Mesadenus tenuissimus (L.O. Williams) Garay in Bot. Mus. Leafl. 28(4): 336. 1982 sec. Soto-Arenas & al. 2007
- ≡Spiranthes tenuissima L.O. Williams in Bot. Mus. Leafl. 12: 235, t. 33. 1946 syn. sec. Soto-Arenas & al. 2007
- =Brachystele tenuissima (L.O. Williams) Burns-Bal. in Orquídea (Mexico City) n.s. 10(1): 92. 1986 syn. sec. Soto-Arenas & al. 2007