Phylogenetic placement and taxonomy of the genus Hederorkis (Orchidaceae)

Joanna Mytnik-Ejsmont , Dariusz Lucjan Szlachetko , Przemysław Baranow , Kevin Jolliffe , Marcin Górniak

Abstract

Three plastid regions, matK, rpl32-trnL and rpl16 intron and the ITS1-5.8S-ITS2 nuclear ribosomal DNA were used to demonstrate a phylogenetic placement of the genus Hederorkis (Orchidaceae) for the first time. The taxonomic position of this genus has been unclear thus far. The phylogenetic and morphological relations of Hederorkis to the most closely related genera Sirhookera, Adrorhizon, Bromheadia and Polystachya are also discussed. A hypothesis concerning an origin and evolution of Hederorkis is proposed. Hederorkis is an epiphytic two-leaved orchid genus with lateral inflorescence, non-resupinate flowers, elongate gynostemium and rudimentary column foot. It is native to the Indian Ocean Islands. Two species of Hederorkis are recognized worldwide, H. scandens endemic to Mauritius and Réunion and H. seychellensis endemic to Seychelles. For each of the species treated a full synonymy, detailed description and illustration are included. The distribution map and dichotomous keys to the species have also been provided.
Author Joanna Mytnik-Ejsmont (FB / DPTNC)
Joanna Mytnik-Ejsmont,,
- Department of Plant Taxonomy and Nature Conservation
, Dariusz Lucjan Szlachetko (FB / DPTNC)
Dariusz Lucjan Szlachetko,,
- Department of Plant Taxonomy and Nature Conservation
, Przemysław Baranow (FB / DPTNC)
Przemysław Baranow,,
- Department of Plant Taxonomy and Nature Conservation
, Kevin Jolliffe
Kevin Jolliffe,,
-
, Marcin Górniak (FB / DME)
Marcin Górniak,,
- Department of Molecular Evolution
Journal seriesPlos One, ISSN 1932-6203, (A 35 pkt)
Issue year2015
Vol10
No4
Pages1-13
Publication size in sheets0.3
Keywords in EnglishOrchidaceae, Hederorkis, phylogeny, plastid and nuclear sequences, taxonomy, taxonomic revision, endemic
DOIDOI:10.1371/journal.pone.0122306
URL http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0122306
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)40
ScoreMinisterial score = 40.0, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, ArticleFromJournal
Publication indicators WoS Impact Factor: 2015 = 3.057 (2) - 2015=3.535 (5)
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