Thecostele is a monotypic genus of orchids (family Orchidaceae) and of subtribe Cymbidiinae. The only species in the genus is Thecostele alata, first described as Cymbidium alatum by the Scottish botanist William Roxburgh in 1832. It was transferred to the genus Thecostele in 1874 by the English botanist Charles Samuel Pollock Parish and the German botanist Heinrich Gustav Reichenbach.