New species and records in the fern genus Didymoglossum for the flora of Seychelles, with notes on the Southeast Asian D. motleyi complex (Hymenophyllaceae)
| Autor: | Bruno Senterre, Jean-Yves Dubuisson, Germinal Rouhan, Charles Morel |
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| Přispěvatelé: | Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Centre de recherche sur la Paléobiodiversité et les Paléoenvironnements (CR2P), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Paléobotanique et Paléoécologie, Université Pierre et Marie Curie - Paris 6 (UPMC), Paléobiodiversité et paléoenvironnements |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Flora biology Ecology Didymoglossum Plant Science [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy Hymenophyllaceae biology.organism_classification Southeast asian 010603 evolutionary biology 01 natural sciences Herbarium Genus Trichomanes Fern Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
| Zdroj: | Phytotaxa Phytotaxa, 2017, 292 (3), pp.201. ⟨10.11646/phytotaxa.292.3.1⟩ |
| ISSN: | 1179-3163 1179-3155 |
| DOI: | 10.11646/phytotaxa.292.3.1 |
| Popis: | The fern flora of the Seychelles archipelago remains relatively poorly known. Recent projects involving the development of the Seychelles National Herbarium and study of key biodiversity areas have resulted in extensive explorations of the ferns on the granitic islands. Historical literature, newly collected specimens and older collections have been revised for the fern family Hymenophyllaceae as a prelude for a fern checklist, resulting in several discoveries. In Didymoglossum , specimens were found with a very unusual character: exsert sori. Revision of the specimens, including phylogenetic analyses, revealed that these belong to two distinct species: Didymoglossum beccarianum comb. nov. (until now only known from Southeast Asia) and a new species endemic to Seychelles, which is described as D. beaverianum below. The exact identity of the Southeast Asian species required to review a complex of species previously considered synonymous to D. motleyi . As a result, we propose a taxonomic hypothesis where Didymoglossum motleyi is in fact known from the type only (from Borneo); D. beccarianum includes the synonyms Trichomanes cognatum , T. sayeri and T. minutissimum and is widely distributed from Seychelles to the western Pacific Ocean and finally Didymoglossum ( Trichomanes ) cultratum comb. nov. , which is maintained as a separate species (endemic to Fiji and known from the type only). We conclude by emphasizing the main diagnostic characters in this complex of species, including characters that have been neglected in the past. |
| Databáze: | OpenAIRE |
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