Acianthera magalhanesii is a species of orchid. It is originally from Mines Gerais and Bahia, Brazil. It belongs to the section Sicaria.
It is characterized by a cespitose growth with secondary stems (also called ramicauls), with the triangular upper section, wider in the base that in the leaf, subsessile inflorescence with few or many flowers, floral segments often thick, or slightly pubescent or papillose, in a group of more fibrous and resistant plants, with canaliculate ramicauls without wings or with narrow wings, that resemble an additional leaf. This species is similar to Acianthera oligantha but smaller, with flowers smaller and all the lip, yellow, extended in the intermediate part.
Acianthera magalhanesii was described by (Pabst) F.Muds and published in Hoehnea 30(3): 186. 2003
Acianthera: generic name that it is a reference to the position of the anthers of some of his species.
magalhanesii: Epithet