The new Hispaniolan genus Tainus (Rubiaceae) constitutes an isolated lineage in the Caribbean biodiversity hotspot
Por:
Torres-Montufar, Alejandro, Borsch, Thomas, Fuentes, Susy, Clase, Teodoro, Peguero, Brigido, Ochoterena, Helga
Publicada:
1 dic 2017
Resumen:
The Caribbean islands are a well-known biodiversity hotspot of global importance. Hispaniola (Dominican Republic and Haiti) is a highly diverse island with 42% of its species endemic. Here we describe the new monotypic genus Tainus (Rubiaceae, Rondeletieae), which is endemic to the Sierra de Bahoruco-La Selle. This taxon was originally published as Rondeletia pitreana, but its taxonomic status has been doubtful. We performed phylogenetic analyses with three chloroplast regions (petD, trnK-matK and trnL-F) in order to test the relationships of R. pitreana to other species of Rondeletia and allied genera. Our molecular phylogeny underscores that R. pitreana does not belong to Rondeletia, but has an isolated position within Rondeletieae, whereas Acrosynanthus is sister to an assemblage of Mazaea, Phyllomelia, Rachicallis, Roigella and Rondeletia. The recognition of the genus Tainus is supported by molecular (simple sequence repeats) and morphological characters, among which the most conspicuous is the densely papillate ornamentation of the corolla mouth and lobes. Our findings reveal another case of endemism at a deeper phylogenetic level in flowering plants on Hispaniola. Furthermore, they emphasize the importance of exploring, collecting and performing phylogenetic analyses integrating samples from larger geographical areas across countries as a basis to support nature conservation. © 2017 The Authors ·.
Filiaciones:
Torres-Montufar, Alejandro:
Univ Nacl Autonoma Mexico, Posgrado Ciencias Biol, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Postal 70-367,Tercer Circuito S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
Borsch, Thomas:
Free Univ Berlin, Bot Garten & Bot Museum Berlin, Konigin Luise Str 6-8, D-14195 Berlin, Germany
Fuentes, Susy:
Free Univ Berlin, Bot Garten & Bot Museum Berlin, Konigin Luise Str 6-8, D-14195 Berlin, Germany
Clase, Teodoro:
Jardin Bot Nacl Dr Rafael Ma Moscoso, Apartado Postal 21-9, Santo Domingo, Dominican Rep
Peguero, Brigido:
Jardin Bot Nacl Dr Rafael Ma Moscoso, Apartado Postal 21-9, Santo Domingo, Dominican Rep
Ochoterena, Helga:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Postal 70-367,Tercer Circuito S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
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