Acianthera bilobulata (Orchidaceae: Pleurothallidinae), a new species from Southwestern Ecuador

Acianthera bilobulata is described and illustrated as new species. Information concerning distribution, habitat, phenology, and conservation status are provided. The new taxon is compared with the most similar species A. pubescens, from which it differs by its elliptic-lanceolate leaves, yellow-cream flowers suffused with red-purple, acute, marginally erose petals, and an oblong, obtuse, marginally entire lip with oblong, rounded lateral lobes. Furthermore, A. bilobulata is compared with other three morphologically similar species, A. breedlovei, A. henrici, and A. majakoluckae.