首页|Diversity,taxonomy,and history of the tropical fern genus Didymoglossum Desv.(Hymenophyllaceae,Polypodiidae)in Africa

Diversity,taxonomy,and history of the tropical fern genus Didymoglossum Desv.(Hymenophyllaceae,Polypodiidae)in Africa

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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.

biogeographyfilmy fernsvicariancewestern Indian Ocean

Jean-Yves Dubuisson、Adèle Nivart、Ehoarn Bidault、Vincent Deblauwe、Vincent Droissart、Narcisse G.Kamdem、Germinal Rouhan、Atsushi Ebihara、Timothée le Péchon

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Institut de Systématique,Evolution,Biodiversité(ISYEB),Sorbonne Université,MNHN,CNRS,EPHE,Université des Antilles,CP 48,57 rue Cuvier 75005 Paris,France

Missouri Botanical Garden,Africa & Madagascar Department,4344 Shaw Boulevard,Saint Louis,MO 63110,USA

Institut de Systématique,Evolution,Biodiversité(ISYEB),Muséum national d'Histoire naturelle,CNRS,SU,EPHE,Université des Antilles,CP 39,57 rue Cuvier,75005 Paris,France

Herbarium et Bibliothèque de Botanique africaine,CP 265,Université Libre de Bruxelles,Boulevard du Triomphe,B-1050 Brussels,Belgium

International Institute of Tropical Agriculture(IITA),BP 2008(Messa),Yaoundé,Cameroon

Center for Tropical Research,Institute of the Environment and Sustainability,University of California Los Angeles,Los Angeles,CA 90095,USA

AMAP Lab,Univ.Montpellier,IRD,CNRS,INRAE,CIRAD,Montpellier,France

Plant Systematics and Ecology Laboratory,Higher Teachers'Training College,University of Yaoundé I,Yaoundé,Cameroon

Department of Botany,National Museum of Nature and Science,4-1-1 Amakubo,Tsukuba 305-0005,Japan

Meise Botanic Garden,Nieuwelaan 38 1860 Meise,Belgium

Fédération Wallonie-Bruxelles,Service Général de I'Enseignement supérieur et de la Recherche scientifique,1 rue A.Lavallde 1080 Bruxelles,Belgium

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MNHN gives access to the collections in the framework of the RECOLNAT national Research Infrastructurea JSPS fellowship for A.EbiharaBoEM laboratory of the MNHNSSM unit of the MNHNAgence Nationale des Parcs Nationaux(ANPN)Direction Générale de l'Environnement in the frame of the Projet d'Appui à la gestion durable des écosystèmes des Zones HumiCENAREST&&Wildlife Conservation Society(WCS)GabonFondation pour la Recherche sur la Biodiversité

ANR-11-INBS-0004UMS 2700permit AR0045/19/MESRSTT/CENAREST/CG/CST/CSAR

2024

10.1111/jse.12951

植物分类学报
中国科学院植物研究所　中国植物学会

植物分类学报

CSTPCD
影响因子：0.322
ISSN：1674-4918
年,卷(期)：2024.62(1)
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