Título
A Combined Evidence Phylogenetic Re-circumscription and a Taxonomic Revision of Lophiarella (Orchidaceae: Oncidiinae)
Autor
GERMAN CARNEVALI FERNANDEZ CONCHA
Nivel de Acceso
Acceso Abierto
Resumen o descripción
—We demonstrate, through separate and combined phylogenetic analyses of morphological characters, nucleotide sequences,
and coded gaps of two DNA regions (plastid rpl32-trnL and nrDNA-ITS) using parsimony and Bayesian inference, that Lophiarella
(Orchidaceae), as originally circumscribed, is polyphyletic. We re-circumscribe the genus to exclude one of the two species included in
the original description and include two others, which requires two new combinations: Lophiarella splendida and Lophiarella
flavovirens. As newly circumscribed, Lophiarella is strongly supported as a monophyletic assemblage within the Trichocentrum-clade,
where it is sister to the (Cohniella, (Trichocentrum, Lophiaris)) clade. Lophiarella is easily diagnosable within the Trichocentrum-clade,
among other characters, by the conduplicate yet rigidly fleshy-coriaceous leaves and the rigidly erect inflorescences with peduncles
coated with a conspicuous, waxy film. In the context of a phylogenetic analysis, we discuss the evolution of several taxonomically,
ecologically and biogeographically relevant characters, such as rostellum shape, vegetative architecture, labellum, and column structure.
We also present a key to the genera of the Trichocentrum-clade and a taxonomic revision of the species of Lophiarella with keys,
descriptions, nomenclature, iconography, discussion of affinities, ecological and biogeographical information, a distribution map, and
full exsiccata citations.
Fecha de publicación
5 de febrero de 2013
Tipo de publicación
Artículo
Recurso de información
Formato
application/pdf
Repositorio Orígen
Repositorio Institucional CICY
Descargas
2061