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A new epiphytic species, Epidendrum sanchezii, is described from northeastern Brazil. The new species grows in the montane Atlantic forest of the states of Ceará and Pernambuco. It belongs to the E. difforme complex and is morphologically similar to E. angustatum, but the new species differs because it has smaller flowers, 7-veined sepals, a lip with a(More)
A new species, Lockhartia viruensis, is described and illustrated from the state of Roraima, in the Brazilian Amazon, and its affinities are discussed. The new species is similar to L. imbricata, but differs by having an entire lip with an obtuse to rounded apex, a callus on the disk of the lip with a longitudinal row of papillae with a rounded apex, and(More)
The present study focuses on the structure and function of phytoplankton community during periods of marked changes in hydrological traits, influenced by an atypical climatic event (La Niña) and its impact on Armando Ribeiro Gonçalves Reservoir of Rio Grande do Norte, situated in the Caatinga biome of northeastern Brazil. The main questions addressed were:(More)