Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications

Jean-Yves Dubuisson , Timothée Le Pechon , Lucie Bauret , Germinal Rouhan , Catherine Reeb , Elodie Boucheron-Dubuisson , Marc-Andre Selosse , Cécile Chaussidon , Isabelle Dajoz , Kersley Pynee , Edmond Grangaud , Yannis Robert , Jean-Maurice Tamon , Sabine Hennequin


We here explore the diversity and ecology, and update the taxonomy of the fern family Hymenophyllaceae, which forms one of the most diverse and emblematic fern assemblages in rainforests of the Mascarene archipelago in western Indian Ocean. Since 1999, we extracted data from floras, literature, and field investigations conducted, and from an exhaustive examination of the collections at P, REU, and MAU. Our checklist recognizes 26 taxa involving 23 species, 2 local varieties and 1 new forma. We reconsider area of distribution in Mascarene Hymenophyllaceae and at least 3 species appear to be restricted to the archipelago. We discuss the updated taxonomy and discrimination of each taxon (including a new nomenclatural proposition for Hymenophyllum tenellum here renamed as H. fumarioides) and provide a dichotomous key. We present and discuss the ecology and elevational distribution of each species, in addition to the local endemicity. Finally, we emphasize the importance of threatened lowland rainforests and of wet ravines in semi-dry forests, which host a high level of diversity in the context of local conservation of habitats.
Author Jean-Yves Dubuisson
Jean-Yves Dubuisson,,
, Timothée Le Pechon
Timothée Le Pechon,,
, Lucie Bauret
Lucie Bauret,,
, Germinal Rouhan
Germinal Rouhan,,
, Catherine Reeb
Catherine Reeb,,
, Elodie Boucheron-Dubuisson
Elodie Boucheron-Dubuisson,,
, Marc-Andre Selosse (FB / DPTNC)
Marc-Andre Selosse,,
- Department of Plant Taxonomy and Nature Conservation
, Cécile Chaussidon
Cécile Chaussidon,,
, Isabelle Dajoz
Isabelle Dajoz,,
, Kersley Pynee
Kersley Pynee,,
et al.`
Journal seriesPhytotaxa, ISSN 1179-3155, (A 25 pkt)
Issue year2018
Publication size in sheets0.3
Keywords in EnglishMascarene archipelago, ferns, Hymenophyllaceae, western Indian Ocean, La Réunion, Mauritius, Pteridophytes
ASJC Classification1110 Plant Science; 1105 Ecology, Evolution, Behavior and Systematics
Languageen angielski
Score (nominal)25
Score sourcejournalList
ScoreMinisterial score = 25.0, 28-01-2020, ArticleFromJournal
Publication indicators WoS Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.741; WoS Impact Factor: 2018 = 1.168 (2) - 2018=1.131 (5)
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