Jean-Yves Dubuisson, Adèle Nivart, Ehoarn Bidault, Vincent Deblauwe, Vincent Droissart, Narcisse G. Kamdem, Germinal Rouhan, Atsushi Ebihara, Timothée le Péchon
{"title":"非洲热带蕨类植物 Didymoglossum Desv.属(石蒜科,Polypodiidae)的多样性、分类和历史","authors":"Jean-Yves Dubuisson, Adèle Nivart, Ehoarn Bidault, Vincent Deblauwe, Vincent Droissart, Narcisse G. Kamdem, Germinal Rouhan, Atsushi Ebihara, Timothée le Péchon","doi":"10.1111/jse.12951","DOIUrl":null,"url":null,"abstract":"<p>The fern genus <i>Didymoglossum</i> (Hymenophyllaceae) is not so diverse in Africa with seven species at most. However, its local taxonomy is surprisingly still strongly debated, in particular within the <i>Didymoglossum erosum</i> complex interpreted either as a single polymorphic species or as a group of at least three distinct but morphologically very close taxa (<i>D. erosum</i>, <i>Didymoglossum chamaedrys</i>, and <i>Didymoglossum benlii</i>). Investigating these taxonomic issues and more generally the diversity of the genus in Africa and its origin, we conducted a complete anatomo–morphological analysis coupled with a molecular phylogenetic work based on <i>rbcL</i>. Our results support the recognition of all seven species, including <i>Didymoglossum robinsonii</i> that is likely distinct from the Neotropical <i>Didymoglossum reptans</i> to which the African populations were traditionally attributed. We here propose new characters and a novel key to distinguish the seven African species which also include <i>Didymoglossum ballardianum</i>, <i>Didymoglossum lenormandii</i>, and <i>Didymoglossum liberiense</i>. Once the taxonomy is clarified with respect to the distinct evolutionary lineages evidenced, the biogeographic history of the genus in Africa is discussed based on a divergence time estimation and the reconstruction of the ancestral geographic areas. These analyses reveal a Mesozoic (Cretaceous) vicariance event within <i>Didymoglossum</i> which is the second one hypothesized for the family Hymenophyllaceae.</p>","PeriodicalId":17087,"journal":{"name":"Journal of Systematics and Evolution","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jse.12951","citationCount":"0","resultStr":"{\"title\":\"Diversity, taxonomy, and history of the tropical fern genus Didymoglossum Desv. (Hymenophyllaceae, Polypodiidae) in Africa\",\"authors\":\"Jean-Yves Dubuisson, Adèle Nivart, Ehoarn Bidault, Vincent Deblauwe, Vincent Droissart, Narcisse G. Kamdem, Germinal Rouhan, Atsushi Ebihara, Timothée le Péchon\",\"doi\":\"10.1111/jse.12951\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The fern genus <i>Didymoglossum</i> (Hymenophyllaceae) is not so diverse in Africa with seven species at most. However, its local taxonomy is surprisingly still strongly debated, in particular within the <i>Didymoglossum erosum</i> complex interpreted either as a single polymorphic species or as a group of at least three distinct but morphologically very close taxa (<i>D. erosum</i>, <i>Didymoglossum chamaedrys</i>, and <i>Didymoglossum benlii</i>). Investigating these taxonomic issues and more generally the diversity of the genus in Africa and its origin, we conducted a complete anatomo–morphological analysis coupled with a molecular phylogenetic work based on <i>rbcL</i>. Our results support the recognition of all seven species, including <i>Didymoglossum robinsonii</i> that is likely distinct from the Neotropical <i>Didymoglossum reptans</i> to which the African populations were traditionally attributed. We here propose new characters and a novel key to distinguish the seven African species which also include <i>Didymoglossum ballardianum</i>, <i>Didymoglossum lenormandii</i>, and <i>Didymoglossum liberiense</i>. Once the taxonomy is clarified with respect to the distinct evolutionary lineages evidenced, the biogeographic history of the genus in Africa is discussed based on a divergence time estimation and the reconstruction of the ancestral geographic areas. These analyses reveal a Mesozoic (Cretaceous) vicariance event within <i>Didymoglossum</i> which is the second one hypothesized for the family Hymenophyllaceae.</p>\",\"PeriodicalId\":17087,\"journal\":{\"name\":\"Journal of Systematics and Evolution\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2023-02-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jse.12951\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Systematics and Evolution\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jse.12951\",\"RegionNum\":1,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Agricultural and Biological Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Systematics and Evolution","FirstCategoryId":"1089","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jse.12951","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
Diversity, taxonomy, and history of the tropical fern genus Didymoglossum Desv. (Hymenophyllaceae, Polypodiidae) in Africa
The fern genus Didymoglossum (Hymenophyllaceae) is not so diverse in Africa with seven species at most. However, its local taxonomy is surprisingly still strongly debated, in particular within the Didymoglossum erosum complex interpreted either as a single polymorphic species or as a group of at least three distinct but morphologically very close taxa (D. erosum, Didymoglossum chamaedrys, and Didymoglossum benlii). Investigating these taxonomic issues and more generally the diversity of the genus in Africa and its origin, we conducted a complete anatomo–morphological analysis coupled with a molecular phylogenetic work based on rbcL. Our results support the recognition of all seven species, including Didymoglossum robinsonii that is likely distinct from the Neotropical Didymoglossum reptans to which the African populations were traditionally attributed. We here propose new characters and a novel key to distinguish the seven African species which also include Didymoglossum ballardianum, Didymoglossum lenormandii, and Didymoglossum liberiense. Once the taxonomy is clarified with respect to the distinct evolutionary lineages evidenced, the biogeographic history of the genus in Africa is discussed based on a divergence time estimation and the reconstruction of the ancestral geographic areas. These analyses reveal a Mesozoic (Cretaceous) vicariance event within Didymoglossum which is the second one hypothesized for the family Hymenophyllaceae.
期刊介绍:
Journal of Systematics and Evolution (JSE, since 2008; formerly Acta Phytotaxonomica Sinica) is a plant-based international journal newly dedicated to the description and understanding of the biological diversity. It covers: description of new taxa, monographic revision, phylogenetics, molecular evolution and genome evolution, evolutionary developmental biology, evolutionary ecology, population biology, conservation biology, biogeography, paleobiology, evolutionary theories, and related subjects.