Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae)
In the Northern Hemisphere, <i>Plagiothecium cavifolium</i> is currently one of the most widely distributed species. This taxon has been described as extremely variable for decades, but the reasons for this variability have not been investigated in detail. The analysis of original materi...
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MDPI AG
2022-08-01
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| author | Grzegorz J. Wolski Aneta Tylak William R. Buck |
| author_facet | Grzegorz J. Wolski Aneta Tylak William R. Buck |
| author_sort | Grzegorz J. Wolski |
| collection | DOAJ |
| description | In the Northern Hemisphere, <i>Plagiothecium cavifolium</i> is currently one of the most widely distributed species. This taxon has been described as extremely variable for decades, but the reasons for this variability have not been investigated in detail. The analysis of original materials and diagnoses, as well as a detailed analysis of the history of names considered as synonyms of <i>P. cavifolium</i> <i>sensu</i> <i>lato</i>, showed that in terms of qualitative and quantitative characteristics, a number of the names of this complex differ significantly from the diagnosis of <i>Hypnum cavifolium</i> (basionym of <i>P. cavifolium</i>). The most important features distinguishing individual taxa include: julaceous stems; imbricate leaves, their symmetry, concavity; serration of leaf apices; the length of the cells from the middle part of the leaf; and the orientation of the capsules. Thus, the research conducted within <i>P. cavifolium</i> <i>sensu</i> <i>lato</i> made it possible to distinguish seven separate taxa: <i>P. cavifolium</i> (= <i>P. cavifolium</i> <i>sensu stricto</i>), <i>P. flaccidum</i>, <i>P. tenue</i> (being a new combination), <i>P. ikegamii</i>, <i>P. subjulaceum</i>, <i>P. sakuraii</i> and <i>P. otii</i> (four resurrected species). In addition, the analysis of original materials and the diagnosis of several taxa allowed them to be excluded from the described complex, and here we propose their synonymization with other taxa, such as <i>P. longisetum</i> and <i>Hygrohypnum luridum</i>. Photographic documentation and a key to distinguishing species within the described complex are attached. For two names (<i>P. sakuraii</i> and <i>P. succulentum</i> var. <i>longifolium</i>) lectotypes are proposed. |
| first_indexed | 2024-03-09T13:34:40Z |
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| id | doaj.art-f5d8cc9d227a44ac882bc56899bfe45e |
| institution | Directory Open Access Journal |
| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-09T13:34:40Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-f5d8cc9d227a44ac882bc56899bfe45e2023-11-30T21:14:27ZengMDPI AGDiversity1424-28182022-08-0114863310.3390/d14080633Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae)Grzegorz J. Wolski0Aneta Tylak1William R. Buck2Department of Geobotany and Plant Ecology, Faculty of Biology and Environmental Protection, University of Lodz, ul. Banacha 12/16, 90-237 Lodz, PolandDepartment of Classical Philology, Faculty of Philology, University of Lodz, ul. Pomorska 171/173, 91-404 Lodz, PolandInstitute of Systematic Botany, The New York Botanical Garden, New York, NY 10458-5126, USAIn the Northern Hemisphere, <i>Plagiothecium cavifolium</i> is currently one of the most widely distributed species. This taxon has been described as extremely variable for decades, but the reasons for this variability have not been investigated in detail. The analysis of original materials and diagnoses, as well as a detailed analysis of the history of names considered as synonyms of <i>P. cavifolium</i> <i>sensu</i> <i>lato</i>, showed that in terms of qualitative and quantitative characteristics, a number of the names of this complex differ significantly from the diagnosis of <i>Hypnum cavifolium</i> (basionym of <i>P. cavifolium</i>). The most important features distinguishing individual taxa include: julaceous stems; imbricate leaves, their symmetry, concavity; serration of leaf apices; the length of the cells from the middle part of the leaf; and the orientation of the capsules. Thus, the research conducted within <i>P. cavifolium</i> <i>sensu</i> <i>lato</i> made it possible to distinguish seven separate taxa: <i>P. cavifolium</i> (= <i>P. cavifolium</i> <i>sensu stricto</i>), <i>P. flaccidum</i>, <i>P. tenue</i> (being a new combination), <i>P. ikegamii</i>, <i>P. subjulaceum</i>, <i>P. sakuraii</i> and <i>P. otii</i> (four resurrected species). In addition, the analysis of original materials and the diagnosis of several taxa allowed them to be excluded from the described complex, and here we propose their synonymization with other taxa, such as <i>P. longisetum</i> and <i>Hygrohypnum luridum</i>. Photographic documentation and a key to distinguishing species within the described complex are attached. For two names (<i>P. sakuraii</i> and <i>P. succulentum</i> var. <i>longifolium</i>) lectotypes are proposed.https://www.mdpi.com/1424-2818/14/8/633diagnosis<i>Hypnum cavifolium</i>new combinations<i>Plagiothecium</i> <i>flaccidum</i><i>P. ikegamii</i><i>P. otii</i> |
| spellingShingle | Grzegorz J. Wolski Aneta Tylak William R. Buck Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae) Diversity diagnosis <i>Hypnum cavifolium</i> new combinations <i>Plagiothecium</i> <i>flaccidum</i> <i>P. ikegamii</i> <i>P. otii</i> |
| title | Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae) |
| title_full | Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae) |
| title_fullStr | Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae) |
| title_full_unstemmed | Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae) |
| title_short | Revision of the <i>Plagiothecium cavifolium</i> complex (Bryophyta: Plagiotheciaceae) |
| title_sort | revision of the i plagiothecium cavifolium i complex bryophyta plagiotheciaceae |
| topic | diagnosis <i>Hypnum cavifolium</i> new combinations <i>Plagiothecium</i> <i>flaccidum</i> <i>P. ikegamii</i> <i>P. otii</i> |
| url | https://www.mdpi.com/1424-2818/14/8/633 |
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