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

Formato

application/pdf

Repositorio Orígen

Repositorio Institucional CICY

Descargas

2061

Comentarios



Necesitas iniciar sesión o registrarte para comentar.