title: Oncidiinae (Orchidaceae) on the great curve of the Xingu River, Pará state, Brazil.
abstract: Among the studies on Orchidaceae in the Amazon, none comprised the region of the Great Curve of the Xingu River, located in the lower Xingu river. The aim of this study was to inventory and taxonomically study the species of Oncidiinae (Orchidaceae) in the Great Curve of the Xingu River, Pará state. The floristic survey was performed in the area of the Belo Monte hydroelectric plant, in the Vitória do Xingu municipality, centrally inserted in the called Great Curve of the Xingu River. Botanical collections were accomplished between June 2011 and December 2013. A total of 27 species of Oncidiinae, distributed in 15 genera, was inventoried in the study area. Notylia Lindl. and Trichocentrum Poepp. & Endl. were the richest genera, with five and four species, respectively, followed by Erycina Lindl., Ionopsis Kunth, Lockhartia Hook., Macradenia R.Br., and Ornithocephalus Hook., with two species each. The remaining eight genera are represented by a single species each in the study area. Morphological descriptions, a key for taxonomic identification, illustrations, and comments on distribution, ecology, phenology and morphology are provided for all inventoried species.
authors.affiliation: Museu Paraense Emílio Goeldi, Universidade Federal Rural da Amazônia, Belém, PA, Brazil.
authors.forename: M Q
authors.initials: MQ
authors.lastname: Carneiro-Silva
authors.affiliation: Núcleo de Pesquisa Orquidário do Estado, Instituto de Botânica de São Paulo, São Paulo, SP, Brazil.
authors.forename: A K
authors.initials: AK
authors.lastname: Koch
authors.affiliation: Museu Paraense Emílio Goeldi, Belém, PA, Brazil.
authors.forename: P L
authors.initials: PL
authors.lastname: Viana
authors.affiliation: Museu Paraense Emílio Goeldi, Belém, PA, Brazil.
authors.forename: A L
authors.initials: AL
authors.lastname: Ilkiu-Borges
mesh_terms: D044822:Biodiversity; D001938:Brazil; D017753:Ecosystem; D029595:Orchidaceae / Q000033:anatomy & histology / Q000145:classification* / Q000502:physiology; D063148:Plant Dispersal