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

Jean-Yves Dubuisson ¹Adèle Nivart ¹Ehoarn Bidault ²Vincent Deblauwe ³Vincent Droissart ⁴Narcisse G.Kamdem ⁵Germinal Rouhan ⁶Atsushi Ebihara ⁷Timothée le Péchon⁸

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作者信息

1. Institut de Systématique,Evolution,Biodiversité(ISYEB),Sorbonne Université,MNHN,CNRS,EPHE,Université des Antilles,CP 48,57 rue Cuvier 75005 Paris,France
2. 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
3. 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
4. Herbarium et Bibliothèque de Botanique africaine,CP 265,Université Libre de Bruxelles,Boulevard du Triomphe,B-1050 Brussels,Belgium;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
5. Plant Systematics and Ecology Laboratory,Higher Teachers'Training College,University of Yaoundé I,Yaoundé,Cameroon
6. 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
7. Department of Botany,National Museum of Nature and Science,4-1-1 Amakubo,Tsukuba 305-0005,Japan
8. 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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Abstract

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.

Key words

biogeography/filmy ferns/vicariance/western Indian Ocean

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基金项目

MNHN gives access to the collections in the framework of the RECOLNAT national Research Infrastructure(ANR-11-INBS-0004)

a JSPS fellowship for A.Ebihara()

BoEM laboratory of the MNHN()

SSM unit of the MNHN(UMS 2700)

Agence 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 Humi()

CENAREST(permit AR0045/19/MESRSTT/CENAREST/CG/CST/CSAR)

&&()

Wildlife Conservation Society(WCS)Gabon()

Fondation pour la Recherche sur la Biodiversité()

出版年

2024

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

参考文献量60

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