xanthoparmelia mexicana group is common in arid regions of North and Central America and includes a range of morphological variation and variable secondary metabolites – salazinic or stictic acids mainly. In order to better understand the evolutionary history of this group and potential taxonomic implications, a molecular phylogeny representing 58 ingroup samples was reconstructed using four loci, including ITS, mtSSU, nuLSU rDNA and MCM7. Results indicate the existence of multiple, distinct lineages phenotypically agreeing with X. mexicana. One of these isidiate, salazinic acid-containing lineages is described here as a new species, X. pedregalensis sp. nov., including populations from xerophytic scrub vegetation in Pedregal de San Angel, Mexico City. X. mexicana s. str. is less isidiate than X. pedregalensis and has salazinic and consalazinic acid, occasionally with norstictic acid; whereas X. pedregalensis contains salazinic and norstictic acids and an unknown substance. Samples from the Old World, morphologically agreeing with X. mexicana, are only distantly related to X. mexicana s. str. Our results indicate that X. mexicana is likely less common than previously assumed and ongoing taxonomic revisions are required for isidiate Xanthoparmelia species. |
| first_indexed | 2024-12-13T18:17:21Z |
| format | Article |
| id | doaj.art-cd80d58ae476411f9bec089ac3ee4e65 |
| institution | Directory Open Access Journal |
| issn | 1314-4057 1314-4049 |
| language | English |
| last_indexed | 2024-12-13T18:17:21Z |
| publishDate | 2018-09-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | MycoKeys |
| spelling | doaj.art-cd80d58ae476411f9bec089ac3ee4e652022-12-21T23:35:49ZengPensoft PublishersMycoKeys1314-40571314-40492018-09-0140132810.3897/mycokeys.40.2672426724Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota)Alejandrina Barcenas-Peña0Steven D. Leavitt1Jen-Pan Huang2Felix Grewe3H. Thorsten Lumbsch4The Field MuseumBrigham Young UniversityThe Field MuseumThe Field MuseumThe Field MuseumXanthoparmelia (Parmeliaceae, Ascomycota) is the most species-rich genus of lichen-forming fungi. Species boundaries are based on morphological and chemical features, varying reproductive strategies and, more recently, molecular sequence data. The isidiate Xanthoparmelia mexicana group is common in arid regions of North and Central America and includes a range of morphological variation and variable secondary metabolites – salazinic or stictic acids mainly. In order to better understand the evolutionary history of this group and potential taxonomic implications, a molecular phylogeny representing 58 ingroup samples was reconstructed using four loci, including ITS, mtSSU, nuLSU rDNA and MCM7. Results indicate the existence of multiple, distinct lineages phenotypically agreeing with X. mexicana. One of these isidiate, salazinic acid-containing lineages is described here as a new species, X. pedregalensis sp. nov., including populations from xerophytic scrub vegetation in Pedregal de San Angel, Mexico City. X. mexicana s. str. is less isidiate than X. pedregalensis and has salazinic and consalazinic acid, occasionally with norstictic acid; whereas X. pedregalensis contains salazinic and norstictic acids and an unknown substance. Samples from the Old World, morphologically agreeing with X. mexicana, are only distantly related to X. mexicana s. str. Our results indicate that X. mexicana is likely less common than previously assumed and ongoing taxonomic revisions are required for isidiate Xanthoparmelia species.https://mycokeys.pensoft.net/articles.php?id=26724 |
| spellingShingle | Alejandrina Barcenas-Peña Steven D. Leavitt Jen-Pan Huang Felix Grewe H. Thorsten Lumbsch Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota) MycoKeys |
| title | Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota) |
| title_full | Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota) |
| title_fullStr | Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota) |
| title_full_unstemmed | Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota) |
| title_short | Phylogenetic study and taxonomic revision of the Xanthoparmelia mexicana group, including the description of a new species (Parmeliaceae, Ascomycota) |
| title_sort | phylogenetic study and taxonomic revision of the xanthoparmelia mexicana group including the description of a new species parmeliaceae ascomycota |
| url | https://mycokeys.pensoft.net/articles.php?id=26724 |
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