A New Species of Cohniella (Orchidaceae, Cymbideae, Oncidiinae) from Amazonian Venezuela William Cetzal Ix El Colegio de la Frontera Sur, Unidad Chetumal, Av. del Centenario, Km 5.5, Chetumal 77000, Quintana Roo, Mexico.
[email protected] German Carnevali Ferna´ndez-Concha Herbario CICY, Centro de Investigacio´n Cientı´fica de Yucata´n, A.C., Apartado Postal 87, Cordemex, Me´rida 97310, Yucata´n, Mexico.
[email protected] ABSTRACT. A new species was detected while The genus Cohniella Pfitzer consists of 17 conducting a monographic study of Cohniella Pfitzer described species that are distributed from northern (Orchidaceae, Cymbideae, Oncidiinae). Cohniella Mexico into southern Brazil and northern Argentina. croizatii Cetzal & Carnevali is newly described from The members of this orchid genus can be easily material collected in the vicinity of Puerto Ayacucho distinguished from other members of the Oncidiinae and from the upper Orinoco, Amazonas State, by their succulent, terete leaves and Oncidium-like Venezuela. The new species is illustrated and its flowers (Carnevali et al., 2010). Characters used to affinities are discussed. The novelty is similar to C. distinguish species are mainly floral, such as the cebolleta (Jacq.) Christenson from northern Venezue- shape and position of the basal lobes of the lip, the la and Colombia, but differs in the callus that consists shape and number of teeth of the callus of the lip, and of three large, apical teeth of more or less similar size the column shape and position of the column wings. that emerge directly from the labellum disk, with the Additionally, we have used diagnostic elements for two lateral teeth marginally serrate to dentate on the species-level taxa that consider the size and proximal half.